--- a/src/treecms/memory/OnMemoryForest.java	Fri Feb 18 02:14:10 2011 +0900
+++ b/src/treecms/memory/OnMemoryForest.java	Thu Feb 24 21:30:18 2011 +0900
@@ -6,6 +6,7 @@
 import java.util.concurrent.ConcurrentHashMap;
 import treecms.api.Forest;
 import treecms.api.Node;
+import treecms.api.NodeData;
 import treecms.api.NodeID;
 import treecms.tree.id.RandomNodeID;
 
@@ -18,16 +19,12 @@
 		m_table = new ConcurrentHashMap<NodeID,OnMemoryNode>();
 	}
 	
-	public OnMemoryNode createNode(NodeID _id)
+	public OnMemoryNode createNode(NodeID _id,NodeData _newData)
 	{
-		OnMemoryNode newNode;
-		if(_id == null){
-			newNode = new OnMemoryNode(this,createID());
-		}else{
-			newNode = new OnMemoryNode(this,_id);
-		}
-		m_table.put(newNode.getID(),newNode);
-		
+		NodeID newID = (_id != null) ? _id : createID();
+		NodeData newData = (_newData != null) ? _newData : new NodeData();
+		OnMemoryNode newNode = new OnMemoryNode(this,newID,newData);
+		m_table.put(newID,newNode);
 		return newNode;
 	}
 	
@@ -45,7 +42,7 @@
 	@Override
 	public Node create()
 	{
-		return createNode(null);
+		return createNode(null,null);
 	}
 	
 	class RandomNodeIDImpl extends RandomNodeID