--- a/src/treecms/tree/cassandra/v1/CassandraForest.java	Tue Mar 01 01:29:59 2011 +0900
+++ b/src/treecms/tree/cassandra/v1/CassandraForest.java	Mon Mar 14 23:24:38 2011 +0900
@@ -1,6 +1,7 @@
 package treecms.tree.cassandra.v1;
 
 import java.util.HashMap;
+
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
@@ -33,7 +34,7 @@
 import treecms.api.Node;
 import treecms.api.NodeData;
 import treecms.api.NodeID;
-import treecms.tree.id.RandomNodeID;
+import treecms.tree.id.AbstractRandomNodeID;
 
 /**
  * implementation of TreeCMS with Cassandra backend.
@@ -333,15 +334,15 @@
 	
 	public NodeID createID(String _uuid,String _version)
 	{
-		return new RandomNodeIDImpl(_uuid,_version);
+		return new RandomNodeID(_uuid,_version);
 	}
 	
-	class RandomNodeIDImpl extends RandomNodeID
+	class RandomNodeID extends AbstractRandomNodeID
 	{
 		String m_uuid;
 		String m_version;
 		
-		public RandomNodeIDImpl(String _uuid,String _version)
+		public RandomNodeID(String _uuid,String _version)
 		{
 			m_uuid = (_uuid != null) ? _uuid : UUID.randomUUID().toString();
 			m_version = (_version != null) ? _version : Long.toHexString((new Random()).nextLong());
@@ -350,13 +351,13 @@
 		@Override
 		public NodeID create()
 		{
-			return new RandomNodeIDImpl(null,null);
+			return new RandomNodeID(null,null);
 		}
 
 		@Override
 		public NodeID update()
 		{
-			return new RandomNodeIDImpl(m_uuid,null);
+			return new RandomNodeID(m_uuid,null);
 		}
 
 		@Override