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

import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.DefaultOperationLog;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.OperationLog;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.DeleteAttributeOperation;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;

public class DeleteAttribute implements NodeEditor
{
	private final String key;
	
	public DeleteAttribute(String _key)
	{
		key = _key;
	}

	@Override
	public <T extends TreeNode> Either<Error,TreeNode> edit(T _e)
	{
		return _e.getAttributes().delete(key);
	}

	@Override
	public OperationLog getLog() {
		OperationLog op = new DefaultOperationLog();
		DeleteAttributeOperation deleteAttribute = new DeleteAttributeOperation(key);
		return op.add(deleteAttribute);
	}
}