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

import jp.ac.u_ryukyu.ie.cr.jungle.store.Command;
import jp.ac.u_ryukyu.ie.cr.jungle.transaction.node.TreeNode;
import jp.ac.u_ryukyu.ie.cr.jungle.transaction.node.TreeNodeChildren;
import jp.ac.u_ryukyu.ie.cr.jungle.util.Either;
import jp.ac.u_ryukyu.ie.cr.jungle.util.jungleError.Error;

import java.nio.ByteBuffer;

/**
 * Created by e115731 on 2017/01/04.
 */
public class RedBlackTreeDeleteChildAtOperation implements NodeOperation {

    private String key;
    private ByteBuffer value;

    public RedBlackTreeDeleteChildAtOperation(String key, ByteBuffer value) {
        this.key = key;
        this.value = value;
    }

    @Override
    public Command getCommand() {
        return Command.APPEND_CHILD_AND_PUT_ATTRIBUTE;
    }

    @Override
    public Either<Error, TreeNode> invoke(TreeNode target) {
        TreeNodeChildren children = target.getChildren();
        return children.matchingChildDeleteAt(key, value);
    }

    @Override
    public int getPosition() {
        return -2;
    }

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

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