--- a/src/jungle/test/codesegment/practice/ShowAttribute.java	Sun Jun 30 04:32:37 2013 +0900
+++ b/src/jungle/test/codesegment/practice/ShowAttribute.java	Sun Jun 30 10:56:19 2013 +0900
@@ -47,7 +47,8 @@
 		Node node = tree.getRootNode();
 		Children<Node> chs = node.getChildren();
 		for(Node n : chs) {
-			System.out.println(n.getAttributes().get("key1"));
+			ByteBuffer b = n.getAttributes().get("key1");
+			System.out.println(new String(b.array()));
 		}
 		
 		System.exit(0);

--- a/src/jungle/test/codesegment/practice/TestPutAttributeCodeSegment.java	Sun Jun 30 04:32:37 2013 +0900
+++ b/src/jungle/test/codesegment/practice/TestPutAttributeCodeSegment.java	Sun Jun 30 10:56:19 2013 +0900
@@ -52,8 +52,23 @@
 		}
 		Jungle jungle = new JungleManager().getJungle();
 		JungleTree tree = jungle.getTreeByName("tree");
-		NetworkDefaultJungleTreeEditor editor = (NetworkDefaultJungleTreeEditor) tree.getTreeEditor();
-		edit(editor, convertedOp);
+		JungleTreeEditor ed = tree.getTreeEditor();
+		DefaultNodePath root = new DefaultNodePath();
+		Either<Error,JungleTreeEditor> r = ed.addNewChildAt(root, 0);
+		if(r.isA()) {
+			throw new IllegalStateException();
+		}
+		ed = r.b();
+		ed.success();
+		
+		
+			
+		NetworkDefaultJungleTreeEditor nEditor = (NetworkDefaultJungleTreeEditor) tree.getTreeEditor();
+		Either<Error,JungleTreeEditor>  either = edit(nEditor, convertedOp);
+		if(either.isA()) {
+			throw new IllegalStateException();
+		}
+		JungleTreeEditor editor = either.b();
 		editor.success();
 		if (arg1.index >= 10) {
 			new ShowAttribute();
@@ -82,7 +97,7 @@
 		return treeOp;
 	}
 	
-	public void edit(JungleTreeEditor editor, TreeOperation op) {
+	public Either<Error, JungleTreeEditor> edit(JungleTreeEditor editor, TreeOperation op) {
 		NodePath path = op.getNodePath();
 		NodeOperation nodeOp = op.getNodeOperation();
 		Command c = nodeOp.getCommand();
@@ -98,26 +113,18 @@
 			} else {
 				str = String.format("key:%s,value:%d", key, value.limit());
 			}
-			editor.putAttribute(path, key, value);
-			break;
+			return editor.putAttribute(path, key, value);
 		case DELETE_ATTRIBUTE:
 			key = nodeOp.getKey();
 			str = String.format("key:%s", nodeOp.getKey());
-			editor.deleteAttribute(path, key);
-			break;
+			return editor.deleteAttribute(path, key);
 		case APPEND_CHILD:
 			str = String.format("pos:%d", nodeOp.getPosition());
-			editor.addNewChildAt(path, 0);
-			break;
+			return editor.addNewChildAt(path, 0);
 		case DELETE_CHILD:
 			str = String.format("pos:%d", nodeOp.getPosition());
-			editor.deleteChildAt(path, 0);
-			break;
+			return editor.deleteChildAt(path, 0);
 		}
-		System.out.println(String.format("[%s:%s]", c,  str));
-		System.out.println("path:");
-		for (int i: path ) {
-			System.out.println(i);
-		}
+		return null;
 	}
 }