Merged DEV/CHECK_EXISTS to HEAD

svn merge svn://www.alfresco.org:3691/alfresco/BRANCHES/DEV/CHECK_EXISTS@3442 svn://www.alfresco.org:3691/alfresco/BRANCHES/DEV/CHECK_EXISTS@3590 .

TODO: Fix bug raising incorrect exception during UI paste of same-named file
Note:
- Added a new method to NodeService to get child by name
- Added a new method to FileFolderService to perform fast, direct lookups based on name


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@3591 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/version/NodeServiceImpl.java

@@ -442,6 +442,15 @@ public class NodeServiceImpl implements NodeService, VersionModel
         return result;
     }
     
+    /**
+     * @throws UnsupportedOperationException always
+     */
+    public NodeRef getChildByName(NodeRef nodeRef, QName assocTypeQName, String childName)
+    {
+        // This operation is not supported for a verion store
+        throw new UnsupportedOperationException(MSG_UNSUPPORTED);
+    }
+
     /**
      * Simulates the node begin attached ot the root node of the version store. 
      */