/*
* Copyright (C) 2005-2007 Alfresco Software Limited.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* As a special exception to the terms and conditions of version 2.0 of
* the GPL, you may redistribute this Program in connection with Free/Libre
* and Open Source Software ("FLOSS") applications as described in Alfresco's
* FLOSS exception. You should have recieved a copy of the text describing
* the FLOSS exception, and it is also available here:
* http://www.alfresco.com/legal/licensing"
*/
package org.alfresco.repo.jscript;
import java.io.StringReader;
import java.util.LinkedHashSet;
import org.alfresco.error.AlfrescoRuntimeException;
import org.alfresco.model.ContentModel;
import org.alfresco.repo.search.impl.lucene.LuceneQueryParser;
import org.alfresco.service.ServiceRegistry;
import org.alfresco.service.cmr.repository.ContentReader;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.StoreRef;
import org.alfresco.service.cmr.search.ResultSet;
import org.alfresco.service.cmr.search.ResultSetRow;
import org.alfresco.service.cmr.search.SearchService;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
/**
* Search component for use by the ScriptService.
* <p>
* Provides access to Lucene search facilities including saved search objects. The results
* from a search are returned as an array (collection) of scriptable Node wrapper objects.
* <p>
* The object is added to the root of the model to provide syntax such as:
* <code>var results = search.luceneSearch(statement);</code>
* and
* <code>var results = search.savedSearch(node);</code>
*
* @author Kevin Roast
*/
public final class Search extends BaseScopableProcessorExtension
{
/** Service registry */
private ServiceRegistry services;
/** Default store reference */
private StoreRef storeRef;
/**
* Set the default store reference
*
* @param storeRef the default store reference
*/
public void setStoreUrl(String storeRef)
{
this.storeRef = new StoreRef(storeRef);
}
/**
* Set the service registry
*
* @param services the service registry
*/
public void setServiceRegistry(ServiceRegistry services)
{
this.services = services;
}
/**
* Find a single Node by the Node reference
*
* @param ref The NodeRef of the Node to find
*
* @return the Node if found or null if failed to find
*/
public Node findNode(NodeRef ref)
{
return findNode(ref.toString());
}
/**
* Find a single Node by the Node reference
*
* @param ref The fully qualified NodeRef in String format
*
* @return the Node if found or null if failed to find
*/
public Node findNode(String ref)
{
String query = "ID:" + LuceneQueryParser.escape(ref);
Node[] result = query(query, SearchService.LANGUAGE_LUCENE);
if (result.length == 1)
{
return result[0];
}
else
{
return null;
}
}
/**
* Execute a XPath search
*
* @param search XPath search string to execute
*
* @return Node[] of results from the search - can be empty but not null
*/
public Node[] xpathSearch(String search)
{
if (search != null && search.length() != 0)
{
return query(search, SearchService.LANGUAGE_XPATH);
}
else
{
return new Node[0];
}
}
/**
* Execute a Lucene search
*
* @param search Lucene search string to execute
*
* @return Node[] of results from the search - can be empty but not null
*/
public Node[] luceneSearch(String search)
{
if (search != null && search.length() != 0)
{
return query(search, SearchService.LANGUAGE_LUCENE);
}
else
{
return new Node[0];
}
}
/**
* Execute a saved Lucene search
*
* @param savedSearch Node that contains the saved search XML content
*
* @return Node[] of results from the search - can be empty but not null
*/
public Node[] savedSearch(Node savedSearch)
{
String search = null;
// read the Saved Search XML on the specified node - and get the Lucene search from it
try
{
if (savedSearch != null)
{
ContentReader content = this.services.getContentService().getReader(
savedSearch.getNodeRef(), ContentModel.PROP_CONTENT);
if (content != null && content.exists())
{
// get the root element
SAXReader reader = new SAXReader();
Document document = reader.read(new StringReader(content.getContentString()));
Element rootElement = document.getRootElement();
Element queryElement = rootElement.element("query");
if (queryElement != null)
{
search = queryElement.getText();
}
}
}
}
catch (Throwable err)
{
throw new AlfrescoRuntimeException("Failed to find or load saved Search: " + savedSearch.getNodeRef(), err);
}
return search != null ? query(search, SearchService.LANGUAGE_LUCENE) : new Node[0];
}
/**
* Execute a saved Lucene search
*
* @param searchRef NodeRef string that points to the node containing saved search XML content
*
* @return Node[] of results from the search - can be empty but not null
*/
public Node[] savedSearch(String searchRef)
{
if (searchRef != null)
{
return savedSearch(new Node(new NodeRef(searchRef), services, null));
}
else
{
return new Node[0];
}
}
/**
* Execute the query
*
* Removes any duplicates that may be present (ID can cause duplicates - it is better to remove them here)
*
* @param search
* @return
*/
private Node[] query(String search, String language)
{
LinkedHashSet<Node> set = new LinkedHashSet<Node> ();
// perform the search against the repo
ResultSet results = null;
try
{
results = this.services.getSearchService().query(
this.storeRef,
language,
search);
if (results.length() != 0)
{
for (ResultSetRow row: results)
{
NodeRef nodeRef = row.getNodeRef();
set.add(new Node(nodeRef, services, getScope()));
}
}
}
catch (Throwable err)
{
throw new AlfrescoRuntimeException("Failed to execute search: " + search, err);
}
finally
{
if (results != null)
{
results.close();
}
}
return set.toArray(new Node[(set.size())]);
}
}