--- a/src/treecms/proto/test/PreOrderTreeWalkerRecursive1.java	Mon Aug 30 00:48:50 2010 +0900
+++ b/src/treecms/proto/test/PreOrderTreeWalkerRecursive1.java	Mon Aug 30 02:44:50 2010 +0900
@@ -1,5 +1,88 @@
 package treecms.proto.test;
+import java.util.Iterator;
+import java.util.LinkedList;
+
+import treecms.proto.api.NodeAPI;
+import treecms.proto.simple.SimpleNodeAPI;
+
+public class PreOrderTreeWalkerRecursive1 implements Iterable<NodeAPI>
+{
+	private NodeAPI m_root;
+	
+	public PreOrderTreeWalkerRecursive1(NodeAPI _root)
+	{
+		m_root = _root;
+	}
+
+	@Override
+	public Iterator<NodeAPI> iterator()
+	{
+		return new PreOrderRecursiveIterator(m_root);
+	}
 
-public class PreOrderTreeWalkerRecursive1 {
+	class PreOrderRecursiveIterator implements Iterator<NodeAPI>
+	{
+		private LinkedList<NodeAPI> nextList;
+		
+		public PreOrderRecursiveIterator(NodeAPI _root)
+		{
+			nextList = new LinkedList<NodeAPI>();
+			getChildren(_root, nextList);
+		}
+		
+		void getChildren(NodeAPI node, LinkedList<NodeAPI>list) {
+			list.add(node);
+			for(NodeAPI child : node.getChildList()){
+				getChildren(child,list);
+			}
+		}
+		
+		@Override
+		public boolean hasNext()
+		{
+			return !nextList.isEmpty();
+		}
+
+		@Override
+		public NodeAPI next()
+		{
+			return nextList.poll();
+		}
+
+		@Override
+		public void remove()
+		{
+			throw new UnsupportedOperationException("cant remove from itrerator");
+		}
+	}
+	
+	public LinkedList<NodeAPI> findPath(NodeAPI root, NodeAPI node) {
+		LinkedList<NodeAPI> list = new LinkedList<NodeAPI>();
+		list.addFirst(root);
+		findPath(root,node,list);
+		return list;
+	}
+
+	private boolean findPath(NodeAPI root, NodeAPI node, LinkedList<NodeAPI> list) {
+		if (root==node) return true;
+		for(NodeAPI child : node.getChildList()){
+			if (findPath(child,node,list)) {
+				list.addFirst(child);
+				return true;
+			}
+		}
+		return false; // backtrack
+	}
+	
+	public NodeAPI cloneTree(LinkedList<NodeAPI> path) {
+			NodeAPI old = path.poll();
+			NodeAPI node = new SimpleNodeAPI(old.getTitle());
+			node.setClassName(old.getClassName());
+			for(NodeAPI child: old.getChildList()) {
+				if (child==old && !path.isEmpty()) child = cloneTree(path);
+				node.getChildList().add(child);
+			}
+			return node;
+		}
 
 }