TreeNodePosition.java

/*
 * Copyright 2011-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package kr.debop4j.data.model;

import com.google.common.base.Objects;
import kr.debop4j.core.Guard;
import kr.debop4j.core.ValueObjectBase;
import kr.debop4j.core.tools.HashTool;
import lombok.Getter;
import lombok.Setter;

import javax.persistence.Column;
import javax.persistence.Embeddable;

/**
 * 트리 형식의 자료 구조의 하나의 노드의 위치를 나타냅니다.
 *
 * @author 배성혁 ( sunghyouk.bae@gmail.com )
 * @since 12. 9. 13.
 */
@Embeddable
@Getter
@Setter
public class TreeNodePosition extends ValueObjectBase {

    @Column(name = "TreeLevel")
    private Integer level;

    @Column(name = "TreeOrder")
    private Integer order;

    public TreeNodePosition() {
        this(0, 0);
    }

    public TreeNodePosition(Integer level, Integer order) {
        this.level = level;
        this.order = order;
    }

    public TreeNodePosition(TreeNodePosition nodePosition) {
        Guard.shouldNotBeNull(nodePosition, "nodePosition");
        this.level = nodePosition.level;
        this.order = nodePosition.order;
    }

    public void setPosition(int level, int order) {
        this.level = level;
        this.order = order;
    }

    public void setPosition(TreeNodePosition nodePosition) {
        Guard.shouldNotBeNull(nodePosition, "nodePosition");
        this.level = nodePosition.level;
        this.order = nodePosition.order;
    }

    @Override
    public int hashCode() {
        return HashTool.compute(level, order);
    }

    @Override
    protected Objects.ToStringHelper buildStringHelper() {
        return super.buildStringHelper()
                .add("level", level)
                .add("order", order);
    }

    private static final long serialVersionUID = 7724440843329055902L;
}