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


import jp.ac.u_ryukyu.ie.cr.jungle.store.impl.logger.LoggingNode;
import jp.ac.u_ryukyu.ie.cr.jungle.store.impl.logger.OperationLog;
import jp.ac.u_ryukyu.ie.cr.jungle.util.Error;
import jp.ac.u_ryukyu.ie.cr.jungle.store.impl.TreeNode;
import jp.ac.u_ryukyu.ie.cr.jungle.util.DefaultEither;
import jp.ac.u_ryukyu.ie.cr.jungle.util.Either;

public class DeleteChildAt implements NodeEditor
{
	private final int pos;
	public DeleteChildAt(int _pos)
	{
		pos = _pos;
	}

	public Either<Error,LoggingNode> _edit(LoggingNode logNode)
	{
		Either<jp.ac.u_ryukyu.ie.cr.jungle.util.Error,LoggingNode> either = logNode.getChildren().deleteChildAt(pos);
		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);
	}

}