Added missing callbacks to AVMNodeService. This makes things slow.

Have to do something about that.
Added getPaths call to AVMService.  Retrieves all possible paths to a node.
Need to do timing tests.
I believe, the 6th version of a Pair template class. This one's public and 
perhaps when we have time we could use it in place of all the inner class
implementations.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3964 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/service/cmr/avm/AVMService.java

@@ -27,6 +27,7 @@ import java.util.SortedMap;
 import org.alfresco.repo.domain.PropertyValue;
 import org.alfresco.service.cmr.repository.ContentData;
 import org.alfresco.service.namespace.QName;
+import org.alfresco.util.Pair;
 
 /**
  * This is the service interface for the [Alfresco|Addled|Advanced|Aleatoric|Apotheosed|Awful] 
@@ -407,6 +408,13 @@ public interface AVMService
      */
     public AVMNodeDescriptor lookup(AVMNodeDescriptor dir, String name, boolean includeDeleted);
     
+    /**
+     * Get a list of all paths that a given node has.
+     * @param desc The node descriptor to get paths for.
+     * @return A List of version, path Pairs.
+     */
+    public List<Pair<Integer, String>> getPaths(AVMNodeDescriptor desc);
+    
     /**
      * Get the indirection path for a node in a layered context.
      * @param version The version number to get.