alfresco-community-repo/source/java/org/alfresco/repo/jscript/ScriptNode.java

/*
 * Copyright (C) 2005-2011 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
 */
package org.alfresco.repo.jscript;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Serializable;
import java.nio.charset.Charset;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.StringTokenizer;

import org.alfresco.error.AlfrescoRuntimeException;
import org.alfresco.model.ApplicationModel;
import org.alfresco.model.ContentModel;
import org.alfresco.repo.action.executer.TransformActionExecuter;
import org.alfresco.repo.content.transform.magick.ImageTransformationOptions;
import org.alfresco.repo.search.QueryParameterDefImpl;
import org.alfresco.repo.security.permissions.AccessDeniedException;
import org.alfresco.repo.tagging.script.TagScope;
import org.alfresco.repo.thumbnail.ThumbnailDefinition;
import org.alfresco.repo.thumbnail.ThumbnailHelper;
import org.alfresco.repo.thumbnail.ThumbnailRegistry;
import org.alfresco.repo.thumbnail.script.ScriptThumbnail;
import org.alfresco.repo.transaction.AlfrescoTransactionSupport;
import org.alfresco.repo.version.VersionModel;
import org.alfresco.repo.workflow.jscript.JscriptWorkflowInstance;
import org.alfresco.scripts.ScriptException;
import org.alfresco.service.ServiceRegistry;
import org.alfresco.service.cmr.action.Action;
import org.alfresco.service.cmr.dictionary.DataTypeDefinition;
import org.alfresco.service.cmr.dictionary.DictionaryService;
import org.alfresco.service.cmr.lock.LockStatus;
import org.alfresco.service.cmr.model.FileFolderService;
import org.alfresco.service.cmr.model.FileInfo;
import org.alfresco.service.cmr.model.FileNotFoundException;
import org.alfresco.service.cmr.model.PagingFileInfoRequest;
import org.alfresco.service.cmr.model.PagingFileInfoResults;
import org.alfresco.service.cmr.repository.AssociationRef;
import org.alfresco.service.cmr.repository.ChildAssociationRef;
import org.alfresco.service.cmr.repository.ContentData;
import org.alfresco.service.cmr.repository.ContentReader;
import org.alfresco.service.cmr.repository.ContentService;
import org.alfresco.service.cmr.repository.ContentWriter;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.service.cmr.repository.Path;
import org.alfresco.service.cmr.repository.StoreRef;
import org.alfresco.service.cmr.repository.TemplateImageResolver;
import org.alfresco.service.cmr.search.QueryParameterDefinition;
import org.alfresco.service.cmr.security.AccessPermission;
import org.alfresco.service.cmr.security.AccessStatus;
import org.alfresco.service.cmr.security.PermissionService;
import org.alfresco.service.cmr.thumbnail.ThumbnailService;
import org.alfresco.service.cmr.version.Version;
import org.alfresco.service.cmr.version.VersionHistory;
import org.alfresco.service.cmr.version.VersionType;
import org.alfresco.service.cmr.workflow.WorkflowInstance;
import org.alfresco.service.cmr.workflow.WorkflowService;
import org.alfresco.service.namespace.NamespaceException;
import org.alfresco.service.namespace.NamespacePrefixResolver;
import org.alfresco.service.namespace.NamespacePrefixResolverProvider;
import org.alfresco.service.namespace.NamespaceService;
import org.alfresco.service.namespace.QName;
import org.alfresco.service.namespace.RegexQNamePattern;
import org.alfresco.util.GUID;
import org.alfresco.util.ISO9075;
import org.alfresco.util.Pair;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.json.JSONException;
import org.json.JSONObject;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptableObject;
import org.mozilla.javascript.UniqueTag;
import org.mozilla.javascript.Wrapper;
import org.springframework.extensions.surf.util.Content;
import org.springframework.extensions.surf.util.ParameterCheck;
import org.springframework.extensions.surf.util.URLEncoder;

/**
 * Script Node class implementation, specific for use by ScriptService as part of the object model.
 * <p>
 * The class exposes Node properties, children and assocs as dynamically populated maps and lists. The various collection classes are mirrored as JavaScript properties. So can be
 * accessed using standard JavaScript property syntax, such as <code>node.children[0].properties.name</code>.
 * <p>
 * Various helper methods are provided to access common and useful node variables such as the content url and type information.
 * 
 * @author Kevin Roast
 */
public class ScriptNode implements Serializable, Scopeable, NamespacePrefixResolverProvider
{
    private static final long serialVersionUID = -3378946227712939601L;
    
    private static Log logger = LogFactory.getLog(ScriptNode.class);
    
    private final static String NAMESPACE_BEGIN = "" + QName.NAMESPACE_BEGIN;
    
    private final static String CONTENT_DEFAULT_URL = "/d/d/{0}/{1}/{2}/{3}";
    private final static String CONTENT_DOWNLOAD_URL = "/d/a/{0}/{1}/{2}/{3}";
    private final static String CONTENT_PROP_URL = "/d/d/{0}/{1}/{2}/{3}?property={4}";
    private final static String CONTENT_DOWNLOAD_PROP_URL = "/d/a/{0}/{1}/{2}/{3}?property={4}";
    private final static String FOLDER_BROWSE_URL = "/n/browse/{0}/{1}/{2}";
    
    /** Root scope for this object */
    protected Scriptable scope;
    
    /** Node Value Converter */
    protected NodeValueConverter converter = null;
    
    /** Cached values */
    protected NodeRef nodeRef;
    
    private FileInfo nodeInfo;
    
    private String name;
    private QName type;
    protected String id;
    protected String siteName;
    protected boolean siteNameResolved = false;
    
    /** The aspects applied to this node */
    protected Set<QName> aspects = null;
    
    /** The target associations from this node */
    private ScriptableQNameMap<String, Object> targetAssocs = null;
    
    /** The source associations to this node */
    private ScriptableQNameMap<String, Object> sourceAssocs = null;
    
    /** The child associations for this node */
    private ScriptableQNameMap<String, Object> childAssocs = null;
    
    /** The children of this node */
    private Scriptable children = null;
    
    /** The properties of this node */
    private ScriptableQNameMap<String, Serializable> properties = null;

    /** The versions of this node */
    private Scriptable versions = null;

    /** The active workflows acting on this node */
    private Scriptable activeWorkflows = null;

    protected ServiceRegistry services = null;
    private NodeService nodeService = null;
    private FileFolderService fileFolderService = null;
    private Boolean isDocument = null;
    private Boolean isContainer = null;
    private Boolean isLinkToDocument = null;
    private Boolean isLinkToContainer = null;
    private Boolean hasChildren = null;
    private String displayPath = null;
    protected TemplateImageResolver imageResolver = null;
    protected ScriptNode parent = null;
    private ChildAssociationRef primaryParentAssoc = null;
    private ScriptableQNameMap<String, Object> parentAssocs = null;
    // NOTE: see the reset() method when adding new cached members!
    
    
    // ------------------------------------------------------------------------------
    // Construction
    
    /**
     * Constructor
     * 
     * @param nodeRef   The NodeRef this Node wrapper represents
     * @param services  The ServiceRegistry the Node can use to access services
     */
    public ScriptNode(NodeRef nodeRef, ServiceRegistry services)
    {
        this(nodeRef, services, null);
    }
    
    /**
     * Constructor
     * 
     * @param nodeRef   The NodeRef this Node wrapper represents
     * @param services  The ServiceRegistry the Node can use to access services
     * @param scope     Root scope for this Node
     */
    public ScriptNode(FileInfo nodeInfo, ServiceRegistry services, Scriptable scope)
    {
        this(nodeInfo.getNodeRef(), services, scope);
        
        this.nodeInfo = nodeInfo;
    }
    
    public ScriptNode(NodeRef nodeRef, ServiceRegistry services, Scriptable scope)
    {
        if (nodeRef == null)
        {
            throw new IllegalArgumentException("NodeRef must be supplied.");
        }
        
        if (services == null)
        {
            throw new IllegalArgumentException("The ServiceRegistry must be supplied.");
        }
        
        this.nodeRef = nodeRef;
        this.id = nodeRef.getId();
        this.services = services;
        this.nodeService = services.getNodeService();
        this.fileFolderService = services.getFileFolderService();
        this.scope = scope;
    }
    
    @Override
    public int hashCode()
    {
        final int PRIME = 31;
        int result = 1;
        result = PRIME * result + ((nodeRef == null) ? 0 : nodeRef.hashCode());
        return result;
    }
    
    @Override
    public boolean equals(Object obj)
    {
        if (this == obj) return true;
        if (obj == null) return false;
        if (getClass() != obj.getClass()) return false;
        if (!nodeRef.equals(((ScriptNode)obj).nodeRef)) return false;
        return true;
    }
    
    /**
     * Factory method
     */
    public ScriptNode newInstance(NodeRef nodeRef, ServiceRegistry services, Scriptable scope)
    {
        return new ScriptNode(nodeRef, services, scope);
    }
    
    public ScriptNode newInstance(FileInfo nodeInfo, ServiceRegistry services, Scriptable scope)
    {
        return new ScriptNode(nodeInfo, services, scope);
    }
    
    /**
     * @see org.alfresco.repo.jscript.Scopeable#setScope(org.mozilla.javascript.Scriptable)
     */
    public void setScope(Scriptable scope)
    {
        this.scope = scope;
    }
    
    
    // ------------------------------------------------------------------------------
    // Node Wrapper API
    
    /**
     * @return The GUID for the node
     */
    public String getId()
    {
        return this.id;
    }
    
    /**
     * @return the store type for the node
     */
    public String getStoreType()
    {
        return this.nodeRef.getStoreRef().getProtocol();    
    }
    
    /**
     * @return the store id for the node
     */
    public String getStoreId()
    {
        return this.nodeRef.getStoreRef().getIdentifier();
    }
    
    /**
     * @return Returns the NodeRef this Node object represents
     */
    public NodeRef getNodeRef()
    {
        return this.nodeRef;
    }
    
    /**
     * @return Returns the QName type.
     */
    public QName getQNameType()
    {
        if (this.type == null)
        {
            this.type = this.nodeService.getType(this.nodeRef);
        }
        
        return type;
    }
    
    /**
     * @return Returns the type.
     */
    public String getType()
    {
        return getQNameType().toString();
    }

    /**
     * @return Returns the type in short format.
     */
    public String getTypeShort()
    {
        return this.getShortQName(getQNameType());
    }

    /**
     * @return Helper to return the 'name' property for the node
     */
    public String getName()
    {
        if (this.name == null)
        {
            // try and get the name from the properties first
            this.name = (String) getProperties().get("cm:name");
            
            // if we didn't find it as a property get the name from the association name
            if (this.name == null)
            {
                ChildAssociationRef parentRef = this.nodeService.getPrimaryParent(this.nodeRef);
                if (parentRef != null && parentRef.getQName() != null)
                {
                    this.name = parentRef.getQName().getLocalName();
                }
                else
                {
                    this.name = "";
                }
            }
        }
        
        return this.name;
    }
    
    /**
     * Helper to set the 'name' property for the node.
     * 
     * @param name Name to set
     */
    public void setName(String name)
    {
        if (name != null)
        {
            QName typeQName = getQNameType();
            if ((services.getDictionaryService().isSubClass(typeQName, ContentModel.TYPE_FOLDER) &&
                 !services.getDictionaryService().isSubClass(typeQName, ContentModel.TYPE_SYSTEM_FOLDER)) ||
                 services.getDictionaryService().isSubClass(typeQName, ContentModel.TYPE_CONTENT))
            {
                try
                {
                   this.services.getFileFolderService().rename(this.nodeRef, name);
                }
                catch (FileNotFoundException e)
                {
                    throw new AlfrescoRuntimeException("Failed to rename node " + nodeRef + " to " + name, e);
                }
            }
            this.getProperties().put(ContentModel.PROP_NAME.toString(), name.toString());
        }
    }
    
    /**
     * @return The children of this Node as JavaScript array of Node object wrappers
     */
    public Scriptable getChildren()
    {
        if (this.children == null)
        {
            List<ChildAssociationRef> childRefs = this.nodeService.getChildAssocs(this.nodeRef);
            Object[] children = new Object[childRefs.size()];
            for (int i = 0; i < childRefs.size(); i++)
            {
                // create our Node representation from the NodeRef
                children[i] = newInstance(childRefs.get(i).getChildRef(), this.services, this.scope);
            }
            this.children = Context.getCurrentContext().newArray(this.scope, children);
            this.hasChildren = (children.length != 0);
        }
        
        return this.children;
    }
    
    /**
     * @return true if the Node has children
     */
    public boolean getHasChildren()
    {
        if (this.hasChildren == null)
        {
            this.hasChildren = !this.services.getNodeService().getChildAssocs(
                  getNodeRef(), RegexQNamePattern.MATCH_ALL, RegexQNamePattern.MATCH_ALL, false).isEmpty();
        }
        return hasChildren;
    }
    
    /**
     * childByNamePath returns the Node at the specified 'cm:name' based Path walking the children of this Node.
     *         So a valid call might be:
     *         <code>mynode.childByNamePath("/QA/Testing/Docs");</code>
     *         
     *         is a leading / required? No, but it can be specified.
     *         are wild-cards supported? Does not seem to be used anywhere
     * 
     * @return The ScriptNode or null if the node is not found.
     */
    public ScriptNode childByNamePath(String path)
    {
        ScriptNode child = null;
        
        if (this.services.getDictionaryService().isSubClass(getQNameType(), ContentModel.TYPE_FOLDER))
        {
            /**
             * The current node is a folder.
             * optimized code path for cm:folder and sub-types supporting getChildrenByName() method
             */ 
            NodeRef result = null;
            StringTokenizer t = new StringTokenizer(path, "/");
            if (t.hasMoreTokens())
            {
                result = this.nodeRef;
                while (t.hasMoreTokens() && result != null)
                {
                    String name = t.nextToken();
                    try
                    {
                        result = this.nodeService.getChildByName(result, ContentModel.ASSOC_CONTAINS, name);
                    }
                    catch (AccessDeniedException ade)
                    {
                        result = null;
                    }
                }
            }
            
            child = (result != null ? newInstance(result, this.services, this.scope) : null);
        }
        else
        {
            /**
             * The current node is not a folder.   Perhaps it is Company Home ?
             */
            // convert the name based path to a valid XPath query
            StringBuilder xpath = new StringBuilder(path.length() << 1);
            StringTokenizer t = new StringTokenizer(path, "/");
            int count = 0;
            QueryParameterDefinition[] params = new QueryParameterDefinition[t.countTokens()];
            DataTypeDefinition ddText =
                this.services.getDictionaryService().getDataType(DataTypeDefinition.TEXT);
            NamespaceService ns = this.services.getNamespaceService();
            while (t.hasMoreTokens())
            {
                if (xpath.length() != 0)
                {
                    xpath.append('/');
                }
                String strCount = Integer.toString(count);
                xpath.append("*[@cm:name=$cm:name")
                     .append(strCount)
                     .append(']');
                params[count++] = new QueryParameterDefImpl(
                        QName.createQName(NamespaceService.CONTENT_MODEL_PREFIX, "name" + strCount, ns),
                        ddText,
                        true,
                        t.nextToken());
            }
            
            Object[] nodes = getChildrenByXPath(xpath.toString(), params, true);
            
            child = (nodes.length != 0) ? (ScriptNode)nodes[0] : null;
        }
        
        return child;
    }
    
    /**
     * @return Returns a JavaScript array of Nodes at the specified XPath starting at this Node.
     *         So a valid call might be <code>mynode.childrenByXPath("*[@cm:name='Testing']/*");</code>
     */
    public Scriptable childrenByXPath(String xpath)
    {
        return Context.getCurrentContext().newArray(this.scope, getChildrenByXPath(xpath, null, false));
    }
    
    /**
     * @return Returns a JavaScript array of child file/folder nodes for this nodes.
     *         Automatically retrieves all sub-types of cm:content and cm:folder, also removes
     *         system folder types from the results.
     *         This is equivalent to @see FileFolderService.list() 
     */
    public Scriptable childFileFolders()
    {
        return childFileFolders(true, true, null);
    }
    
    /**
     * @param files     Return files extending from cm:content
     * @param folders   Return folders extending from cm:folder - ignoring sub-types of cm:systemfolder
     * 
     * @return Returns a JavaScript array of child file/folder nodes for this nodes.
     *         Automatically retrieves all sub-types of cm:content and cm:folder, also removes
     *         system folder types from the results.
     *         This is equivalent to @see FileFolderService.listFiles() and @see FileFolderService.listFolders()
     */
    public Scriptable childFileFolders(boolean files, boolean folders)
    {
        return childFileFolders(files, folders, null);
    }
    
    /**
     * @param files         Return files extending from cm:content
     * @param folders       Return folders extending from cm:folder - ignoring sub-types of cm:systemfolder
     * @param ignoreTypes   Also optionally removes additional type qnames. The additional type can be
     *                      specified in short or long qname string form as a single string or an Array e.g. "fm:forum".
     * 
     * @return Returns a JavaScript array of child file/folder nodes for this nodes.
     *         Automatically retrieves all sub-types of cm:content and cm:folder, also removes
     *         system folder types from the results.
     *         This is equivalent to @see FileFolderService.listFiles() and @see FileFolderService.listFolders()
     */
    public Scriptable childFileFolders(boolean files, boolean folders, Object ignoreTypes)
    {
        return childFileFolders(files, folders, ignoreTypes, -1, -1, 0, null, null, null).getPage();
    }
    
    /**
     * @param files         Return files extending from cm:content
     * @param folders       Return folders extending from cm:folder - ignoring sub-types of cm:systemfolder
     * @param ignoreTypes   Also optionally removes additional type qnames. The additional type can be
     *                      specified in short or long qname string form as a single string or an Array e.g. "fm:forum".
     * @param maxItems      Max number of items
     *                      
     * @return Returns ScriptPagingNodes which includes a JavaScript array of child file/folder nodes for this nodes.
     *         Automatically retrieves all sub-types of cm:content and cm:folder, also removes
     *         system folder types from the results.
     *         This is equivalent to @see FileFolderService.listFiles() and @see FileFolderService.listFolders()
     *         
     * @deprecated API for review (subject to change prior to release)
     *
     * @author janv
     * @since 4.0
     */
    public ScriptPagingNodes childFileFolders(boolean files, boolean folders, Object ignoreTypes, int maxItems)
    {
        return childFileFolders(files, folders, ignoreTypes, 0, maxItems, 0, null, null, null);
    }
    
    @SuppressWarnings("unchecked")
    /**
     * @param files                Return files extending from cm:content
     * @param folders              Return folders extending from cm:folder - ignoring sub-types of cm:systemfolder
     * @param ignoreTypes          Also optionally removes additional type qnames. The additional type can be
     *                             specified in short or long qname string form as a single string or an Array e.g. "fm:forum".
     * @param skipOffset           Items to skip (e.g. 0 or (num pages to skip * size of page)
     * @param maxItems             Max number of items (eg. size of page)
     * @param requestTotalCountMax Request total count (upto a given max total count)
     *                             Note: if 0 then total count is not requested and the query may be able to optimise/cutoff for max items)
     * @param sortProp             Optional sort property as a prefix qname string (e.g. "cm:name"). Also supports special 
     *                             content case (i.e. "cm:content.size" and "cm:content.mimetype")
     * @param sortAsc              Given a sort property, true => ascending, false => descending
     * @param queryExecutionId     If paging then can pass back the previous query execution (as a hint for possible query optimisation)
     *                             
     * @return Returns ScriptPagingNodes which includes a JavaScript array of child file/folder nodes for this nodes.
     *         Automatically retrieves all sub-types of cm:content and cm:folder, also removes
     *         system folder types from the results.
     *         This is equivalent to @see FileFolderService.listFiles() and @see FileFolderService.listFolders()
     *         
     * @author janv
     * @since 4.0
     */
    public ScriptPagingNodes childFileFolders(boolean files, boolean folders, Object ignoreTypes, int skipOffset, int maxItems, int requestTotalCountMax, String sortProp, Boolean sortAsc, String queryExecutionId)
    {
        Object[] results;
        
        Set<QName> ignoreTypeQNames = new HashSet<QName>(5);
        
        // Add user defined types to ignore
        if (ignoreTypes instanceof ScriptableObject)
        {
            Serializable types = getValueConverter().convertValueForRepo((ScriptableObject)ignoreTypes);
            if (types instanceof List)
            {
                for (Serializable typeObj : (List<Serializable>)types)
                {
                    ignoreTypeQNames.add(createQName(typeObj.toString()));
                }
            }
            else if (types instanceof String)
            {
                ignoreTypeQNames.add(createQName(types.toString()));
            }
        }
        else if (ignoreTypes instanceof String)
        {
            ignoreTypeQNames.add(createQName(ignoreTypes.toString()));
        }
        
        List<Pair<QName, Boolean>> sortProps = null; // note: null sortProps => get all in default sort order
        if (sortProp != null)
        {
            sortProps = new ArrayList<Pair<QName, Boolean>>(1);
            sortProps.add(new Pair<QName, Boolean>(createQName(sortProp), sortAsc));
        }
        
        PagingFileInfoRequest pageRequest = new PagingFileInfoRequest(skipOffset, maxItems, sortProps, queryExecutionId);
        pageRequest.setRequestTotalCountMax(requestTotalCountMax);
        
        PagingFileInfoResults pageOfNodeInfos = this.fileFolderService.list(this.nodeRef, files, folders, ignoreTypeQNames, pageRequest);
        
        List<FileInfo> nodeInfos = pageOfNodeInfos.getPage();
        
        int size = nodeInfos.size();
        results = new Object[size];
        for (int i=0; i<size; i++)
        {
            FileInfo nodeInfo = nodeInfos.get(i);
            results[i] = newInstance(nodeInfo, this.services, this.scope);
        }
        
        int totalResultCountLower = -1;
        int totalResultCountUpper = -1;
        
        Pair<Integer, Integer> totalResultCount = pageOfNodeInfos.getTotalResultCount();
        if (totalResultCount != null)
        {
            totalResultCountLower = (totalResultCount.getFirst() != null ? totalResultCount.getFirst() : -1);
            totalResultCountUpper = (totalResultCount.getSecond() != null ? totalResultCount.getSecond() : -1);
        }
        
        return new ScriptPagingNodes(Context.getCurrentContext().newArray(this.scope, results), pageOfNodeInfos.hasMoreItems(), totalResultCountLower, totalResultCountUpper);
    }
    
    /**
     * Return the target associations from this Node. As a Map of assoc type to a JavaScript array of Nodes.
     * The Map returned implements the Scriptable interface to allow access to the assoc arrays via JavaScript
     * associative array access. This means associations of this node can be access thus:
     * <code>node.assocs["translations"][0]</code>
     * 
     * @return target associations as a Map of assoc name to a JavaScript array of Nodes.
     */
    @SuppressWarnings("unchecked")
    public Map<String, Object> getAssocs()
    {
        if (this.targetAssocs == null)
        {
            // this Map implements the Scriptable interface for native JS syntax property access
            this.targetAssocs = new ScriptableQNameMap<String, Object>(this);

            // get the list of target nodes for each association type
            List<AssociationRef> refs = this.nodeService.getTargetAssocs(this.nodeRef, RegexQNamePattern.MATCH_ALL);
            for (AssociationRef ref : refs)
            {
                String qname = ref.getTypeQName().toString();
                List<ScriptNode> nodes = (List<ScriptNode>)this.targetAssocs.get(qname);
                if (nodes == null)
                {
                    // first access of the list for this qname
                    nodes = new ArrayList<ScriptNode>(4);
                }
                this.targetAssocs.put(ref.getTypeQName().toString(), nodes);
                nodes.add(newInstance(ref.getTargetRef(), this.services, this.scope));
            }
            
            // convert each Node list into a JavaScript array object
            for (String qname : this.targetAssocs.keySet())
            {
                List<ScriptNode> nodes = (List<ScriptNode>)this.targetAssocs.get(qname);
                Object[] objs = nodes.toArray(new Object[nodes.size()]);
                this.targetAssocs.put(qname, Context.getCurrentContext().newArray(this.scope, objs));
            }
        }

        return this.targetAssocs;
    }
    
    public Map<String, Object> getAssociations()
    {
        return getAssocs();
    }
    
    /**
     * Return the source associations to this Node. As a Map of assoc name to a JavaScript array of Nodes.
     * The Map returned implements the Scriptable interface to allow access to the assoc arrays via JavaScript
     * associative array access. This means source associations to this node can be access thus:
     * <code>node.sourceAssocs["translations"][0]</code>
     * 
     * @return source associations as a Map of assoc name to a JavaScript array of Nodes.
     */
    @SuppressWarnings("unchecked")
    public Map<String, Object> getSourceAssocs()
    {
        if (this.sourceAssocs == null)
        {
            // this Map implements the Scriptable interface for native JS syntax property access
            this.sourceAssocs = new ScriptableQNameMap<String, Object>(this);

            // get the list of source nodes for each association type
            List<AssociationRef> refs = this.nodeService.getSourceAssocs(this.nodeRef, RegexQNamePattern.MATCH_ALL);
            for (AssociationRef ref : refs)
            {
                String qname = ref.getTypeQName().toString();
                List<ScriptNode> nodes = (List<ScriptNode>)this.sourceAssocs.get(qname);
                if (nodes == null)
                {
                    // first access of the list for this qname
                    nodes = new ArrayList<ScriptNode>(4);
                    this.sourceAssocs.put(ref.getTypeQName().toString(), nodes);
                }
                nodes.add(newInstance(ref.getSourceRef(), this.services, this.scope));
            }
            
            // convert each Node list into a JavaScript array object
            for (String qname : this.sourceAssocs.keySet())
            {
                List<ScriptNode> nodes = (List<ScriptNode>)this.sourceAssocs.get(qname);
                Object[] objs = nodes.toArray(new Object[nodes.size()]);
                this.sourceAssocs.put(qname, Context.getCurrentContext().newArray(this.scope, objs));
            }
        }
        
        return this.sourceAssocs;
    }
    
    public Map<String, Object> getSourceAssociations()
    {
        return getSourceAssocs();
    }
    
    /**
     * Return the child associations from this Node. As a Map of assoc name to a JavaScript array of Nodes.
     * The Map returned implements the Scriptable interface to allow access to the assoc arrays via JavaScript
     * associative array access. This means associations of this node can be access thus:
     * <code>node.childAssocs["contains"][0]</code>
     * 
     * @return child associations as a Map of assoc name to a JavaScript array of Nodes.
     */
    @SuppressWarnings("unchecked")
    public Map<String, Object> getChildAssocs()
    {
        if (this.childAssocs == null)
        {
            // this Map implements the Scriptable interface for native JS syntax property access
            this.childAssocs = new ScriptableQNameMap<String, Object>(this);
            
            // get the list of child assoc nodes for each association type
            List<ChildAssociationRef> refs = this.nodeService.getChildAssocs(nodeRef);
            for (ChildAssociationRef ref : refs)
            {
                String qname = ref.getTypeQName().toString();
                List<ScriptNode> nodes = (List<ScriptNode>)this.childAssocs.get(qname);
                if (nodes == null)
                {
                    // first access of the list for this qname
                    nodes = new ArrayList<ScriptNode>(4);
                    this.childAssocs.put(ref.getTypeQName().toString(), nodes);
                }
                nodes.add(newInstance(ref.getChildRef(), this.services, this.scope));
            }
            
            // convert each Node list into a JavaScript array object
            for (String qname : this.childAssocs.keySet())
            {
                List<ScriptNode> nodes = (List<ScriptNode>)this.childAssocs.get(qname);
                Object[] objs = nodes.toArray(new Object[nodes.size()]);
                this.childAssocs.put(qname, Context.getCurrentContext().newArray(this.scope, objs));
            }
        }
        
        return this.childAssocs;
    }
    
    public Map<String, Object> getChildAssociations()
    {
        return getChildAssocs();
    }
    
    /**
     * Return an Array of the associations from this Node that match a specific object type.
     * <code>node.getChildAssocsByType("cm:folder")[0]</code>
     * 
     * @return Array of child associations from this Node that match a specific object type.
     */
    public Scriptable getChildAssocsByType(String type)
    {
        // get the list of child assoc nodes for each association type
        Set<QName> types = new HashSet<QName>(1, 1.0f);
        types.add(createQName(type));
        List<ChildAssociationRef> refs = this.nodeService.getChildAssocs(this.nodeRef, types);
        Object[] nodes = new Object[refs.size()];
        for (int i=0; i<nodes.length; i++)
        {
            ChildAssociationRef ref = refs.get(i);
            nodes[i] = newInstance(ref.getChildRef(), this.services, this.scope);
        }
        return Context.getCurrentContext().newArray(this.scope, nodes);
    }
    
    /**
     * Return the parent associations to this Node. As a Map of assoc name to a JavaScript array of Nodes.
     * The Map returned implements the Scriptable interface to allow access to the assoc arrays via JavaScript
     * associative array access. This means associations of this node can be access thus:
     * <code>node.parentAssocs["contains"][0]</code>
     * 
     * @return parent associations as a Map of assoc name to a JavaScript array of Nodes.
     */
    @SuppressWarnings("unchecked")
    public Map<String, Object> getParentAssocs()
    {
        if (this.parentAssocs == null)
        {
            // this Map implements the Scriptable interface for native JS syntax property access
            this.parentAssocs = new ScriptableQNameMap<String, Object>(this);
            
            // get the list of child assoc nodes for each association type
            List<ChildAssociationRef> refs = this.nodeService.getParentAssocs(nodeRef);
            for (ChildAssociationRef ref : refs)
            {
                String qname = ref.getTypeQName().toString();
                List<ScriptNode> nodes = (List<ScriptNode>)this.parentAssocs.get(qname);
                if (nodes == null)
                {
                    // first access of the list for this qname
                    nodes = new ArrayList<ScriptNode>(4);
                    this.parentAssocs.put(ref.getTypeQName().toString(), nodes);
                }
                nodes.add(newInstance(ref.getParentRef(), this.services, this.scope));
            }
            
            // convert each Node list into a JavaScript array object
            for (String qname : this.parentAssocs.keySet())
            {
                List<ScriptNode> nodes = (List<ScriptNode>)this.parentAssocs.get(qname);
                Object[] objs = nodes.toArray(new Object[nodes.size()]);
                this.parentAssocs.put(qname, Context.getCurrentContext().newArray(this.scope, objs));
            }
        }
        
        return this.parentAssocs;
    }
    
    public Map<String, Object> getParentAssociations()
    {
        return getParentAssocs();
    }
    
    /**
     * Return all the properties known about this node. The Map returned implements the Scriptable interface to
     * allow access to the properties via JavaScript associative array access. This means properties of a node can
     * be access thus: <code>node.properties["name"]</code>
     * 
     * @return Map of properties for this Node.
     */
    @SuppressWarnings("unchecked")
    public Map<String, Object> getProperties()
    {
        if (this.properties == null)
        {
            // this Map implements the Scriptable interface for native JS syntax property access
            // this impl of the QNameMap is capable of creating ScriptContentData on demand for 'cm:content'
            // properties that have not been initialised - see AR-1673.
            this.properties = new ContentAwareScriptableQNameMap<String, Serializable>(this, this.services);
            
            Map<QName, Serializable> props = null;
            if (nodeInfo != null)
            {
                props = nodeInfo.getProperties();
            }
            else
            {
                props = this.nodeService.getProperties(this.nodeRef);
            }
            
            for (QName qname : props.keySet())
            {
                Serializable propValue = props.get(qname);
                
                // perform the conversion to a script safe value and store
                this.properties.put(qname.toString(), getValueConverter().convertValueForScript(qname, propValue));
            }
        }
        
        return this.properties;
    }

    /**
     * Return all the property names defined for this node's type as an array of short QNames.
     * 
     * @return Array of property names for this node's type.
     */
    public Scriptable getTypePropertyNames()
    {
        return getTypePropertyNames(true);
    }

    /**
     * Return all the property names defined for this node's type as an array.
     * 
     * @param useShortQNames if true short-form qnames will be returned, else long-form.
     * @return Array of property names for this node's type.
     */
    public Scriptable getTypePropertyNames(boolean useShortQNames)
    {
        Set<QName> props = this.services.getDictionaryService().getClass(this.getQNameType()).getProperties().keySet();
        Object[] result = new Object[props.size()];
        int count = 0;
        for (QName qname : props)
        {
            result[count++] = useShortQNames ? getShortQName(qname).toString() : qname.toString();
        }
        return Context.getCurrentContext().newArray(this.scope, result);
    }

    /**
     * Return all the property names defined for this node as an array.
     * 
     * @param useShortQNames if true short-form qnames will be returned, else long-form.
     * @return Array of property names for this node type and optionally parent properties.
     */
    public Scriptable getPropertyNames(boolean useShortQNames)
    {
        Set<QName> props = this.nodeService.getProperties(this.nodeRef).keySet();
        Object[] result = new Object[props.size()];
        int count = 0;
        for (QName qname : props)
        {
            result[count++] = useShortQNames ? getShortQName(qname).toString() : qname.toString();
        }
        return Context.getCurrentContext().newArray(this.scope, result);
    }

    /**
     * @return true if this Node is a container (i.e. a folder)
     */
    public boolean getIsContainer()
    {
        if (isContainer == null)
        {
            DictionaryService dd = this.services.getDictionaryService();
            isContainer = Boolean.valueOf((dd.isSubClass(getQNameType(), ContentModel.TYPE_FOLDER) == true &&
                    dd.isSubClass(getQNameType(), ContentModel.TYPE_SYSTEM_FOLDER) == false));
        }
        
        return isContainer.booleanValue();
    }
    
    /**
     * @return true if this Node is a Document (i.e. with content)
     */
    public boolean getIsDocument()
    {
        if (isDocument == null)
        {
            DictionaryService dd = this.services.getDictionaryService();
            isDocument = Boolean.valueOf(dd.isSubClass(getQNameType(), ContentModel.TYPE_CONTENT));
        }
        
        return isDocument.booleanValue();
    }
    
    /**
     * @return true if this Node is a Link to a Container (i.e. a folderlink)
     */
    public boolean getIsLinkToContainer()
    {
        if (isLinkToContainer == null)
        {
            DictionaryService dd = this.services.getDictionaryService();
            isLinkToContainer = Boolean.valueOf(dd.isSubClass(getQNameType(), ApplicationModel.TYPE_FOLDERLINK));
        }
        
        return isLinkToContainer.booleanValue();
    }

    /**
     * @return true if this Node is a Link to a Document (i.e. a filelink)
     */
    public boolean getIsLinkToDocument()
    {
        if (isLinkToDocument == null)
        {
            DictionaryService dd = this.services.getDictionaryService();
            isLinkToDocument = Boolean.valueOf(dd.isSubClass(getQNameType(), ApplicationModel.TYPE_FILELINK));
        }
        
        return isLinkToDocument.booleanValue();
    }
    
    /**
     * @return true if the Node is a Category
     */
    public boolean getIsCategory()
    {
        // this valid is overriden by the CategoryNode sub-class
        return false;
    }
    
    /**
     * @return The list of aspects applied to this node
     */
    public Set<QName> getAspectsSet()
    {
        if (this.aspects == null)
        {
            this.aspects = this.nodeService.getAspects(this.nodeRef);
        }
        
        return this.aspects;
    }
    
    /**
     * @return The array of aspects applied to this node
     */
    public Scriptable getAspects()
    {
        Set<QName> aspects = getAspectsSet();
        Object[] result = new Object[aspects.size()];
        int count = 0;
        for (QName qname : aspects)
        {
            result[count++] = qname.toString();
        }
        return Context.getCurrentContext().newArray(this.scope, result);
    }
    
    /**
     * @param aspect  The aspect name to test for (fully qualified or short-name form)
     * @return true if the node has the aspect false otherwise
     */
    public boolean hasAspect(String aspect)
    {
        return getAspectsSet().contains(createQName(aspect));
    }
    
    /**
     * @param type  The qname type to test this object against (fully qualified or short-name form)
     * @return true if this Node is a sub-type of the specified class (or itself of that class)
     */
    public boolean isSubType(String type)
    {
        ParameterCheck.mandatoryString("Type", type);
        
        QName qnameType = createQName(type);
        
        return this.services.getDictionaryService().isSubClass(getQNameType(), qnameType);
    }
    
    /**
     * @return QName path to this node. This can be used for Lucene PATH: style queries
     */
    public String getQnamePath()
    {
        return this.services.getNodeService().getPath(getNodeRef()).toPrefixString(this.services.getNamespaceService());
    }

    /**
     * @return Display path to this node
     */
    public String getDisplayPath()
    {
        if (displayPath == null)
        {
            displayPath = this.nodeService.getPath(this.nodeRef).toDisplayPath(
                    this.nodeService, this.services.getPermissionService());
        }
        
        return displayPath;
    }
    
    /**
     * @return the small icon image for this node
     */
    public String getIcon16()
    {
        return "/images/filetypes/_default.gif";
    }
    
    /**
     * @return the large icon image for this node
     */
    public String getIcon32()
    {
        return "/images/filetypes32/_default.gif";
    }
    
    /**
     * @return true if the node is currently locked
     */
    public boolean getIsLocked()
    {
        boolean locked = false;
        
        if (getAspectsSet().contains(ContentModel.ASPECT_LOCKABLE))
        {
            LockStatus lockStatus = this.services.getLockService().getLockStatus(this.nodeRef);
            if (lockStatus == LockStatus.LOCKED || lockStatus == LockStatus.LOCK_OWNER)
            {
                locked = true;
            }
        }
        
        return locked;
    }
    
    /**
     * @return the primary parent node
     */
    public ScriptNode getParent()
    {
        if (parent == null)
        {
            NodeRef parentRef = getPrimaryParentAssoc().getParentRef();
            // handle root node (no parent!)
            if (parentRef != null)
            {
                parent = newInstance(parentRef, this.services, this.scope);
            }
        }
        
        return parent;
    }
    
    /**
     * @return all parent nodes
     */
    public Scriptable getParents()
    {
        List<ChildAssociationRef> parentRefs = this.nodeService.getParentAssocs(this.nodeRef);
        Object[] parents = new Object[parentRefs.size()];
        for (int i = 0; i < parentRefs.size(); i++)
        {
            NodeRef ref = parentRefs.get(i).getParentRef();
            parents[i] = newInstance(ref, this.services, this.scope);
        }
        return Context.getCurrentContext().newArray(this.scope, parents);
    }
    
    /**
     * @return the primary parent association so we can get at the association QName and the association type QName.
     */
    public ChildAssociationRef getPrimaryParentAssoc()
    {
        if (primaryParentAssoc == null)
        {
            primaryParentAssoc = this.nodeService.getPrimaryParent(nodeRef);
        }
        return primaryParentAssoc;
    }
    
    
    // ------------------------------------------------------------------------------
    // Content API
    
    /**
     * @return the content String for this node from the default content property (@see ContentModel.PROP_CONTENT)
     */
    public String getContent()
    {
        String content = "";
        
        ScriptContentData contentData = (ScriptContentData)getProperties().get(ContentModel.PROP_CONTENT);
        if (contentData != null)
        {
            content = contentData.getContent();
        }
        
        return content;
    }
    
    /**
     * Set the content for this node
     * 
     * @param content    Content string to set
     */
    public void setContent(String content)
    {
        ScriptContentData contentData = (ScriptContentData)getProperties().get(ContentModel.PROP_CONTENT);
        if (contentData != null)
        {
            contentData.setContent(content);
        }
    }
    
    /**
     * @return For a content document, this method returns the URL to the content stream for the default content
     *         property (@see ContentModel.PROP_CONTENT)
     *         <p>
     *         For a container node, this method return the URL to browse to the folder in the web-client
     */
    public String getUrl()
    {
        if (getIsDocument() == true)
        {
            return MessageFormat.format(CONTENT_DEFAULT_URL, new Object[] { nodeRef.getStoreRef().getProtocol(),
                    nodeRef.getStoreRef().getIdentifier(), nodeRef.getId(),
                    URLEncoder.encode(getName())});
        }
        else
        {
            return MessageFormat.format(FOLDER_BROWSE_URL, new Object[] { nodeRef.getStoreRef().getProtocol(),
                    nodeRef.getStoreRef().getIdentifier(), nodeRef.getId() });
        }
    }
    
    /**
     * @return For a content document, this method returns the download URL to the content for
     *         the default content property (@see ContentModel.PROP_CONTENT)
     *         <p>
     *         For a container node, this method returns an empty string
     */
    public String getDownloadUrl()
    {
        if (getIsDocument() == true)
        {
           return MessageFormat.format(CONTENT_DOWNLOAD_URL, new Object[] {
                    nodeRef.getStoreRef().getProtocol(),
                    nodeRef.getStoreRef().getIdentifier(),
                    nodeRef.getId(),
                    URLEncoder.encode(getName()) });
        }
        else
        {
            return "";
        }
    }

    public String jsGet_downloadUrl()
    {
        return getDownloadUrl();
    }
    
    /**
     * @return The WebDav cm:name based path to the content for the default content property
     *         (@see ContentModel.PROP_CONTENT)
     */
    public String getWebdavUrl()
    {
        try
        {
            if (getIsContainer() || getIsDocument())
            {
                List<FileInfo> paths = this.services.getFileFolderService().getNamePath(null, getNodeRef());
                
                // build up the webdav url
                StringBuilder path = new StringBuilder(128);
                path.append("/webdav");
                
                // build up the path skipping the first path as it is the root folder
                for (int i=1; i<paths.size(); i++)
                {
                    path.append("/")
                        .append(URLEncoder.encode(paths.get(i).getName()));
                }
                return path.toString();
            }
        }
        catch (FileNotFoundException nodeErr)
        {
            // cannot build path if file no longer exists
            return "";
        }
        return "";
    }

    /**
     * @return The mimetype encoding for content attached to the node from the default content property
     *         (@see ContentModel.PROP_CONTENT)
     */
    public String getMimetype()
    {
        String mimetype = null;
        ScriptContentData content = (ScriptContentData) this.getProperties().get(ContentModel.PROP_CONTENT);
        if (content != null)
        {
            mimetype = content.getMimetype();
        }
        
        return mimetype;
    }
    
    /**
     * Set the mimetype encoding for the content attached to the node from the default content property
     * (@see ContentModel.PROP_CONTENT)
     * 
     * @param mimetype   Mimetype to set
     */
    public void setMimetype(String mimetype)
    {
        ScriptContentData content = (ScriptContentData) this.getProperties().get(ContentModel.PROP_CONTENT);
        if (content != null)
        {
            content.setMimetype(mimetype);
        }
    }
    
    /**
     * @return The size in bytes of the content attached to the node from the default content property
     *         (@see ContentModel.PROP_CONTENT)
     */
    public long getSize()
    {
        long size = 0;
        ScriptContentData content = (ScriptContentData) this.getProperties().get(ContentModel.PROP_CONTENT);
        if (content != null)
        {
            size = content.getSize();
        }
        
        return size;
    }
    
    
    // ------------------------------------------------------------------------------
    // Security API
    
    /**
     * Return true if the user has the specified permission on the node.
     * <p>
     * The default permissions are found in <code>org.alfresco.service.cmr.security.PermissionService</code>.
     * Most commonly used are "Write", "Delete" and "AddChildren".
     * 
     * @param permission as found in <code>org.alfresco.service.cmr.security.PermissionService</code>
     * @return true if the user has the specified permission on the node.
     */
    public boolean hasPermission(String permission)
    {
        ParameterCheck.mandatory("Permission Name", permission);
        
        boolean allowed = false;
        
        if (permission != null && permission.length() != 0)
        {
            AccessStatus status = this.services.getPermissionService().hasPermission(this.nodeRef, permission);
            allowed = (AccessStatus.ALLOWED == status);
        }
        
        return allowed;
    }
    
    /**
     * @return Array of permissions applied to this Node, including inherited.
     *         Strings returned are of the format [ALLOWED|DENIED];[USERNAME|GROUPNAME];PERMISSION for example
     *         ALLOWED;kevinr;Consumer so can be easily tokenized on the ';' character.
     */
    public Scriptable getPermissions()
    {
        return Context.getCurrentContext().newArray(this.scope, retrieveAllSetPermissions(false, false));
    }
    
    /**
     * @return Array of permissions applied directly to this Node (does not include inherited).
     *         Strings returned are of the format [ALLOWED|DENIED];[USERNAME|GROUPNAME];PERMISSION for example
     *         ALLOWED;kevinr;Consumer so can be easily tokenized on the ';' character.
     */
    public Scriptable getDirectPermissions()
    {
        return Context.getCurrentContext().newArray(this.scope, retrieveAllSetPermissions(true, false));
    }
    
    /**
     * @return Array of all permissions applied to this Node, including inherited.
     *         Strings returned are of the format [ALLOWED|DENIED];[USERNAME|GROUPNAME];PERMISSION;[INHERITED|DIRECT]
     *         for example: ALLOWED;kevinr;Consumer;DIRECT so can be easily tokenized on the ';' character.
     */
    public Scriptable getFullPermissions()
    {
        return Context.getCurrentContext().newArray(this.scope, retrieveAllSetPermissions(false, true));
    }
    
    /**
     * Helper to construct the response object for the various getPermissions() calls.
     * 
     * @param direct    True to only retrieve direct permissions, false to get inherited also
     * @param full      True to retrieve full data string with [INHERITED|DIRECT] element
     *                  This exists to maintain backward compatibility with existing permission APIs.
     * 
     * @return Object[] of packed permission strings.
     */
    private Object[] retrieveAllSetPermissions(boolean direct, boolean full)
    {
        Set<AccessPermission> acls = this.services.getPermissionService().getAllSetPermissions(getNodeRef());
        List<Object> permissions = new ArrayList<Object>(acls.size());
        for (AccessPermission permission : acls)
        {
            if (!direct || permission.isSetDirectly())
            {
                StringBuilder buf = new StringBuilder(64);
                buf.append(permission.getAccessStatus())
                    .append(';')
                    .append(permission.getAuthority())
                    .append(';')
                    .append(permission.getPermission());
                if (full)
                {
                    buf.append(';').append(permission.isSetDirectly() ? "DIRECT" : "INHERITED");
                }
                permissions.add(buf.toString());
            }
        }
        return (Object[])permissions.toArray(new Object[permissions.size()]);
    }
    
    /**
     * @return Array of settable permissions for this Node
     */
    public Scriptable getSettablePermissions()
    {
        Set<String> permissions = this.services.getPermissionService().getSettablePermissions(getNodeRef());
        Object[] result = permissions.toArray(new Object[0]);
        return Context.getCurrentContext().newArray(this.scope, result);
    }
    
    /**
     * @return true if the node inherits permissions from the parent node, false otherwise
     */
    public boolean inheritsPermissions()
    {
        return this.services.getPermissionService().getInheritParentPermissions(this.nodeRef);
    }
    
    /**
     * Set whether this node should inherit permissions from the parent node.
     * 
     * @param inherit True to inherit parent permissions, false otherwise.
     */
    public void setInheritsPermissions(boolean inherit)
    {
        this.services.getPermissionService().setInheritParentPermissions(this.nodeRef, inherit);
    }
    
    /**
     * Apply a permission for ALL users to the node.
     * 
     * @param permission Permission to apply
     * @see org.alfresco.service.cmr.security.PermissionService
     */
    public void setPermission(String permission)
    {
        ParameterCheck.mandatoryString("Permission Name", permission);
        this.services.getPermissionService().setPermission(
                this.nodeRef, PermissionService.ALL_AUTHORITIES, permission, true);
    }
    
    /**
     * Apply a permission for the specified authority (e.g. username or group) to the node.
     * 
     * @param permission Permission to apply @see org.alfresco.service.cmr.security.PermissionService
     * @param authority Authority (generally a username or group name) to apply the permission for
     */
    public void setPermission(String permission, String authority)
    {
        ParameterCheck.mandatoryString("Permission Name", permission);
        ParameterCheck.mandatoryString("Authority", authority);
        this.services.getPermissionService().setPermission(
                this.nodeRef, authority, permission, true);
    }
    
    /**
     * Remove a permission for ALL user from the node.
     * 
     * @param permission Permission to remove @see org.alfresco.service.cmr.security.PermissionService
     */
    public void removePermission(String permission)
    {
        ParameterCheck.mandatoryString("Permission Name", permission);
        this.services.getPermissionService().deletePermission(
                this.nodeRef, PermissionService.ALL_AUTHORITIES, permission);
    }
    
    /**
     * Remove a permission for the specified authority (e.g. username or group) from the node.
     * 
     * @param permission Permission to remove @see org.alfresco.service.cmr.security.PermissionService
     * @param authority  Authority (generally a username or group name) to apply the permission for
     */
    public void removePermission(String permission, String authority)
    {
        ParameterCheck.mandatoryString("Permission Name", permission);
        ParameterCheck.mandatoryString("Authority", authority);
        this.services.getPermissionService().deletePermission(
                this.nodeRef, authority, permission);
    }
    
    
    // ------------------------------------------------------------------------------
    // Ownership API
    
    /**
     * Set the owner of the node
     */
    public void setOwner(String userId)
    {
        this.services.getOwnableService().setOwner(this.nodeRef, userId);
    }
    
    /**
     * Take ownership of the node.
     */
    public void takeOwnership()
    {
        this.services.getOwnableService().takeOwnership(this.nodeRef);
    }
    
    /**
     * Get the owner of the node.
     * 
     * @return
     */
    public String getOwner()
    {
        return this.services.getOwnableService().getOwner(this.nodeRef);
    }
    
    
    // ------------------------------------------------------------------------------
    // Create and Modify API
    
    /**
     * Persist the modified properties of this Node.
     */
    public void save()
    {
        // persist properties back to the node in the DB
        Map<QName, Serializable> props = new HashMap<QName, Serializable>(getProperties().size());
        for (String key : this.properties.keySet())
        {
            Serializable value = (Serializable) this.properties.get(key);
            
            // perform the conversion from script wrapper object to repo serializable values
            value = getValueConverter().convertValueForRepo(value);
            
            props.put(createQName(key), value);
        }
        this.nodeService.setProperties(this.nodeRef, props);
    }
    
    /**
     * Re-sets the type of the node. Can be called in order specialise a node to a sub-type. This should be used
     * with caution since calling it changes the type of the node and thus* implies a different set of aspects,
     * properties and associations. It is the responsibility of the caller to ensure that the node is in a
     * approriate state after changing the type.
     * 
     * @param type Type to specialize the node
     * 
     * @return true if successful, false otherwise
     */
    public boolean specializeType(String type)
    {
        ParameterCheck.mandatoryString("Type", type);
        
        QName qnameType = createQName(type);
        
        // Ensure that we are performing a specialise
        if (getQNameType().equals(qnameType) == false &&
                this.services.getDictionaryService().isSubClass(qnameType, getQNameType()) == true)
        {
            // Specialise the type of the node
            this.nodeService.setType(this.nodeRef, qnameType);
            this.type = qnameType;
            
            return true;
        }
        return false;
    }
    
    /**
     * Create a new File (cm:content) node as a child of this node.
     * <p>
     * Once created the file should have content set using the <code>content</code> property.
     * 
     * @param name Name of the file to create
     * 
     * @return Newly created Node or null if failed to create.
     */
    public ScriptNode createFile(String name)
    {
        return createFile(name, null);
    }
    
    /**
     * Create a new File (cm:content) node as a child of this node.
     * <p>
     * Once created the file should have content set using the <code>content</code> property.
     * 
     * @param name Name of the file to create
     * @param type Type of the file to create (if null, defaults to ContentModel.TYPE_CONTENT) 
     * 
     * @return Newly created Node or null if failed to create.
     */
    public ScriptNode createFile(String name, String type)
    {
        ParameterCheck.mandatoryString("Node Name", name);
        
        FileInfo fileInfo = this.services.getFileFolderService().create(
                this.nodeRef, name, type == null ? ContentModel.TYPE_CONTENT : createQName(type));
        
        reset();
        
        ScriptNode file = newInstance(fileInfo.getNodeRef(), this.services, this.scope);
        file.setMimetype(this.services.getMimetypeService().guessMimetype(name));
        
        return file;
    }
    
    /**
     * Create a new folder (cm:folder) node as a child of this node.
     * 
     * @param name Name of the folder to create
     * 
     * @return Newly created Node or null if failed to create.
     */
    public ScriptNode createFolder(String name)
    {
        return createFolder(name, null);
    }

    /**
     * Create a new folder (cm:folder) node as a child of this node.
     * 
     * @param name Name of the folder to create
     * @param type Type of the folder to create (if null, defaults to ContentModel.TYPE_FOLDER)
     * 
     * @return Newly created Node or null if failed to create.
     */
    public ScriptNode createFolder(String name, String type)
    {
        ParameterCheck.mandatoryString("Node Name", name);
        
        FileInfo fileInfo = this.services.getFileFolderService().create(
                this.nodeRef, name, type == null ? ContentModel.TYPE_FOLDER : createQName(type));
        
        reset();
        
        return newInstance(fileInfo.getNodeRef(), this.services, this.scope);
    }

    /**
     * Create a new Node of the specified type as a child of this node.
     * 
     * @param name Name of the node to create (can be null for a node without a 'cm:name' property)
     * @param type QName type (fully qualified or short form such as 'cm:content')
     * 
     * @return Newly created Node or null if failed to create.
     */
    public ScriptNode createNode(String name, String type)
    {
        return createNode(name, type, null, ContentModel.ASSOC_CONTAINS.toString());
    }
    
    /**
     * Create a new Node of the specified type as a child of this node.
     * 
     * @param name Name of the node to create (can be null for a node without a 'cm:name' property)
     * @param type QName type (fully qualified or short form such as 'cm:content')
     * @param assocType QName of the child association type (fully qualified or short form e.g. 'cm:contains')
     * 
     * @return Newly created Node or null if failed to create.
     */
    public ScriptNode createNode(String name, String type, String assocType)
    {
        return createNode(name, type, null, assocType);
    }
    
    /**
     * Create a new Node of the specified type as a child of this node.
     * 
     * @param name Name of the node to create (can be null for a node without a 'cm:name' property)
     * @param type QName type (fully qualified or short form such as 'cm:content')
     * @param properties Associative array of the default properties for the node.
     * 
     * @return Newly created Node or null if failed to create.
     */
    public ScriptNode createNode(String name, String type, Object properties)
    {
        return createNode(name, type, properties, ContentModel.ASSOC_CONTAINS.toString());
    }
    
    /**
     * Create a new Node of the specified type as a child of this node.
     * 
     * @param name Name of the node to create (can be null for a node without a 'cm:name' property)
     * @param type QName type (fully qualified or short form such as 'cm:content')
     * @param properties Associative array of the default properties for the node.
     * @param assocType QName of the child association type (fully qualified or short form e.g. 'cm:contains')
     * 
     * @return Newly created Node or null if failed to create.
     */
    public ScriptNode createNode(String name, String type, Object properties, String assocType)
    {
        return createNode(name, type, properties, assocType, null);
    }
    
    /**
     * Create a new Node of the specified type as a child of this node.
     * 
     * @param name Name of the node to create (can be null for a node without a 'cm:name' property)
     * @param type QName type (fully qualified or short form such as 'cm:content')
     * @param properties Associative array of the default properties for the node.
     * @param assocType QName of the child association type (fully qualified or short form e.g. 'cm:contains')
     * @param assocName QName of the child association name (fully qualified or short form e.g. 'fm:discussion')
     * 
     * @return Newly created Node or null if failed to create.
     */
    public ScriptNode createNode(String name, String type, Object properties, String assocType, String assocName)
    {
        ParameterCheck.mandatoryString("Node Type", type);
        ParameterCheck.mandatoryString("Association Type", assocType);
        
        Map<QName, Serializable> props = null;
        
        if (properties instanceof ScriptableObject)
        {
            props = new HashMap<QName, Serializable>(4, 1.0f);
            extractScriptableProperties((ScriptableObject)properties, props);
        }
        
        if (name != null)
        {
            if (props == null) props = new HashMap<QName, Serializable>(1, 1.0f);
            props.put(ContentModel.PROP_NAME, name);
        }
        else
        {
            // set name for the assoc local name
            name = GUID.generate();
        }
        
        ChildAssociationRef childAssocRef = this.nodeService.createNode(
                this.nodeRef,
                createQName(assocType),
                assocName == null ?
                     QName.createQName(NamespaceService.CONTENT_MODEL_1_0_URI, QName.createValidLocalName(name)) :
                     createQName(assocName),
                createQName(type),
                props);
        
        reset();
        
        return newInstance(childAssocRef.getChildRef(), this.services, this.scope);
    }
    
    /**
     * Creates a new secondary association between the current node and the specified child node.   
     * The association is given the same name as the child node's primary association.
     * 
     * @param node  node to add as a child of this node
     */
    public void addNode(ScriptNode node)
    {
        ParameterCheck.mandatory("node", node);
        ChildAssociationRef childAssocRef = this.nodeService.getPrimaryParent(node.nodeRef);
        nodeService.addChild(this.nodeRef, node.nodeRef, ContentModel.ASSOC_CONTAINS, childAssocRef.getQName());
        reset();
    }

    /**
     * Remove an existing child node of this node.
     *
     * Severs all parent-child relationships between two nodes.
     * <p>
     * The child node will be cascade deleted if one of the associations was the
     * primary association, i.e. the one with which the child node was created.
     * 
     * @param node  child node to remove
     */
    public void removeNode(ScriptNode node)
    {
        ParameterCheck.mandatory("node", node);
        nodeService.removeChild(this.nodeRef, node.nodeRef);
        reset();
    }

    /**
     * Create an association between this node and the specified target node.
     * 
     * @param target        Destination node for the association
     * @param assocType     Association type qname (short form or fully qualified)
     */
    public Association createAssociation(ScriptNode target, String assocType)
    {
        ParameterCheck.mandatory("Target", target);
        ParameterCheck.mandatoryString("Association Type Name", assocType);
        
        AssociationRef assocRef = this.nodeService.createAssociation(this.nodeRef, target.nodeRef, createQName(assocType));
        reset();
        return new Association(this.services, assocRef);
    }
    
    /**
     * Remove an association between this node and the specified target node.
     * 
     * @param target        Destination node on the end of the association
     * @param assocType     Association type qname (short form or fully qualified)
     */
    public void removeAssociation(ScriptNode target, String assocType)
    {
        ParameterCheck.mandatory("Target", target);
        ParameterCheck.mandatoryString("Association Type Name", assocType);
        
        this.nodeService.removeAssociation(this.nodeRef, target.nodeRef, createQName(assocType));
        reset();
    }
    
    /**
     * Remove this node. Any references to this Node or its NodeRef should be discarded!
     */
    public boolean remove()
    {
        boolean success = false;
        
        if (nodeService.exists(this.nodeRef))
        {
            this.nodeService.deleteNode(this.nodeRef);
            success = true;
        }
        
        reset();
        
        return success;
    }
    
    /**
     * Copy this Node to a new parent destination. Note that children of the source Node are not copied.
     * 
     * @param destination   Node
     * 
     * @return The newly copied Node instance or null if failed to copy.
     */
    public ScriptNode copy(ScriptNode destination)
    {
        return copy(destination, false);
    }
    
    /**
     * Copy this Node and potentially all child nodes to a new parent destination.
     * 
     * @param destination   Node
     * @param deepCopy      True for a deep copy, false otherwise.
     * 
     * @return The newly copied Node instance or null if failed to copy.
     */
    public ScriptNode copy(ScriptNode destination, boolean deepCopy)
    {
        ParameterCheck.mandatory("Destination Node", destination);
        
        ScriptNode copy = null;
        
        if (destination.getNodeRef().getStoreRef().getProtocol().equals(StoreRef.PROTOCOL_WORKSPACE))
        {
            NodeRef copyRef = this.services.getCopyService().copyAndRename(this.nodeRef, destination.getNodeRef(),
                    ContentModel.ASSOC_CONTAINS, null, deepCopy);
            copy = newInstance(copyRef, this.services, this.scope);
        }
        else
        {
            // NOTE: the deepCopy flag is not respected for this copy mechanism
            copy = getCrossRepositoryCopyHelper().copy(this, destination, getName());
        }
        
        return copy;
    }
    
    /**
     * Move this Node to a new parent destination.
     * 
     * @param destination   Node
     * 
     * @return true on successful move, false on failure to move.
     */
    public boolean move(ScriptNode destination)
    {
        ParameterCheck.mandatory("Destination Node", destination);
        
        this.primaryParentAssoc = this.nodeService.moveNode(this.nodeRef, destination.getNodeRef(),
                ContentModel.ASSOC_CONTAINS, getPrimaryParentAssoc().getQName());
        
        // reset cached values
        reset();
        
        return true;
    }
    
    /**
     * Move this Node from specified parent to a new parent destination.
     * 
     * @param source Node
     * @param destination Node
     * @return true on successful move, false on failure to move.
     */
    public boolean move(ScriptNode source, ScriptNode destination)
    {
        ParameterCheck.mandatory("Destination Node", destination);

        if (source == null)
        {
            return move(destination);
        }
        else
        {
            try
            {
                this.services.getFileFolderService().moveFrom(this.nodeRef, source.getNodeRef(), destination.getNodeRef(), null);
            }
            catch (Exception e)
            {
                throw new ScriptException("Can't move node", e);
            }
        }

        // reset cached values
        reset();

        return true;
    }
    
    /**
     * Add an aspect to the Node. As no properties are provided in this call, it can only be used to add aspects that do not require any mandatory properties.
     * 
     * @param type    Type name of the aspect to add
     * 
     * @return true if the aspect was added successfully, false if an error occured.
     */
    public boolean addAspect(String type)
    {
        return addAspect(type, null);
    }
    
    /**
     * Add an aspect to the Node.
     * 
     * @param type    Type name of the aspect to add
     * @param props   ScriptableObject (generally an assocative array) providing the named properties for the aspect
     *                - any mandatory properties for the aspect must be provided!
     *                
     * @return true if the aspect was added successfully, false if an error occured.
     */
    public boolean addAspect(String type, Object props)
    {
        ParameterCheck.mandatoryString("Aspect Type", type);
        
        Map<QName, Serializable> aspectProps = null;
        if (props instanceof ScriptableObject)
        {
            aspectProps = new HashMap<QName, Serializable>(4, 1.0f);
            extractScriptableProperties((ScriptableObject)props, aspectProps);
        }
        QName aspectQName = createQName(type);
        this.nodeService.addAspect(this.nodeRef, aspectQName, aspectProps);
        
        // reset the relevant cached node members
        reset();
        
        return true;
    }

    /**
     * Extract a map of properties from a scriptable object (generally an associative array)
     * 
     * @param scriptable    The scriptable object to extract name/value pairs from.
     * @param map           The map to add the converted name/value pairs to.
     */
    private void extractScriptableProperties(ScriptableObject scriptable, Map<QName, Serializable> map)
    {
        // we need to get all the keys to the properties provided
        // and convert them to a Map of QName to Serializable objects
        Object[] propIds = scriptable.getIds();
        for (int i = 0; i < propIds.length; i++)
        {
            // work on each key in turn
            Object propId = propIds[i];
            
            // we are only interested in keys that are formed of Strings i.e. QName.toString()
            if (propId instanceof String)
            {
                // get the value out for the specified key - it must be Serializable
                String key = (String)propId;
                Object value = scriptable.get(key, scriptable);
                if (value instanceof Serializable)
                {
                    value = getValueConverter().convertValueForRepo((Serializable)value);
                    map.put(createQName(key), (Serializable)value);
                }
            }
        }
    }
    
    /**
     * Remove aspect from the node.
     * 
     * @param type  the aspect type
     * 
     * @return      true if successful, false otherwise
     */
    public boolean removeAspect(String type)
    {
        ParameterCheck.mandatoryString("Aspect Type", type);
        
        QName aspectQName = createQName(type);
        this.nodeService.removeAspect(this.nodeRef, aspectQName);
        
        // reset the relevant cached node members
        reset();
        
        return true;
    }
    
    
    // ------------------------------------------------------------------------------
    // Checkout/Checkin Services

    /**
     * Ensures that this document has the cm:versionable aspect applied to it,
     *  and that it has the initial version in the version store.
     * Calling this on a versioned node with a version store entry will have 
     *  no effect.
     * Calling this on a newly uploaded share node will have versioning enabled
     *  for it (Share currently does lazy versioning to improve performance of
     *  documents that are uploaded but never edited, and multi upload performance).
     * 
     * @param autoVersion If the cm:versionable aspect is applied, should auto versioning be requested?
     * @param autoVersionProps If the cm:versionable aspect is applied, should auto versioning of properties be requested?
     */
    public void ensureVersioningEnabled(boolean autoVersion, boolean autoVersionProps)
    {
        Map<QName, Serializable> props = new HashMap<QName, Serializable>(1, 1.0f);
        props.put(ContentModel.PROP_AUTO_VERSION, autoVersion);
        props.put(ContentModel.PROP_AUTO_VERSION_PROPS, autoVersionProps);
        
        this.services.getVersionService().ensureVersioningEnabled(nodeRef, props);
    }
    
    /**
     * Create a version of this document.  Note: this will add the cm:versionable aspect.
     * 
     * @param history       Version history note
     * @param majorVersion  True to save as a major version increment, false for minor version.
     */
    public ScriptVersion createVersion(String history, boolean majorVersion)
    {
        Map<String, Serializable> props = new HashMap<String, Serializable>(2, 1.0f);
        props.put(Version.PROP_DESCRIPTION, history);
        props.put(VersionModel.PROP_VERSION_TYPE, majorVersion ? VersionType.MAJOR : VersionType.MINOR);
        ScriptVersion version = new ScriptVersion(this.services.getVersionService().createVersion(this.nodeRef, props), this.services, this.scope);
        this.versions = null;
        return version;
    }

    /**
     * Determines if this node is versioned
     * 
     * @return  true => is versioned
     */
    public boolean getIsVersioned()
    {
        return this.nodeService.hasAspect(this.nodeRef, ContentModel.ASPECT_VERSIONABLE);
    }
    
    /**
     * Gets the version history
     * 
     * @return  version history
     */
    public Scriptable getVersionHistory()
    {
        if (this.versions == null && getIsVersioned())
        {
            VersionHistory history = this.services.getVersionService().getVersionHistory(this.nodeRef);
            if (history != null)
            {
                Collection<Version> allVersions = history.getAllVersions();
                Object[] versions = new Object[allVersions.size()];
                int i = 0;
                for (Version version : allVersions)
                {
                    versions[i++] = new ScriptVersion(version, this.services, this.scope);
                }
                this.versions = Context.getCurrentContext().newArray(this.scope, versions);
            }
        }
        return this.versions;
    }
    
    /**
     * Gets the version of this node specified by version label
     * 
     * @param versionLabel  version label
     * @return  version of node, or null if node is not versioned, or label does not exist
     */
    public ScriptVersion getVersion(String versionLabel)
    {
        if (!getIsVersioned())
        {
            return null;
        }
        VersionHistory history = this.services.getVersionService().getVersionHistory(this.nodeRef);
        Version version = history.getVersion(versionLabel);
        if (version == null)
        {
            return null;
        }
        return new ScriptVersion(version, this.services, this.scope); 
    }
    
    /**
     * Perform a check-out of this document into the current parent space.
     * 
     * @return the working copy Node for the checked out document
     */
    public ScriptNode checkout()
    {
        NodeRef workingCopyRef = this.services.getCheckOutCheckInService().checkout(this.nodeRef);
        ScriptNode workingCopy = newInstance(workingCopyRef, this.services, this.scope);
        
        // reset the aspect and properties as checking out a document causes changes
        this.properties = null;
        this.aspects = null;
        
        return workingCopy;
    }
    
    /**
     * Performs a check-out of this document for the purposes of an upload
     * 
     * @return
     */
    public ScriptNode checkoutForUpload()
    {
        AlfrescoTransactionSupport.bindResource("checkoutforupload", Boolean.TRUE.toString());
        return checkout();
    }
    
    /**
     * Perform a check-out of this document into the specified destination space.
     * 
     * @param destination
     *            Destination for the checked out document working copy Node.
     * @return the working copy Node for the checked out document
     */
    public ScriptNode checkout(ScriptNode destination)
    {
        ParameterCheck.mandatory("Destination Node", destination);
        
        ChildAssociationRef childAssocRef = this.nodeService.getPrimaryParent(destination.getNodeRef());
        NodeRef workingCopyRef = this.services.getCheckOutCheckInService().checkout(this.nodeRef,
                destination.getNodeRef(), ContentModel.ASSOC_CONTAINS, childAssocRef.getQName());
        ScriptNode workingCopy = newInstance(workingCopyRef, this.services, this.scope);
        
        // reset the aspect and properties as checking out a document causes changes
        this.properties = null;
        this.aspects = null;
        
        return workingCopy;
    }
    
    /**
     * Check-in a working copy document. The current state of the working copy is copied to the original node,
     * this will include any content updated in the working node. Note that this method can only be called on a
     * working copy Node.
     * 
     * @return the original Node that was checked out.
     */
    public ScriptNode checkin()
    {
        return checkin("", false);
    }
    
    /**
     * Check-in a working copy document. The current state of the working copy is copied to the original node,
     * this will include any content updated in the working node. Note that this method can only be called on a
     * working copy Node.
     * 
     * @param history    Version history note
     * 
     * @return the original Node that was checked out.
     */
    public ScriptNode checkin(String history)
    {
        return checkin(history, false);
    }
    
    /**
     * Check-in a working copy document. The current state of the working copy is copied to the original node,
     * this will include any content updated in the working node. Note that this method can only be called on a
     * working copy Node.
     * 
     * @param history       Version history note
     * @param majorVersion  True to save as a major version increment, false for minor version.
     * 
     * @return the original Node that was checked out.
     */
    public ScriptNode checkin(String history, boolean majorVersion)
    {
        Map<String, Serializable> props = new HashMap<String, Serializable>(2, 1.0f);
        props.put(Version.PROP_DESCRIPTION, history);
        props.put(VersionModel.PROP_VERSION_TYPE, majorVersion ? VersionType.MAJOR : VersionType.MINOR);
        NodeRef original = this.services.getCheckOutCheckInService().checkin(this.nodeRef, props);
        this.versions = null;
        return newInstance(original, this.services, this.scope);
    }
    
    /**
     * Cancel the check-out of a working copy document. The working copy will be deleted and any changes made to it
     * are lost. Note that this method can only be called on a working copy Node. The reference to this working copy
     * Node should be discarded.
     * 
     * @return the original Node that was checked out.
     */
    public ScriptNode cancelCheckout()
    {
        NodeRef original = this.services.getCheckOutCheckInService().cancelCheckout(this.nodeRef);
        return newInstance(original, this.services, this.scope);
    }
        
    // ------------------------------------------------------------------------------
    // Transformation and Rendering API
    
    /**
     * Transform a document to a new document mimetype format. A copy of the document is made and the extension
     * changed to match the new mimetype, then the transformation isapplied.
     * 
     * @param mimetype   Mimetype destination for the transformation
     * 
     * @return Node representing the newly transformed document.
     */
    public ScriptNode transformDocument(String mimetype)
    {
        return transformDocument(mimetype, getPrimaryParentAssoc().getParentRef());
    }
    
    /**
     * Transform a document to a new document mimetype format. A copy of the document is made in the specified
     * destination folder and the extension changed to match the new mimetype, then then transformation is applied.
     * 
     * @param mimetype      Mimetype destination for the transformation
     * @param destination   Destination folder location
     * 
     * @return Node representing the newly transformed document.
     */
    public ScriptNode transformDocument(String mimetype, ScriptNode destination)
    {
        return transformDocument(mimetype, destination.getNodeRef());
    }
    
    private ScriptNode transformDocument(String mimetype, NodeRef destination)
    {
        ParameterCheck.mandatoryString("Mimetype", mimetype);
        ParameterCheck.mandatory("Destination Node", destination);
        
        // the delegate definition for transforming a document
        Transformer transformer = new Transformer()
        {
            public ScriptNode transform(ContentService contentService, NodeRef nodeRef, ContentReader reader,
                    ContentWriter writer)
            {
                ScriptNode transformedNode = null;
                if (contentService.isTransformable(reader, writer))
                {
                    contentService.transform(reader, writer);
                    transformedNode = newInstance(nodeRef, services, scope);
                }
                return transformedNode;
            }
        };
        
        return transformNode(transformer, mimetype, destination);
    }
    
    /**
     * Generic method to transform Node content from one mimetype to another.
     * 
     * @param transformer   The Transformer delegate supplying the transformation logic
     * @param mimetype      Mimetype of the destination content
     * @param destination   Destination folder location for the resulting document
     * 
     * @return Node representing the transformed content - or null if the transform failed
     */
    private ScriptNode transformNode(Transformer transformer, String mimetype, NodeRef destination)
    {
        ScriptNode transformedNode = null;
        
        // get the content reader
        ContentService contentService = this.services.getContentService();
        ContentReader reader = contentService.getReader(this.nodeRef, ContentModel.PROP_CONTENT);
        
        // only perform the transformation if some content is available
        if (reader != null)
        {
            // Copy the content node to a new node
            String copyName = TransformActionExecuter.transformName(this.services.getMimetypeService(), getName(),
                    mimetype, true);
            NodeRef copyNodeRef = this.services.getCopyService().copy(this.nodeRef, destination,
                    ContentModel.ASSOC_CONTAINS,
                    QName.createQName(ContentModel.PROP_CONTENT.getNamespaceURI(), QName.createValidLocalName(copyName)),
                    false);
            
            // modify the name of the copy to reflect the new mimetype
            this.nodeService.setProperty(copyNodeRef, ContentModel.PROP_NAME, copyName);
            
            // get the writer and set it up
            ContentWriter writer = contentService.getWriter(copyNodeRef, ContentModel.PROP_CONTENT, true);
            writer.setMimetype(mimetype); // new mimetype
            writer.setEncoding(reader.getEncoding()); // original encoding
            
            // Try and transform the content using the supplied delegate
            transformedNode = transformer.transform(contentService, copyNodeRef, reader, writer);
        }
        
        return transformedNode;
    }
    
    /**
     * Transform an image to a new image format. A copy of the image document is made and the extension changed to
     * match the new mimetype, then the transformation is applied.
     * 
     * @param mimetype   Mimetype destination for the transformation
     * 
     * @return Node representing the newly transformed image.
     */
    public ScriptNode transformImage(String mimetype)
    {
        return transformImage(mimetype, null, getPrimaryParentAssoc().getParentRef());
    }
    
    /**
     * Transform an image to a new image format. A copy of the image document is made and the extension changed to
     * match the new mimetype, then the transformation is applied.
     * 
     * @param mimetype   Mimetype destination for the transformation
     * @param options    Image convert command options
     * 
     * @return Node representing the newly transformed image.
     */
    public ScriptNode transformImage(String mimetype, String options)
    {
        return transformImage(mimetype, options, getPrimaryParentAssoc().getParentRef());
    }
    
    /**
     * Transform an image to a new image mimetype format. A copy of the image document is made in the specified
     * destination folder and the extension changed to match the newmimetype, then then transformation is applied.
     * 
     * @param mimetype      Mimetype destination for the transformation
     * @param destination   Destination folder location
     * 
     * @return Node representing the newly transformed image.
     */
    public ScriptNode transformImage(String mimetype, ScriptNode destination)
    {
        ParameterCheck.mandatory("Destination Node", destination);
        return transformImage(mimetype, null, destination.getNodeRef());
    }
    
    /**
     * Transform an image to a new image mimetype format. A copy of the image document is made in the specified
     * destination folder and the extension changed to match the new
     * mimetype, then then transformation is applied.
     * 
     * @param mimetype      Mimetype destination for the transformation
     * @param options       Image convert command options
     * @param destination   Destination folder location
     * 
     * @return Node representing the newly transformed image.
     */
    public ScriptNode transformImage(String mimetype, String options, ScriptNode destination)
    {
        ParameterCheck.mandatory("Destination Node", destination);
        return transformImage(mimetype, options, destination.getNodeRef());
    }
    
    private ScriptNode transformImage(String mimetype, final String options, NodeRef destination)
    {
        ParameterCheck.mandatoryString("Mimetype", mimetype);
        
        // the delegate definition for transforming an image
        Transformer transformer = new Transformer()
        {
            public ScriptNode transform(ContentService contentService, NodeRef nodeRef, ContentReader reader,
                    ContentWriter writer)
            {
                ImageTransformationOptions imageOptions = new ImageTransformationOptions();
                if (options != null)
                {
                    imageOptions.setCommandOptions(options);
                }
                contentService.getImageTransformer().transform(reader, writer, imageOptions);

                return newInstance(nodeRef, services, scope);
            }
        };
        
        return transformNode(transformer, mimetype, destination);
    }
    
    /**
     * Process a FreeMarker Template against the current node.
     * 
     * @param template      Node of the template to execute
     * 
     * @return output of the template execution
     */
    public String processTemplate(ScriptNode template)
    {
        ParameterCheck.mandatory("Template Node", template);
        return processTemplate(template.getContent(), null, null);
    }
    
    /**
     * Process a FreeMarker Template against the current node.
     * 
     * @param template   Node of the template to execute
     * @param args       Scriptable object (generally an associative array) containing the name/value pairs of
     *                   arguments to be passed to the template
     *                   
     * @return output of the template execution
     */
    public String processTemplate(ScriptNode template, Object args)
    {
        ParameterCheck.mandatory("Template Node", template);
        return processTemplate(template.getContent(), null, (ScriptableObject)args);
    }
    
    /**
     * Process a FreeMarker Template against the current node.
     * 
     * @param template   The template to execute
     * 
     * @return output of the template execution
     */
    public String processTemplate(String template)
    {
        ParameterCheck.mandatoryString("Template", template);
        return processTemplate(template, null, null);
    }
    
    /**
     * Process a FreeMarker Template against the current node.
     * 
     * @param template   The template to execute
     * @param args       Scriptable object (generally an associative array) containing the name/value pairs of
     *                   arguments to be passed to the template
     *                   
     * @return output of the template execution
     */
    public String processTemplate(String template, Object args)
    {
        ParameterCheck.mandatoryString("Template", template);
        return processTemplate(template, null, (ScriptableObject)args);
    }
    
    private String processTemplate(String template, NodeRef templateRef, ScriptableObject args)
    {
        Object person = (Object)scope.get("person", scope);
        Object companyhome = (Object)scope.get("companyhome", scope);
        Object userhome = (Object)scope.get("userhome", scope);
        
        // build default model for the template processing
        Map<String, Object> model = this.services.getTemplateService().buildDefaultModel(
            (person.equals(UniqueTag.NOT_FOUND)) ? null : ((ScriptNode)((Wrapper)person).unwrap()).getNodeRef(),
            (companyhome.equals(UniqueTag.NOT_FOUND)) ? null : ((ScriptNode)((Wrapper)companyhome).unwrap()).getNodeRef(),
            (userhome.equals(UniqueTag.NOT_FOUND)) ? null : ((ScriptNode)((Wrapper)userhome).unwrap()).getNodeRef(),
            templateRef,
            null);
        
        // add the current node as either the document/space as appropriate
        if (this.getIsDocument())
        {
            model.put("document", this.nodeRef);
            model.put("space", getPrimaryParentAssoc().getParentRef());
        }
        else
        {
            model.put("space", this.nodeRef);
        }
        
        // add the supplied args to the 'args' root object
        if (args != null)
        {
            // we need to get all the keys to the properties provided
            // and convert them to a Map of QName to Serializable objects
            Object[] propIds = args.getIds();
            Map<String, String> templateArgs = new HashMap<String, String>(propIds.length);
            for (int i = 0; i < propIds.length; i++)
            {
                // work on each key in turn
                Object propId = propIds[i];
                
                // we are only interested in keys that are formed of Strings i.e. QName.toString()
                if (propId instanceof String)
                {
                    // get the value out for the specified key - make sure it is Serializable
                    Object value = args.get((String) propId, args);
                    value = getValueConverter().convertValueForRepo((Serializable)value);
                    if (value != null)
                    {
                        templateArgs.put((String) propId, value.toString());
                    }
                }
            }
            // add the args to the model as the 'args' root object
            model.put("args", templateArgs);
        }
        
        // execute template!
        // TODO: check that script modified nodes are reflected...
        return this.services.getTemplateService().processTemplateString(null, template, model);
    }
    
    // ------------------------------------------------------------------------------
    // Thumbnail Methods
    
    /**
     * Creates a thumbnail for the content property of the node.
     * 
     * The thumbnail name correspionds to pre-set thumbnail details stored in the 
     * repository.
     * 
     * @param  thumbnailName    the name of the thumbnail
     * @return ScriptThumbnail  the newly create thumbnail node
     */
    public ScriptThumbnail createThumbnail(String thumbnailName)
    {
        return createThumbnail(thumbnailName, false);
    }
    
    /**
     * Creates a thumbnail for the content property of the node.
     * 
     * The thumbnail name correspionds to pre-set thumbnail details stored in the 
     * repository.
     * 
     * If the thumbnail is created asynchronously then the result will be null and creation
     * of the thumbnail will occure at some point in the background.
     * 
     * @param  thumbnailName    the name of the thumbnail
     * @param  async            indicates whether the thumbnail is create asynchronously or not
     * @return ScriptThumbnail  the newly create thumbnail node or null if async creation occures
     */
    public ScriptThumbnail createThumbnail(String thumbnailName, boolean async)
    {
        ScriptThumbnail result = null;
        
        // Use the thumbnail registy to get the details of the thumbail
        ThumbnailRegistry registry = this.services.getThumbnailService().getThumbnailRegistry();
        ThumbnailDefinition details = registry.getThumbnailDefinition(thumbnailName);
        if (details == null)
        {
            // Throw exception 
            throw new ScriptException("The thumbnail name '" + thumbnailName + "' is not registered");
        }
        
        // If there's nothing currently registered to generate thumbnails for the
        //  specified mimetype, then log a message and bail out
        String nodeMimeType = getMimetype();
        if (!registry.isThumbnailDefinitionAvailable(nodeMimeType, details))
        {
            logger.info("Unable to create thumbnail '" + details.getName() + "' for " +
                    nodeMimeType + " as no transformer is currently available");
            return null;
        }
        
        // Have the thumbnail created
        if (async == false)
        {
            // Create the thumbnail
            NodeRef thumbnailNodeRef = this.services.getThumbnailService().createThumbnail(
                    this.nodeRef, 
                    ContentModel.PROP_CONTENT, 
                    details.getMimetype(), 
                    details.getTransformationOptions(), 
                    details.getName());
            
            // Create the thumbnail script object
            result = new ScriptThumbnail(thumbnailNodeRef, this.services, this.scope);
        }
        else
        {
            Action action = ThumbnailHelper.createCreateThumbnailAction(details, services);
            
            // Queue async creation of thumbnail
            this.services.getActionService().executeAction(action, this.nodeRef, true, true);
        }
        
        return result;
    }

    /**
     * Get the given thumbnail for the content property
     * 
     * @param thumbnailName     the thumbnail name
     * @return ScriptThumbnail  the thumbnail
     */
    public ScriptThumbnail getThumbnail(String thumbnailName)
    {
        ScriptThumbnail result = null;
        NodeRef thumbnailNodeRef = this.services.getThumbnailService().getThumbnailByName(
                this.nodeRef, 
                ContentModel.PROP_CONTENT, 
                thumbnailName);
        if (thumbnailNodeRef != null)
        {
            result = new ScriptThumbnail(thumbnailNodeRef, this.services, this.scope);
        }
        return result;
    }
    
    /**
     * Get the all the thumbnails for a given node's content property.
     * 
     * @return  Scriptable     list of thumbnails, empty if none available
     */
    public ScriptThumbnail[] getThumbnails()
    {
        List<NodeRef> thumbnails = this.services.getThumbnailService().getThumbnails(
                this.nodeRef, 
                ContentModel.PROP_CONTENT, 
                null, 
                null);
        
        List<ScriptThumbnail> result = new ArrayList<ScriptThumbnail>(thumbnails.size());
        for (NodeRef thumbnail : thumbnails)
        {
            ScriptThumbnail scriptThumbnail = new ScriptThumbnail(thumbnail, this.services, this.scope);
            result.add(scriptThumbnail);
        }
        return (ScriptThumbnail[])result.toArray(new ScriptThumbnail[result.size()]);
    }
    
    /**
     * Returns the names of the thumbnail defintions that can be applied to the content property of
     * this node.
     * <p>
     * Thumbanil defintions only appear in this list if they can produce a thumbnail for the content
     * found in the content property.  This will be determined by looking at the mimetype of the content
     * and the destinatino mimetype of the thumbnail.
     * 
     * @return  String[]    array of thumbnail names that are valid for the current content type
     */
    public String[] getThumbnailDefintions()
    {
        ContentService contentService = this.services.getContentService();
        ThumbnailService thumbnailService = this.services.getThumbnailService();
        
        List<String> result = new ArrayList<String>(7);
        
        ContentReader contentReader = contentService.getReader(this.nodeRef, ContentModel.PROP_CONTENT);
        if (contentReader != null)
        {
            String mimetype = contentReader.getMimetype();
            List<ThumbnailDefinition> thumbnailDefinitions = thumbnailService.getThumbnailRegistry().getThumnailDefintions(mimetype);
            for (ThumbnailDefinition thumbnailDefinition : thumbnailDefinitions)
            {
                result.add(thumbnailDefinition.getName());
            }
        }
        
        return (String[])result.toArray(new String[result.size()]);
    }
    
    
    // ------------------------------------------------------------------------------
    // Tag methods
    
    /**
     * Clear the node's tags
     */
    public void clearTags()
    {
        this.services.getTaggingService().clearTags(this.nodeRef);
        updateTagProperty();
    }
    
    /**
     * Adds a tag to the node
     * 
     * @param tag   tag name
     */
    public void addTag(String tag)
    {
        this.services.getTaggingService().addTag(this.nodeRef, tag);
        updateTagProperty();
    }
    
    /**
     * Adds all the tags to the node
     * 
     * @param tags  array of tag names
     */
    public void addTags(String[] tags)
    {
        this.services.getTaggingService().addTags(this.nodeRef, Arrays.asList(tags));
        updateTagProperty();
    }
    
    /**
     * Removes a tag from the node
     * 
     * @param tag   tag name
     */
    public void removeTag(String tag)
    {
        this.services.getTaggingService().removeTag(this.nodeRef, tag);
        updateTagProperty();
    }
    
    /**
     * Removes all the tags from the node
     * 
     * @param tags  array of tag names
     */
    public void removeTags(String[] tags)
    {
        this.services.getTaggingService().removeTags(this.nodeRef, Arrays.asList(tags));
        updateTagProperty();
    }
    
    /**
     * Get all the tags applied to this node
     * 
     * @return String[]     array containing all the tag applied to this node
     */
    public String[] getTags()
    {
        String[] result = null;
        List<String> tags = this.services.getTaggingService().getTags(this.nodeRef);
        if (tags.isEmpty() == true)
        {
            result = new String[0];
        }
        else
        {
            result = (String[])tags.toArray(new String[tags.size()]);
        }
        return result;
    }
    
    /**
     * Set the tags applied to this node.  This overwirtes the list of tags currently applied to the 
     * node.
     * 
     * @param tags  array of tags
     */
    public void setTags(String[] tags)
    {
        this.services.getTaggingService().setTags(this.nodeRef, Arrays.asList(tags));
        updateTagProperty();
    }
    
    private void updateTagProperty()
    {
        Serializable tags = this.services.getNodeService().getProperty(this.nodeRef, ContentModel.PROP_TAGS);
        if (this.properties != null)
        {
            this.properties.put(ContentModel.PROP_TAGS.toString(), getValueConverter().convertValueForScript(ContentModel.PROP_TAGS, tags));
        }
    }
    
    /**
     * Sets whether this node is a tag scope or not
     * 
     * @param value     true if this node is a tag scope, false otherwise
     */
    public void setIsTagScope(boolean value)
    {
        boolean currentValue = this.services.getTaggingService().isTagScope(this.nodeRef);
        if (currentValue != value)
        {
            if (value == true)
            {
                // Add the tag scope
                this.services.getTaggingService().addTagScope(this.nodeRef);
            }
            else
            {
                // Remove the tag scope
                this.services.getTaggingService().removeTagScope(this.nodeRef);
            }
        }
    }
    
    /**
     * Gets whether this node is a tag scope
     * 
     * @return  boolean     true if this node is a tag scope, false otherwise
     */
    public boolean getIsTagScope()
    {
        return this.services.getTaggingService().isTagScope(this.nodeRef);
    }
    
    /**
     * Gets the 'nearest' tag scope to this node by travesing up the parent hierarchy untill one is found.
     * <p>
     * If none is found, null is returned.
     *
     * @return  TagScope    the 'nearest' tag scope
     */
    public TagScope getTagScope()
    {
        TagScope tagScope = null;
        org.alfresco.service.cmr.tagging.TagScope tagScopeImpl = this.services.getTaggingService().findTagScope(this.nodeRef);
        if (tagScopeImpl != null)
        {
            tagScope = new TagScope(this.services.getTaggingService(), tagScopeImpl);
        }        
        return tagScope;
    }
    
    /**
     * Gets all (deep) children of this node that have the tag specified.
     * 
     * @param tag               tag name
     * @return ScriptNode[]     nodes that are deep children of the node with the tag
     */
    public ScriptNode[] childrenByTags(String tag)
    {
        List<NodeRef> nodeRefs = this.services.getTaggingService().findTaggedNodes(this.nodeRef.getStoreRef(), tag, this.nodeRef);
        ScriptNode[] nodes = new ScriptNode[nodeRefs.size()];
        int index = 0;
        for (NodeRef node : nodeRefs)
        {
            nodes[index] = new ScriptNode(node, this.services, this.scope);
            index ++;
        }
        return nodes;
    }

    
    // ------------------------------------------------------------------------------
    // Workflow methods

    /**
     * Get active workflow instances this node belongs to
     * 
     * @return the active workflow instances this node belongs to
     */
    public Scriptable getActiveWorkflows()
    {
        if (this.activeWorkflows == null)
        {
            WorkflowService workflowService = this.services.getWorkflowService();
            
            List<WorkflowInstance> workflowInstances = workflowService.getWorkflowsForContent(this.nodeRef, true);
            Object[] jsWorkflowInstances = new Object[workflowInstances.size()];
            int index = 0;
            for (WorkflowInstance workflowInstance : workflowInstances)
            {
                jsWorkflowInstances[index++] = new JscriptWorkflowInstance(workflowInstance, this.services, this.scope);
            }
            this.activeWorkflows = Context.getCurrentContext().newArray(this.scope, jsWorkflowInstances);		
        }
    
        return this.activeWorkflows;
    }

    // ------------------------------------------------------------------------------
    // Site methods
    
    /**
     * Returns the short name of the site this node is located within. If the 
     * node is not located within a site null is returned.
     * 
     * @return The short name of the site this node is located within, null
     *         if the node is not located within a site.
     */
    public String getSiteShortName()
    {
        if (!this.siteNameResolved)
        {
            this.siteNameResolved = true;
            
            Path path = this.services.getNodeService().getPath(getNodeRef());
            
            if (logger.isDebugEnabled())
                logger.debug("Determing if node is within a site using path: " + path);
            
            for (int i = 0; i < path.size(); i++)
            {
                if ("st:sites".equals(path.get(i).getPrefixedString(this.services.getNamespaceService())))
                {
                    // we now know the node is in a site, find the next element in the array (if there is one)
                    if ((i+1) < path.size())
                    {
                        // get the site name
                        Path.Element siteName = path.get(i+1);
                     
                        // remove the "cm:" prefix and add to result object
                        this.siteName = ISO9075.decode(siteName.getPrefixedString(
                                    this.services.getNamespaceService()).substring(3));
                    }
                  
                    break;
                }
            }
        }
        
        if (logger.isDebugEnabled())
        {
            logger.debug(this.siteName != null ? 
                        "Node is in the site named \"" + this.siteName + "\"" : "Node is not in a site");
        }
        
        return this.siteName;
    }

    // ------------------------------------------------------------------------------
    // Helper methods
    
    /**
     * Override Object.toString() to provide useful debug output
     */
    public String toString()
    {
        if (this.nodeService.exists(nodeRef))
        {
            if (this.services.getPermissionService().hasPermission(nodeRef, PermissionService.READ_PROPERTIES) == AccessStatus.ALLOWED)
            {
                // TODO: DC: Allow debug output of property values - for now it's disabled as this could potentially
                // follow a large network of nodes. Unfortunately, JBPM issues unprotected debug statements
                // where node.toString is used - will request this is fixed in next release of JBPM.
                return "Node Type: " + getType() + ", Node Aspects: " + getAspectsSet().toString();
            }
            else
            {
                return "Access denied to node " + nodeRef;
            }

        }
        else
        {
            return "Node no longer exists: " + nodeRef;
        }
    }

    /**
     * Returns the JSON representation of this node.
     * 
     * @param useShortQNames if true short-form qnames will be returned, else long-form.
     * @return The JSON representation of this node
     */
    public String toJSON(boolean useShortQNames)
    {
        // This method is used by the /api/metadata web script
       String jsonStr = "{}";
       
       if (this.nodeService.exists(nodeRef))
       {
           if(this.services.getPublicServiceAccessService().hasAccess(ServiceRegistry.NODE_SERVICE.getLocalName(), "getProperties", this.nodeRef) == AccessStatus.ALLOWED)
           {
               JSONObject json = new JSONObject();
              
               try
               {
                   // add type info
                   json.put("nodeRef", this.getNodeRef().toString());
                   
                   String typeString = useShortQNames ? getShortQName(this.getQNameType())
                           : this.getType();
                   json.put("type", typeString);
                   json.put("mimetype", this.getMimetype());
                   
                   // add properties
                   Map<QName, Serializable> nodeProperties = this.nodeService.getProperties(this.nodeRef);
                   if (useShortQNames)
                   {
                       Map<String, Serializable> nodePropertiesShortQNames
                               = new LinkedHashMap<String, Serializable>(nodeProperties.size());
                       for (QName nextLongQName : nodeProperties.keySet())
                       {
                           try
                           {
                               String nextShortQName = getShortQName(nextLongQName);
                               nodePropertiesShortQNames.put(nextShortQName, nodeProperties.get(nextLongQName));
                           }
                           catch (NamespaceException ne)
                           {
                               // ignore properties that do not have a registered namespace
                               
                               if (logger.isDebugEnabled())
                                   logger.debug("Ignoring property '" + nextLongQName + "' as it's namespace is not registered");
                           }
                       }
                       json.put("properties", nodePropertiesShortQNames);
                   }
                   else
                   {
                       json.put("properties", nodeProperties);
                   }
                   
                   // add aspects as an array
                   Set<QName> nodeAspects = this.nodeService.getAspects(this.nodeRef);
                   if (useShortQNames)
                   {
                       Set<String> nodeAspectsShortQNames
                               = new LinkedHashSet<String>(nodeAspects.size());
                       for (QName nextLongQName : nodeAspects)
                       {
                           String nextShortQName = getShortQName(nextLongQName);
                           nodeAspectsShortQNames.add(nextShortQName);
                       }
                       json.put("aspects", nodeAspectsShortQNames);
                   }
                   else
                   {
                       json.put("aspects", nodeAspects);
                   }
               }
               catch (JSONException error)
               {
                   error.printStackTrace();
               }
              
               jsonStr = json.toString();
           }
       }
       
       return jsonStr;
    }
    
    /**
     * Returns the JSON representation of this node. Long-form QNames are used in the
     * result.
     * 
     * @return The JSON representation of this node
     */
    public String toJSON()
    {
        return this.toJSON(false);
    }
    
    /**
     * Given a long-form QName, this method uses the namespace service to create a
     * short-form QName string.
     * 
     * @param longQName
     * @return the short form of the QName string, e.g. "cm:content"
     */
    private String getShortQName(QName longQName)
    {
        return longQName.toPrefixString(services.getNamespaceService());
    }
    
    /**
     * Helper to create a QName from either a fully qualified or short-name QName string
     * 
     * @param s    Fully qualified or short-name QName string
     * 
     * @return QName
     */
    private QName createQName(String s)
    {
        QName qname;
        if (s.indexOf(NAMESPACE_BEGIN) != -1)
        {
            qname = QName.createQName(s);
        }
        else
        {
            qname = QName.createQName(s, this.services.getNamespaceService());
        }
        return qname;
    }
    
    /**
     * Reset the Node cached state
     */
    public void reset()
    {
        this.name = null;
        this.type = null;
        this.properties = null;
        this.aspects = null;
        this.targetAssocs = null;
        this.sourceAssocs = null;
        this.childAssocs = null;
        this.children = null;
        this.hasChildren = null;
        this.parentAssocs = null;
        this.displayPath = null;
        this.isDocument = null;
        this.isContainer = null;
        this.parent = null;
        this.primaryParentAssoc = null;
        this.activeWorkflows = null;
        this.siteName = null;
        this.siteNameResolved = false;
    }
    
    /**
     * @return helper object to perform cross repository copy of JavaScript Node objects
     */
    protected CrossRepositoryCopy getCrossRepositoryCopyHelper()
    {
        return (CrossRepositoryCopy)this.services.getService(
                QName.createQName("", CrossRepositoryCopy.BEAN_NAME));
    }
    
    /**
     * Return a list or a single Node from executing an xpath against the parent Node.
     * 
     * @param xpath      XPath to execute
     * @param firstOnly  True to return the first result only
     * 
     * @return Object[] can be empty but never null
     */
    private Object[] getChildrenByXPath(String xpath, QueryParameterDefinition[] params, boolean firstOnly)
    {
        Object[] result = null;
        
        if (xpath.length() != 0)
        {
            if (logger.isDebugEnabled())
            {
               logger.debug("Executing xpath: " + xpath);
               if (params != null)
               {
                  for (int i=0; i<params.length; i++)
                  {
                     logger.debug(" [" + params[i].getQName() + "]=" + params[i].getDefault());
                  }
               }
            }
            
            List<NodeRef> nodes = this.services.getSearchService().selectNodes(this.nodeRef, xpath, params,
                    this.services.getNamespaceService(), false);
            
            // see if we only want the first result
            if (firstOnly == true)
            {
                if (nodes.size() != 0)
                {
                    result = new Object[1];
                    result[0] = newInstance(nodes.get(0), this.services, this.scope);
                }
            }
            // or all the results
            else
            {
                result = new Object[nodes.size()];
                for (int i = 0; i < nodes.size(); i++)
                {
                    NodeRef ref = nodes.get(i);
                    result[i] = newInstance(ref, this.services, this.scope);
                }
            }
        }
        
        return result != null ? result : new Object[0];
    }
    
    /**
     * Helper to return true if the supplied property value is a ScriptContentData object
     * 
     * @param o     Object to test
     * 
     * @return true if instanceof ScriptContentData, false otherwise
     */
    public boolean isScriptContent(Object o)
    {
        return (o instanceof ScriptContentData);
    }
    
    
    // ------------------------------------------------------------------------------
    // Value Conversion
    
    /**
     * Gets the node value converter
     * 
     * @return the node value converter
     */
    protected NodeValueConverter getValueConverter()
    {
        if (converter == null)
        {
            converter = createValueConverter();
        }
        return converter;
    }
    
    /**
     * Constructs the node value converter
     * 
     * @return the node value converter
     */
    protected NodeValueConverter createValueConverter()
    {
        return new NodeValueConverter();
    }
    
    // Set support
    
    /**
     * Value converter with knowledge of Node specific value types
     */
    public class NodeValueConverter extends ValueConverter
    {
        /**
         * Convert an object from any repository serialized value to a valid script object. This includes converting
         * Collection multi-value properties into JavaScript Array objects.
         * 
         * @param qname      QName of the property value for conversion
         * @param value      Property value
         * 
         * @return Value safe for scripting usage
         */
        public Serializable convertValueForScript(QName qname, Serializable value)
        {
            return convertValueForScript(services, scope, qname, value);
        }
        
        /*
         * (non-Javadoc)
         * 
         * @see org.alfresco.repo.jscript.ValueConverter#convertValueForScript(org.alfresco.service.ServiceRegistry,
         *      org.mozilla.javascript.Scriptable, org.alfresco.service.namespace.QName, java.io.Serializable)
         */
        @Override
        public Serializable convertValueForScript(ServiceRegistry services, Scriptable scope, QName qname,
                Serializable value)
        {
            if (value instanceof ContentData)
            {
                // ContentData object properties are converted to ScriptContentData objects
                // so the content and other properties of those objects can be accessed
                value = new ScriptContentData((ContentData) value, qname);
            }
            else
            {
                value = super.convertValueForScript(services, scope, qname, value);
            }
            return value;
        }
        
        /*
         * (non-Javadoc)
         * 
         * @see org.alfresco.repo.jscript.ValueConverter#convertValueForRepo(java.io.Serializable)
         */
        @Override
        public Serializable convertValueForRepo(Serializable value)
        {
            if (value instanceof ScriptContentData)
            {
                // convert back to ContentData
                value = ((ScriptContentData) value).contentData;
            }
            else
            {
                value = super.convertValueForRepo(value);
            }
            return value;
        }
    }
    
    
    // ------------------------------------------------------------------------------
    // Inner Classes
    
    
    /**
     * Inner class wrapping and providing access to a ContentData property
     */
    public class ScriptContentData implements Content, Serializable
    {
        private static final long serialVersionUID = -7819328543933312278L;
        
        /**
         * Constructor
         * 
         * @param contentData      The ContentData object this object wraps
         * @param property         The property the ContentData is attached too
         */
        public ScriptContentData(ContentData contentData, QName property)
        {
            this.contentData = contentData;
            this.property = property;
        }

        /* (non-Javadoc)
         * @see org.alfresco.repo.jscript.ScriptNode.ScriptContent#getContent()
         */
        public String getContent()
        {
            ContentService contentService = services.getContentService();
            ContentReader reader = contentService.getReader(nodeRef, property);
            return (reader != null && reader.exists()) ? reader.getContentString() : "";
        }
        
        /*
         * (non-Javadoc)
         * @see org.springframework.extensions.surf.util.Content#getInputStream()
         */
        public InputStream getInputStream()
        {
            ContentService contentService = services.getContentService();
            ContentReader reader = contentService.getReader(nodeRef, property);
            return (reader != null && reader.exists()) ? reader.getContentInputStream() : null;
        }
        
        /*
         * (non-Javadoc)
         * @see org.springframework.extensions.surf.util.Content#getReader()
         */
        public Reader getReader()
        {
            ContentService contentService = services.getContentService();
            ContentReader reader = contentService.getReader(nodeRef, property);
            
            if (reader != null && reader.exists())
            {
                try
                {
                    return (contentData.getEncoding() == null) ? new InputStreamReader(reader.getContentInputStream()) : new InputStreamReader(reader.getContentInputStream(), contentData.getEncoding());
                }
                catch (IOException e)
                {
                    // NOTE: fall-through
                }
            }
            return null;
        }
        
        /**
         * Set the content stream
         * 
         * @param content    Content string to set
         */
        public void setContent(String content)
        {
            ContentService contentService = services.getContentService();
            ContentWriter writer = contentService.getWriter(nodeRef, this.property, true);
            writer.setMimetype(getMimetype()); // use existing mimetype value
            writer.putContent(content);
            
            // update cached variables after putContent()
            this.contentData = (ContentData) services.getNodeService().getProperty(nodeRef, this.property);
        }
        
        /**
         * Set the content stream from another content object
         *  
         * @param content  ScriptContent to set
         */
        public void write(Content content)
        {
            ContentService contentService = services.getContentService();
            ContentWriter writer = contentService.getWriter(nodeRef, this.property, true);
            writer.setMimetype(content.getMimetype());
            writer.setEncoding(content.getEncoding());
            writer.putContent(content.getInputStream());

            // update cached variables after putContent()
            this.contentData = (ContentData) services.getNodeService().getProperty(nodeRef, this.property);
        }

        /**
         * Set the content stream from another input stream
         *  
         * @param inputStream
         */
        public void write(InputStream inputStream)
        {
            ContentService contentService = services.getContentService();
            ContentWriter writer = contentService.getWriter(nodeRef, this.property, true);
            writer.putContent(inputStream);

            // update cached variables after putContent()
            this.contentData = (ContentData) services.getNodeService().getProperty(nodeRef, this.property);
        }

        /**
         * Delete the content stream
         */
        public void delete()
        {
            ContentService contentService = services.getContentService();
            ContentWriter writer = contentService.getWriter(nodeRef, this.property, true);
            OutputStream output = writer.getContentOutputStream();
            try
            {
                output.close();
            }
            catch (IOException e)
            {
                // NOTE: fall-through
            }
            writer.setMimetype(null);
            writer.setEncoding(null);
            
            // update cached variables after putContent()
            this.contentData = (ContentData) services.getNodeService().getProperty(nodeRef, this.property);
        }
        
        /**
         * @return download URL to the content
         */
        public String getUrl()
        {
            return MessageFormat.format(CONTENT_PROP_URL, new Object[] { nodeRef.getStoreRef().getProtocol(),
                    nodeRef.getStoreRef().getIdentifier(), nodeRef.getId(),
                    URLEncoder.encode(getName()),
                    URLEncoder.encode(property.toString()) });
        }
        
        /**
         * @return download URL to the content for a document item only
         */
        public String getDownloadUrl()
        {
            if (getIsDocument() == true)
            {
                return MessageFormat.format(CONTENT_DOWNLOAD_PROP_URL, new Object[] {
                        nodeRef.getStoreRef().getProtocol(),
                        nodeRef.getStoreRef().getIdentifier(),
                        nodeRef.getId(),
                        URLEncoder.encode(getName()),
                        URLEncoder.encode(property.toString()) });
            }
            else
            {
                return "";
            }
        }

        public long getSize()
        {
            return contentData.getSize();
        }
        
        public String getMimetype()
        {
            return contentData.getMimetype();
        }
        
        public String getEncoding()
        {
            return contentData.getEncoding();
        }
        
        public void setEncoding(String encoding)
        {
            this.contentData = ContentData.setEncoding(this.contentData, encoding);
            services.getNodeService().setProperty(nodeRef, this.property, this.contentData);
            
            // update cached variables after putContent()
            this.contentData = (ContentData) services.getNodeService().getProperty(nodeRef, this.property);
        }

        public void setMimetype(String mimetype)
        {
            this.contentData = ContentData.setMimetype(this.contentData, mimetype);
            services.getNodeService().setProperty(nodeRef, this.property, this.contentData);
            
            // update cached variables after putContent()
            this.contentData = (ContentData) services.getNodeService().getProperty(nodeRef, this.property);
        }
        
        /**
         * Guess the mimetype for the given filename - uses the extension to match on system mimetype map
         */
        public void guessMimetype(String filename)
        {
            ContentService contentService = services.getContentService();
            ContentReader reader = contentService.getReader(nodeRef, property); 
            setMimetype(services.getMimetypeService().guessMimetype(filename, reader));
        }
        
        /**
         * Guess the character encoding of a file. For non-text files UTF-8 default is applied, otherwise
         * the appropriate encoding (such as UTF-16 or similar) will be appiled if detected.
         */
        public void guessEncoding()
        {
            String encoding = "UTF-8";
            InputStream in = null;
            try
            {
                in = getInputStream();
                if (in != null)
                {
                    Charset charset = services.getMimetypeService().getContentCharsetFinder().getCharset(in, getMimetype());
                    encoding = charset.name();
                }
            }
            finally
            {
                try
                {
                    if (in != null)
                    {
                        in.close();
                    }
                }
                catch (IOException ioErr)
                {
                }
            }
            setEncoding(encoding);
        }
        
        private ContentData contentData;
        private QName property;
    }
    
    /**
     * Interface contract for simple anonymous classes that implement document transformations
     */
    private interface Transformer
    {
        /**
         * Transform the reader to the specified writer
         * 
         * @param contentService   ContentService
         * @param noderef          NodeRef of the destination for the transform
         * @param reader           Source reader
         * @param writer           Destination writer
         * 
         * @return Node representing the transformed entity
         */
        ScriptNode transform(ContentService contentService, NodeRef noderef, ContentReader reader, ContentWriter writer);
    }
    
    
    /**
     * NamespacePrefixResolverProvider getter implementation
     */
    public NamespacePrefixResolver getNamespacePrefixResolver()
    {
        return this.services.getNamespaceService();
    }
}