--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/alice/jungle/persistence/JungleUpdater.java	Mon Oct 28 17:21:56 2013 +0900
@@ -0,0 +1,58 @@
+package alice.jungle.persistence;
+
+import java.nio.ByteBuffer;
+
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.JungleTreeEditor;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.Command;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.DefaultNodePath;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.TreeOperationLog;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.NodeOperation;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
+import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
+
+public class JungleUpdater {
+
+	public JungleUpdater() {
+		
+	}
+	
+	public static Either<Error, JungleTreeEditor> edit(JungleTreeEditor _editor ,TreeOperationLog _log) {
+		JungleTreeEditor editor = _editor;
+		Either<Error, JungleTreeEditor> either = null;
+		for (TreeOperation op : _log) { 
+			either = _edit(editor, op);
+			if(either.isA()) {
+				return either;
+			}
+			editor = either.b();
+		}
+		return either;
+	}
+	
+	private static Either<Error, JungleTreeEditor> _edit(JungleTreeEditor editor,
+			TreeOperation op) {
+		DefaultNodePath path = new DefaultNodePath();
+		NodeOperation nodeOp = op.getNodeOperation();
+		int pos = nodeOp.getPosition();
+		Command c = nodeOp.getCommand();
+		String key = "";
+		switch (c) {
+		case PUT_ATTRIBUTE:
+			key = nodeOp.getKey();
+			ByteBuffer value = nodeOp.getValue();
+			return editor.putAttribute(path, key, value);
+		case DELETE_ATTRIBUTE:
+			key = nodeOp.getKey();
+			return editor.deleteAttribute(path, key);
+		case APPEND_CHILD:
+			return editor.addNewChildAt(path, pos);
+		case DELETE_CHILD:
+			return editor.deleteChildAt(path, 0);
+		}
+		return null;
+	}	
+	
+	
+	
+}