Having managed to get WCM-DEV royally screwed up, I made a new branch,

WCM-DEV2 and added back my changes.  


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@2804 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/LayeredFileNode.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2006 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific
+ * language governing permissions and limitations under the
+ * License.
+ */
+
+package org.alfresco.repo.avm;
+
+import org.alfresco.error.AlfrescoRuntimeException;
+import org.alfresco.repo.avm.hibernate.LayeredFileNodeBean;
+
+/**
+ * A LayeredFileNode behaves like a copy on write symlink.
+ * @author britt
+ */
+public class LayeredFileNode extends FileNode
+{
+    /**
+     * The data bean.
+     */
+    private LayeredFileNodeBean fData;
+    
+    /**
+     * Construct one from its data bean.
+     */
+    public LayeredFileNode(LayeredFileNodeBean data)
+    {
+        fData = data;
+        setDataBean(fData);
+    }
+    
+    /**
+     * Basically a copy constructor.
+     * @param other The file to make a copy of.
+     * @param repo The repository that contains us.
+     */
+    public LayeredFileNode(LayeredFileNode other, Repository repo)
+    {
+        // TODO Something.
+    }
+
+    public LayeredFileNode(FileNode file,
+                             Repository repos,
+                             Lookup srcLookup,
+                             String name)
+    {
+        // TODO Something.
+    }
+
+    
+    /**
+     * Set the repository after a copy.
+     * @param parent The parent after copying.
+     */
+    public void handlePostCopy(DirectoryNode parent)
+    {
+        if (parent != null)
+        {
+            setRepository(parent.getRepository());
+        }
+    }
+    
+    /**
+     * Copy on write logic.
+     * @param lPath The path by which this was found.
+     */
+    public AVMNode possiblyCopy(Lookup lPath)
+    {
+        // LayeredFileNodes are always copied.
+        PlainFileNode newMe = new PlainFileNode(getRepository());
+        newMe.setAncestor(this);
+        return newMe;
+    }
+    
+    /**
+     * Get the type of this node.
+     * @return The type.
+     */
+    public AVMNodeType getType()
+    {
+        return AVMNodeType.LAYERED_FILE;
+    }
+
+    /**
+     * Get the content of the specified version.
+     * @return A FileContent object.
+     */
+    public FileContent getContentForRead(int version)
+    {
+        Lookup lookup = getRepository().getSuperRepository().lookup(version, fData.getIndirection());
+        AVMNode node = lookup.getCurrentNode();
+        if (!(node instanceof FileNode))
+        {
+            throw new AlfrescoRuntimeException("Missing Link.");
+        }
+        FileNode file = (FileNode)node;
+        return file.getContentForRead(version);
+    }
+
+    /**
+     * Get File Content for writing.  Should never be called.
+     */
+    public FileContent getContentForWrite(Repository repo)
+    {
+        assert false : "Never happens";
+        return null;
+    }
+}