package jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.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.impl.TreeNode;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;


public class PutAttributeOperation implements NodeOperation
{
	private final String key;
	private final ByteBuffer value;
	
	public PutAttributeOperation(String _key,ByteBuffer _value)
	{
		key = _key;
		value = _value;
	}
	
	@Override
	public Command getCommand()
	{
		return Command.PUT_ATTRIBUTE;
	}
	
	@Override
	public Either<Error,TreeNode> invoke(TreeNode _target)
	{
		return _target.getAttributes().put(key,value);
	}
	@Override
	public int getPosition()
	{
		return -1;
	}

	@Override
	public String getKey()
	{
		return key;
	}

	@Override
	public ByteBuffer getValue()
	{
		return value;
	}
}