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package me.youm.frame.webmvc.tree;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import lombok.Data;

import java.util.ArrayList;
import java.util.List;

/**
 * 树根节点
 * @author youta
 */
@Data
public class TreeNode implements INode {

    /**
     * 主键ID
     */
    @JsonSerialize(using = ToStringSerializer.class)
    protected Long id;

    /**
     * 父节点ID
     */
    @JsonSerialize(using = ToStringSerializer.class)
    protected Long parentId;

    /**
     * 子孙节点
     */
    @JsonInclude(JsonInclude.Include.NON_EMPTY)
    protected List children = new ArrayList<>();

    /**
     * 是否有子孙节点
     */
    @JsonInclude(JsonInclude.Include.NON_EMPTY)
    private Boolean hasChildren;

    /**
     * 是否有子孙节点
     *
     * @return Boolean
     */
    @Override
    public Boolean getHasChildren() {
        if (children.size() > 0) {
            return true;
        } else {
            return this.hasChildren;
        }
    }
}