package jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.trasnformer;

import java.nio.ByteBuffer;

import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.LoggingNode;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.OperationLog;
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;

public class PutAttribute implements NodeEditor
{
	private final String key;
	private final ByteBuffer value;
	
	public PutAttribute(String _key,ByteBuffer _value)
	{
		key = _key;
		value = _value;
	}

	public Either<Error,LoggingNode> _edit(LoggingNode _e)
	{
		Either<Error,LoggingNode> either = _e.getAttributes().put(key,value);
		if(either.isA()){
			// error
			return either;
		}
		return DefaultEither.newB(either.b());
	}

	@Override
	public Either<Error, LoggingNode> edit(TreeNode _e) {
		LoggingNode logNode = wrap(_e);
		return _edit(logNode);
	}

	public LoggingNode wrap(TreeNode node) {
		return new LoggingNode(node);
	}

	@Override
	public LoggingNode wrap(TreeNode node, OperationLog op) {
		return new LoggingNode(node, op);
	}

}