mirror of
https://github.com/Alfresco/alfresco-community-repo.git
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c4ae3bd5fa
go through DeletedNode implementation to make sure it's fully first class. Adding some debugging code that throws exceptions if it detects certain kinds of races. It can be turned off but I want to leave it on until GA. And, you'll need to start from a clean database as the AVM schema have changed. git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@4683 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
883 lines
29 KiB
Java
883 lines
29 KiB
Java
/*
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* Copyright (C) 2006 Alfresco, Inc.
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*
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* Licensed under the Mozilla Public License version 1.1
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* with a permitted attribution clause. You may obtain a
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* copy of the License at
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*
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* http://www.alfresco.org/legal/license.txt
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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* either express or implied. See the License for the specific
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* language governing permissions and limitations under the
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* License.
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*/
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package org.alfresco.repo.avm;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.SortedMap;
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import java.util.TreeMap;
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import org.alfresco.service.cmr.avm.AVMBadArgumentException;
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import org.alfresco.service.cmr.avm.AVMException;
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import org.alfresco.service.cmr.avm.AVMExistsException;
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import org.alfresco.service.cmr.avm.AVMNodeDescriptor;
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import org.alfresco.service.cmr.avm.AVMNotFoundException;
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/**
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* A layered directory node. A layered directory node points at
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* an underlying directory, which may or may not exist. The visible
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* contents of a layered directory node is the contents of the underlying node
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* pointed at plus those nodes added to or modified in the layered directory node minus
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* those nodes which have been deleted in the layered directory node.
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* @author britt
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*/
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class LayeredDirectoryNodeImpl extends DirectoryNodeImpl implements LayeredDirectoryNode
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{
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static final long serialVersionUID = 4623043057918181724L;
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/**
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* The layer id.
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*/
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private long fLayerID;
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/**
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* The pointer to the underlying directory.
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*/
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private String fIndirection;
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/**
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* Whether this is a primary indirection node.
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*/
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private boolean fPrimaryIndirection;
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/**
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* Whether this is opaque.
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*/
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private boolean fOpacity;
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/**
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* Default constructor. Called by Hibernate.
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*/
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protected LayeredDirectoryNodeImpl()
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{
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}
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/**
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* Make a new one from a specified indirection path.
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* @param indirection The indirection path to set.
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* @param store The store that owns this node.
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*/
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public LayeredDirectoryNodeImpl(String indirection, AVMStore store, AVMNode toCopy)
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{
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super(store.getAVMRepository().issueID(), store);
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fLayerID = -1;
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fIndirection = indirection;
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fPrimaryIndirection = true;
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fOpacity = false;
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AVMDAOs.Instance().fAVMNodeDAO.save(this);
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AVMDAOs.Instance().fAVMNodeDAO.flush();
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if (toCopy != null)
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{
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copyProperties(toCopy);
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copyACLs(toCopy);
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copyAspects(toCopy);
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}
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}
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/**
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* Kind of copy constructor, sort of.
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* @param other The LayeredDirectoryNode we are copied from.
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* @param repos The AVMStore object we use.
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*/
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@SuppressWarnings("unchecked")
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public LayeredDirectoryNodeImpl(LayeredDirectoryNode other,
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AVMStore repos)
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{
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super(repos.getAVMRepository().issueID(), repos);
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fIndirection = other.getUnderlying();
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fPrimaryIndirection = other.getPrimaryIndirection();
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fLayerID = -1;
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fOpacity = false;
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AVMDAOs.Instance().fAVMNodeDAO.save(this);
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for (ChildEntry child : AVMDAOs.Instance().fChildEntryDAO.getByParent(other))
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{
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ChildKey key = new ChildKey(this, child.getKey().getName());
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ChildEntryImpl newChild = new ChildEntryImpl(key,
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child.getChild());
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AVMDAOs.Instance().fChildEntryDAO.save(newChild);
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}
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AVMDAOs.Instance().fAVMNodeDAO.flush();
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copyProperties(other);
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copyAspects(other);
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copyACLs(other);
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}
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/**
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* Construct one from a PlainDirectoryNode. Called when a COW is performed in a layered
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* context.
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* @param other The PlainDirectoryNode.
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* @param store The AVMStore we should belong to.
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* @param lPath The Lookup object.
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*/
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@SuppressWarnings("unchecked")
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public LayeredDirectoryNodeImpl(PlainDirectoryNode other,
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AVMStore store,
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Lookup lPath,
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boolean copyContents)
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{
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super(store.getAVMRepository().issueID(), store);
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fIndirection = null;
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fPrimaryIndirection = false;
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fLayerID = -1;
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fOpacity = false;
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AVMDAOs.Instance().fAVMNodeDAO.save(this);
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if (copyContents)
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{
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for (ChildEntry child : AVMDAOs.Instance().fChildEntryDAO.getByParent(other))
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{
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ChildKey key = new ChildKey(this, child.getKey().getName());
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ChildEntryImpl newChild = new ChildEntryImpl(key,
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child.getChild());
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AVMDAOs.Instance().fChildEntryDAO.save(newChild);
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}
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}
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AVMDAOs.Instance().fAVMNodeDAO.flush();
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copyProperties(other);
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copyAspects(other);
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copyACLs(other);
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}
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/**
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* Create a new layered directory based on a directory we are being named from
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* that is in not in the layer of the source lookup.
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* @param dir The directory
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* @param store The store
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* @param srcLookup The source lookup.
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* @param name The name of the target.
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*/
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public LayeredDirectoryNodeImpl(DirectoryNode dir,
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AVMStore store,
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Lookup srcLookup,
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String name)
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{
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super(store.getAVMRepository().issueID(), store);
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fIndirection = srcLookup.getIndirectionPath() + "/" + name;
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fPrimaryIndirection = true;
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fLayerID = -1;
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fOpacity = false;
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AVMDAOs.Instance().fAVMNodeDAO.save(this);
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AVMDAOs.Instance().fAVMNodeDAO.flush();
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copyProperties(dir);
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copyAspects(dir);
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copyACLs(dir);
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}
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/**
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* Is this a primary indirection node.
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* @return Whether this is a primary indirection.
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*/
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public boolean getPrimaryIndirection()
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{
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return fPrimaryIndirection;
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}
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/**
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* Set the primary indirection state of this.
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* @param has Whether this is a primary indirection node.
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*/
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public void setPrimaryIndirection(boolean has)
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{
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fPrimaryIndirection = has;
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}
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/**
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* Get the indirection path.
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* @return The indirection path.
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*/
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public String getIndirection()
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{
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return fIndirection;
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}
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public String getUnderlying()
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{
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return fIndirection;
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}
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/**
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* Get the underlying path in the Lookup's context.
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* @param lPath The Lookup.
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* @return The underlying path.
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*/
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public String getUnderlying(Lookup lPath)
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{
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if (fPrimaryIndirection)
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{
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return fIndirection;
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}
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return lPath.getCurrentIndirection();
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}
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/**
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* Get the layer id.
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* @return The layer id.
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*/
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public long getLayerID()
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{
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return fLayerID;
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}
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/**
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* Set the layer id.
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* @param id The id to set.
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*/
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public void setLayerID(long id)
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{
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fLayerID = id;
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}
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/**
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* Copy on write logic.
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* @param lPath
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* @return The copy or null.
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*/
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public AVMNode copy(Lookup lPath)
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{
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// Capture the store.
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AVMStore store = lPath.getAVMStore();
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LayeredDirectoryNodeImpl newMe = null;
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if (!lPath.isInThisLayer())
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{
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// This means that this is being seen indirectly through the topmost
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// layer. The following creates a node that will inherit its
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// indirection from its parent.
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newMe = new LayeredDirectoryNodeImpl((String)null,
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store, this);
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newMe.setPrimaryIndirection(false);
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newMe.setLayerID(lPath.getTopLayer().getLayerID());
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}
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else
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{
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// A simple copy is made.
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newMe = new LayeredDirectoryNodeImpl(this,
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store);
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newMe.setLayerID(getLayerID());
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}
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newMe.setAncestor(this);
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return newMe;
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}
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/**
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* Insert a child node without COW.
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* @param name The name to give the child.
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*/
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public void putChild(String name, AVMNode node)
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{
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if (DEBUG)
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{
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checkReadOnly();
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}
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ChildKey key = new ChildKey(this, name);
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ChildEntry existing = AVMDAOs.Instance().fChildEntryDAO.get(key);
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if (existing != null)
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{
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AVMDAOs.Instance().fChildEntryDAO.delete(existing);
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}
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ChildEntry entry = new ChildEntryImpl(key, node);
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AVMDAOs.Instance().fAVMNodeDAO.flush();
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AVMDAOs.Instance().fChildEntryDAO.save(entry);
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}
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/**
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* Does this node directly contain the indicated node.
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* @param node The node we are checking.
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* @return Whether node is directly contained.
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*/
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public boolean directlyContains(AVMNode node)
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{
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return AVMDAOs.Instance().fChildEntryDAO.getByParentChild(this, node) != null;
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}
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/**
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* Get a listing of the virtual contents of this directory.
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* @param lPath The Lookup.
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* @return A Map from names to nodes. This is a sorted Map.
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*/
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@SuppressWarnings("unchecked")
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public Map<String, AVMNode> getListing(Lookup lPath, boolean includeDeleted)
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{
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// Get the base listing from the thing we indirect to.
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Map<String, AVMNode> listing = null;
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if (fOpacity)
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{
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listing = new HashMap<String, AVMNode>();
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}
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else
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{
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Lookup lookup = AVMRepository.GetInstance().lookupDirectory(-1, getUnderlying(lPath));
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if (lookup != null)
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{
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DirectoryNode dir = (DirectoryNode)lookup.getCurrentNode();
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listing = dir.getListing(lookup, includeDeleted);
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}
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else
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{
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// It's OK for an indirection to dangle.
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listing = new HashMap<String, AVMNode>();
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}
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}
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for (ChildEntry entry : AVMDAOs.Instance().fChildEntryDAO.getByParent(this))
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{
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if (!includeDeleted && entry.getChild().getType() == AVMNodeType.DELETED_NODE)
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{
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listing.remove(entry.getKey().getName());
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}
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else
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{
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listing.put(entry.getKey().getName(), entry.getChild());
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}
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}
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return listing;
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}
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/**
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* Get a listing of the nodes directly contained by a directory.
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* @param lPath The Lookup to this directory.
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* @return A Map of names to nodes.
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*/
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public Map<String, AVMNode> getListingDirect(Lookup lPath, boolean includeDeleted)
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{
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Map<String, AVMNode> listing = new HashMap<String, AVMNode>();
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for (ChildEntry entry : AVMDAOs.Instance().fChildEntryDAO.getByParent(this))
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{
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if (includeDeleted || entry.getChild().getType() != AVMNodeType.DELETED_NODE)
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{
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listing.put(entry.getKey().getName(), entry.getChild());
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}
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}
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return listing;
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}
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/**
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* Get the direct contents of this directory.
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* @param dir The descriptor that describes us.
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* @param includeDeleted Whether to inlude deleted nodes.
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* @return A Map of Strings to descriptors.
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*/
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public SortedMap<String, AVMNodeDescriptor> getListingDirect(AVMNodeDescriptor dir,
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boolean includeDeleted)
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{
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List<ChildEntry> children = AVMDAOs.Instance().fChildEntryDAO.getByParent(this);
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SortedMap<String, AVMNodeDescriptor> listing = new TreeMap<String, AVMNodeDescriptor>();
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for (ChildEntry child : children)
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{
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AVMNode childNode = child.getChild();
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if (!includeDeleted && childNode.getType() == AVMNodeType.DELETED_NODE)
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{
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continue;
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}
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AVMNodeDescriptor childDesc =
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childNode.getDescriptor(dir.getPath(), child.getKey().getName(), dir.getIndirection());
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listing.put(child.getKey().getName(), childDesc);
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}
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return listing;
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}
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/**
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* Get a listing from a directory node descriptor.
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* @param dir The directory node descriptor.
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* @param includeDeleted Should DeletedNodes be shown.
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* @return A Map of names to node descriptors.
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*/
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public SortedMap<String, AVMNodeDescriptor> getListing(AVMNodeDescriptor dir,
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boolean includeDeleted)
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{
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if (dir.getPath() == null || dir.getIndirection() == null)
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{
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throw new AVMBadArgumentException("Illegal null argument.");
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}
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SortedMap<String, AVMNodeDescriptor> baseListing = new TreeMap<String, AVMNodeDescriptor>();
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// If we are not opaque, get the underlying base listing.
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if (!fOpacity)
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{
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Lookup lookup = AVMRepository.GetInstance().lookupDirectory(-1, dir.getIndirection());
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if (lookup != null)
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{
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DirectoryNode dirNode = (DirectoryNode)lookup.getCurrentNode();
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Map<String, AVMNode> listing = dirNode.getListing(lookup, includeDeleted);
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for (String name : listing.keySet())
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{
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baseListing.put(name,
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listing.get(name).getDescriptor(dir.getPath(), name,
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lookup.getCurrentIndirection()));
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}
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}
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}
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List<ChildEntry> children = AVMDAOs.Instance().fChildEntryDAO.getByParent(this);
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for (ChildEntry child : children)
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{
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if (!includeDeleted && child.getChild().getType() == AVMNodeType.DELETED_NODE)
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{
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baseListing.remove(child.getKey().getName());
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}
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else
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{
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baseListing.put(child.getKey().getName(),
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child.getChild().getDescriptor(dir.getPath(),
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child.getKey().getName(),
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dir.getIndirection()));
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}
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}
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return baseListing;
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}
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/**
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* Get the names of nodes deleted in this directory.
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* @return A List of names.
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*/
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public List<String> getDeletedNames()
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{
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List<ChildEntry> children = AVMDAOs.Instance().fChildEntryDAO.getByParent(this);
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List<String> listing = new ArrayList<String>();
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for (ChildEntry entry : children)
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{
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if (entry.getChild().getType() == AVMNodeType.DELETED_NODE)
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{
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listing.add(entry.getKey().getName());
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}
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}
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return listing;
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}
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/**
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* Lookup a child by name.
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* @param lPath The Lookup.
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* @param name The name we are looking.
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* @param version The version in which we are looking.
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* @param write Whether this lookup is occurring in a write context.
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* @return The child or null if not found.
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*/
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@SuppressWarnings("unchecked")
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public AVMNode lookupChild(Lookup lPath, String name, boolean includeDeleted)
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{
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ChildKey key = new ChildKey(this, name);
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ChildEntry entry = AVMDAOs.Instance().fChildEntryDAO.get(key);
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if (entry != null)
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{
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if (!includeDeleted && entry.getChild().getType() == AVMNodeType.DELETED_NODE)
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{
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return null;
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}
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return AVMNodeUnwrapper.Unwrap(entry.getChild());
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}
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// Don't check our underlying directory if we are opaque.
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if (fOpacity)
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{
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return null;
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}
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// Not here so check our indirection.
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Lookup lookup = AVMRepository.GetInstance().lookupDirectory(-1, getUnderlying(lPath));
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if (lookup != null)
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{
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DirectoryNode dir = (DirectoryNode)lookup.getCurrentNode();
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AVMNode retVal = dir.lookupChild(lookup, name, includeDeleted);
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lPath.setFinalStore(lookup.getFinalStore());
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return retVal;
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}
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else
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{
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return null;
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}
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}
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/**
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* Lookup a child using a node descriptor as context.
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* @param mine The node descriptor for this,
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* @param name The name to lookup,
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* @return The node descriptor.
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*/
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public AVMNodeDescriptor lookupChild(AVMNodeDescriptor mine, String name, boolean includeDeleted)
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{
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if (mine.getPath() == null || mine.getIndirection() == null)
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{
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throw new AVMBadArgumentException("Illegal null argument.");
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}
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ChildKey key = new ChildKey(this, name);
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ChildEntry entry = AVMDAOs.Instance().fChildEntryDAO.get(key);
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if (entry != null)
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{
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if (!includeDeleted && entry.getChild().getType() == AVMNodeType.DELETED_NODE)
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{
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return null;
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}
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return entry.getChild().getDescriptor(mine.getPath(),
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name,
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mine.getIndirection());
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}
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// If we are opaque don't check underneath.
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if (fOpacity)
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{
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return null;
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}
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Lookup lookup = AVMRepository.GetInstance().lookupDirectory(-1, mine.getIndirection());
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if (lookup != null)
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{
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DirectoryNode dir = (DirectoryNode)lookup.getCurrentNode();
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|
AVMNode child = dir.lookupChild(lookup, name, includeDeleted);
|
|
if (child == null)
|
|
{
|
|
return null;
|
|
}
|
|
return child.getDescriptor(lookup);
|
|
}
|
|
else
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Directly remove a child. Do not COW. Do not pass go etc.
|
|
* @param lPath The lookup that arrived at this.
|
|
* @param name The name of the child to remove.
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public void removeChild(Lookup lPath, String name)
|
|
{
|
|
if (DEBUG)
|
|
{
|
|
checkReadOnly();
|
|
}
|
|
ChildKey key = new ChildKey(this, name);
|
|
ChildEntry entry = AVMDAOs.Instance().fChildEntryDAO.get(key);
|
|
AVMNode child = null;
|
|
boolean indirect = false;
|
|
if (entry != null)
|
|
{
|
|
child = entry.getChild();
|
|
if (child.getType() == AVMNodeType.DELETED_NODE)
|
|
{
|
|
return;
|
|
}
|
|
AVMDAOs.Instance().fChildEntryDAO.delete(entry);
|
|
}
|
|
else
|
|
{
|
|
child = lookupChild(lPath, name, false);
|
|
indirect = true;
|
|
}
|
|
if (child != null && (indirect || child.getStoreNew() == null || child.getAncestor() != null))
|
|
{
|
|
DeletedNodeImpl ghost = new DeletedNodeImpl(lPath.getAVMStore().getAVMRepository().issueID(),
|
|
lPath.getAVMStore());
|
|
AVMDAOs.Instance().fAVMNodeDAO.save(ghost);
|
|
AVMDAOs.Instance().fAVMNodeDAO.flush();
|
|
ghost.setAncestor(child);
|
|
ghost.setDeletedType(child.getType());
|
|
this.putChild(name, ghost);
|
|
}
|
|
else
|
|
{
|
|
AVMDAOs.Instance().fAVMNodeDAO.flush();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the type of this node.
|
|
* @return The type of this node.
|
|
*/
|
|
public int getType()
|
|
{
|
|
return AVMNodeType.LAYERED_DIRECTORY;
|
|
}
|
|
|
|
/**
|
|
* For diagnostics. Get a String representation.
|
|
* @param lPath The Lookup.
|
|
* @return A String representation.
|
|
*/
|
|
public String toString(Lookup lPath)
|
|
{
|
|
return "[LD:" + getId() + ":" + getUnderlying(lPath) + "]";
|
|
}
|
|
|
|
/**
|
|
* Set the primary indirection. No COW.
|
|
* @param path The indirection path.
|
|
*/
|
|
public void rawSetPrimary(String path)
|
|
{
|
|
if (DEBUG)
|
|
{
|
|
checkReadOnly();
|
|
}
|
|
fIndirection = path;
|
|
fPrimaryIndirection = true;
|
|
}
|
|
|
|
/**
|
|
* Make this node become a primary indirection. COW.
|
|
* @param lPath The Lookup.
|
|
*/
|
|
public void turnPrimary(Lookup lPath)
|
|
{
|
|
if (DEBUG)
|
|
{
|
|
checkReadOnly();
|
|
}
|
|
String path = lPath.getCurrentIndirection();
|
|
rawSetPrimary(path);
|
|
}
|
|
|
|
/**
|
|
* Make this point at a new target.
|
|
* @param lPath The Lookup.
|
|
*/
|
|
public void retarget(Lookup lPath, String target)
|
|
{
|
|
if (DEBUG)
|
|
{
|
|
checkReadOnly();
|
|
}
|
|
rawSetPrimary(target);
|
|
}
|
|
|
|
/**
|
|
* Let anything behind name in this become visible.
|
|
* @param lPath The Lookup.
|
|
* @param name The name to uncover.
|
|
*/
|
|
public void uncover(Lookup lPath, String name)
|
|
{
|
|
if (DEBUG)
|
|
{
|
|
checkReadOnly();
|
|
}
|
|
ChildKey key = new ChildKey(this, name);
|
|
ChildEntry entry = AVMDAOs.Instance().fChildEntryDAO.get(key);
|
|
if (entry.getChild().getType() != AVMNodeType.DELETED_NODE)
|
|
{
|
|
throw new AVMException("One can only uncover deleted nodes.");
|
|
}
|
|
if (entry != null)
|
|
{
|
|
AVMDAOs.Instance().fChildEntryDAO.delete(entry);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the descriptor for this node.
|
|
* @param lPath The Lookup.
|
|
* @return A descriptor.
|
|
*/
|
|
public AVMNodeDescriptor getDescriptor(Lookup lPath, String name)
|
|
{
|
|
BasicAttributes attrs = getBasicAttributes();
|
|
String path = lPath.getRepresentedPath();
|
|
path = AVMNodeConverter.ExtendAVMPath(path, name);
|
|
String indirect = null;
|
|
if (fPrimaryIndirection)
|
|
{
|
|
indirect = fIndirection;
|
|
}
|
|
else
|
|
{
|
|
indirect = AVMNodeConverter.ExtendAVMPath(lPath.getCurrentIndirection(), name);
|
|
}
|
|
return new AVMNodeDescriptor(path,
|
|
name,
|
|
AVMNodeType.LAYERED_DIRECTORY,
|
|
attrs.getCreator(),
|
|
attrs.getOwner(),
|
|
attrs.getLastModifier(),
|
|
attrs.getCreateDate(),
|
|
attrs.getModDate(),
|
|
attrs.getAccessDate(),
|
|
getId(),
|
|
getVersionID(),
|
|
indirect,
|
|
fPrimaryIndirection,
|
|
fLayerID,
|
|
fOpacity,
|
|
-1,
|
|
-1);
|
|
}
|
|
|
|
/**
|
|
* Get the descriptor for this node.
|
|
* @param lPath The Lookup.
|
|
* @return A descriptor.
|
|
*/
|
|
public AVMNodeDescriptor getDescriptor(Lookup lPath)
|
|
{
|
|
BasicAttributes attrs = getBasicAttributes();
|
|
String path = lPath.getRepresentedPath();
|
|
String name = path.substring(path.lastIndexOf("/") + 1);
|
|
return new AVMNodeDescriptor(path,
|
|
name,
|
|
AVMNodeType.LAYERED_DIRECTORY,
|
|
attrs.getCreator(),
|
|
attrs.getOwner(),
|
|
attrs.getLastModifier(),
|
|
attrs.getCreateDate(),
|
|
attrs.getModDate(),
|
|
attrs.getAccessDate(),
|
|
getId(),
|
|
getVersionID(),
|
|
getUnderlying(lPath),
|
|
fPrimaryIndirection,
|
|
fLayerID,
|
|
fOpacity,
|
|
-1,
|
|
-1);
|
|
}
|
|
|
|
/**
|
|
* Get a descriptor for this.
|
|
* @param parentPath The parent path.
|
|
* @param name The name this was looked up with.
|
|
* @param parentIndirection The indirection of the parent.
|
|
* @return The descriptor.
|
|
*/
|
|
public AVMNodeDescriptor getDescriptor(String parentPath, String name, String parentIndirection)
|
|
{
|
|
BasicAttributes attrs = getBasicAttributes();
|
|
String path = parentPath.endsWith("/") ? parentPath + name : parentPath + "/" + name;
|
|
String indirection = null;
|
|
if (fPrimaryIndirection)
|
|
{
|
|
indirection = fIndirection;
|
|
}
|
|
else
|
|
{
|
|
indirection = parentIndirection.endsWith("/") ? parentIndirection + name :
|
|
parentIndirection + "/" + name;
|
|
}
|
|
return new AVMNodeDescriptor(path,
|
|
name,
|
|
AVMNodeType.LAYERED_DIRECTORY,
|
|
attrs.getCreator(),
|
|
attrs.getOwner(),
|
|
attrs.getLastModifier(),
|
|
attrs.getCreateDate(),
|
|
attrs.getModDate(),
|
|
attrs.getAccessDate(),
|
|
getId(),
|
|
getVersionID(),
|
|
indirection,
|
|
fPrimaryIndirection,
|
|
fLayerID,
|
|
fOpacity,
|
|
-1,
|
|
-1);
|
|
}
|
|
|
|
/**
|
|
* Set the indirection.
|
|
* @param indirection
|
|
*/
|
|
public void setIndirection(String indirection)
|
|
{
|
|
fIndirection = indirection;
|
|
}
|
|
|
|
/**
|
|
* Does nothing because LayeredDirectoryNodes can't be roots.
|
|
* @param isRoot
|
|
*/
|
|
public void setIsRoot(boolean isRoot)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Get the opacity of this.
|
|
* @return The opacity.
|
|
*/
|
|
public boolean getOpacity()
|
|
{
|
|
return fOpacity;
|
|
}
|
|
|
|
/**
|
|
* Set the opacity of this, ie, whether it blocks things normally
|
|
* seen through its indirection.
|
|
* @param opacity
|
|
*/
|
|
public void setOpacity(boolean opacity)
|
|
{
|
|
fOpacity = opacity;
|
|
}
|
|
|
|
/**
|
|
* Link a node with the given id into this directory.
|
|
* @param lPath The Lookup for this.
|
|
* @param name The name to give the node.
|
|
* @param toLink The node to link in.
|
|
*/
|
|
public void link(Lookup lPath, String name, AVMNodeDescriptor toLink)
|
|
{
|
|
if (DEBUG)
|
|
{
|
|
checkReadOnly();
|
|
}
|
|
AVMNode node = AVMDAOs.Instance().fAVMNodeDAO.getByID(toLink.getId());
|
|
if (node == null)
|
|
{
|
|
throw new AVMNotFoundException("Not Found: " + toLink.getId());
|
|
}
|
|
if (node.getType() == AVMNodeType.LAYERED_DIRECTORY &&
|
|
!((LayeredDirectoryNode)node).getPrimaryIndirection())
|
|
{
|
|
throw new AVMBadArgumentException("Non primary layered directories cannot be linked.");
|
|
}
|
|
// Look for an existing child of that name.
|
|
AVMNode existing = lookupChild(lPath, name, true);
|
|
ChildKey key = new ChildKey(this, name);
|
|
if (existing != null)
|
|
{
|
|
if (existing.getType() != AVMNodeType.DELETED_NODE)
|
|
{
|
|
// If the existing child is not a DELETED_NODE it's an error.
|
|
throw new AVMExistsException(name + " exists.");
|
|
}
|
|
// Only if the existing DELETED_NODE child exists directly in this
|
|
// directory do we delete it.
|
|
if (directlyContains(existing))
|
|
{
|
|
ChildEntry entry = AVMDAOs.Instance().fChildEntryDAO.get(key);
|
|
AVMDAOs.Instance().fChildEntryDAO.delete(entry);
|
|
AVMDAOs.Instance().fAVMNodeDAO.flush();
|
|
}
|
|
}
|
|
// Make the new ChildEntry and save.
|
|
ChildEntry newChild = new ChildEntryImpl(key, node);
|
|
AVMDAOs.Instance().fChildEntryDAO.save(newChild);
|
|
}
|
|
|
|
/**
|
|
* Remove name without leaving behind a deleted node.
|
|
* @param name The name of the child to flatten.
|
|
*/
|
|
public void flatten(String name)
|
|
{
|
|
if (DEBUG)
|
|
{
|
|
checkReadOnly();
|
|
}
|
|
ChildKey key = new ChildKey(this, name);
|
|
ChildEntry entry = AVMDAOs.Instance().fChildEntryDAO.get(key);
|
|
if (entry != null)
|
|
{
|
|
AVMDAOs.Instance().fChildEntryDAO.delete(entry);
|
|
}
|
|
}
|
|
}
|