iotc/ruoyi-common/src/main/java/com/ruoyi/common/utils/TreeBuildUtils.java

package com.ruoyi.common.utils;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.lang.tree.Tree;
import cn.hutool.core.lang.tree.TreeNodeConfig;
import cn.hutool.core.lang.tree.TreeUtil;
import cn.hutool.core.lang.tree.parser.NodeParser;
import com.ruoyi.common.utils.reflect.ReflectUtils;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;

import java.util.List;

/**
 * 扩展 hutool TreeUtil 封装系统树构建
 *
 * @author Lion Li
 */
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class TreeBuildUtils extends TreeUtil {

    /**
     * 根据前端定制差异化字段
     */
    public static final TreeNodeConfig DEFAULT_CONFIG = TreeNodeConfig.DEFAULT_CONFIG.setNameKey("label");

    public static <T, K> List<Tree<K>> build(List<T> list, NodeParser<T, K> nodeParser) {
        if (CollUtil.isEmpty(list)) {
            return null;
        }
        K k = ReflectUtils.invokeGetter(list.get(0), "parentId");
        return TreeUtil.build(list, k, DEFAULT_CONFIG, nodeParser);
    }

}