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/repo/avm/hibernate/ChildEntryDAOHibernate.java

@@ -92,6 +92,20 @@ class ChildEntryDAOHibernate extends HibernateDaoSupport implements
         return (ChildEntry)query.uniqueResult();
     }
 
+    /**
+     * Get all the ChildEntries corresponding to the given child.
+     * @param child The child for which to look up entries.
+     * @return The matching entries.
+     */
+    @SuppressWarnings("unchecked")
+    public List<ChildEntry> getByChild(AVMNode child)
+    {
+        Query query = getSession().createQuery("from ChildEntryImpl ce " +
+                                               "where ce.child = :child");
+        query.setEntity("child", child);
+        return (List<ChildEntry>)query.list();
+    }
+
     /**
      * Update a dirty ChildEntry.
      * @param child The dirty entry.