--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/alice/jungle/datasegment/store/transformer/NetworkAppendChildAt.java	Fri Oct 11 18:24:46 2013 +0900
@@ -0,0 +1,35 @@
+package alice.jungle.datasegment.store.transformer;
+
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.trasnformer.EditableNode;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.trasnformer.NodeEditor;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultEither;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
+
+import org.msgpack.annotation.Message;
+
+
+/*
+ * This code same AppendChildAt. 
+ */
+
+@Message
+public class NetworkAppendChildAt implements NodeEditor {
+
+	private final int pos;
+	
+	public NetworkAppendChildAt(int _pos) {
+		pos = _pos;
+	}
+
+	@Override
+	public <T extends EditableNode<T>> Either<Error, T> edit(T _e) {
+		Either<Error,T> either = _e.getChildren().addNewChildAt(pos);
+		if(either.isA()){
+			// error
+			return either;
+		}
+		return DefaultEither.newB(either.b());
+	}
+
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/alice/jungle/operations/NetworkAppendChildAtOperation.java	Fri Oct 11 18:24:46 2013 +0900
@@ -0,0 +1,55 @@
+package alice.jungle.operations;
+
+import java.nio.ByteBuffer;
+
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.Command;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.NodeOperation;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.trasnformer.EditableNode;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
+
+import org.msgpack.annotation.Message;
+
+import alice.jungle.datasegment.store.transformer.NetworkAppendChildAt;
+
+
+@Message
+public class NetworkAppendChildAtOperation implements NodeOperation {
+	
+	//	private final int pos;
+	/* MessagePack can not handle final.*/
+	private int pos;
+	
+	/* Position -1 represent root position. */
+	public NetworkAppendChildAtOperation() { pos = -2; }
+	
+	public NetworkAppendChildAtOperation(int _pos) {
+		pos = _pos;
+	}
+	
+	@Override
+	public Command getCommand() {
+		return Command.APPEND_CHILD;
+	}
+	
+	@Override
+	public <T extends EditableNode<T>> Either<Error, T> invoke(T _target) {
+		NetworkAppendChildAt appendChildAt = new NetworkAppendChildAt(pos);
+		return appendChildAt.edit(_target);
+	}
+
+	@Override
+	public int getPosition() {
+		return pos;
+	}
+
+	@Override
+	public String getKey() {
+		return null;
+	}
+
+	@Override
+	public ByteBuffer getValue() {
+		return null;
+	}
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/test/alice/jungle/core/operations/NetworkAppendChildOperationTest.java	Fri Oct 11 18:24:46 2013 +0900
@@ -0,0 +1,25 @@
+package test.alice.jungle.core.operations;
+
+import java.io.IOException;
+
+import org.msgpack.MessagePack;
+import org.msgpack.type.Value;
+
+import alice.jungle.operations.NetworkAppendChildAtOperation;
+import junit.framework.TestCase;
+
+public class NetworkAppendChildOperationTest extends TestCase {
+
+	public void testMsgpackConvert() throws IOException {
+		NetworkAppendChildAtOperation op = new NetworkAppendChildAtOperation(1);
+		MessagePack msgpack = new MessagePack();
+		Value v = msgpack.unconvert(op);
+		NetworkAppendChildAtOperation mOp = msgpack.convert(v, NetworkAppendChildAtOperation.class);
+		assertEquals(op.getCommand(), mOp.getCommand());
+		assertEquals(op.getPosition(), 1);
+		assertEquals(op.getPosition(), mOp.getPosition());
+
+	}
+	
+	
+}