package com.vincent.rsf.server.common.utils;


import java.io.Serializable;
import java.util.function.Function;

/**
 * Created by vincent on 2021/1/19
 */
public class NodeUtils {

    public StringBuilder path = new StringBuilder();

    public StringBuilder pathName = new StringBuilder();

    public interface NodeSupport<T> {
        T query(T t);
    }

    public <T, R extends Serializable> void generatePath0(
            NodeSupport<T> support
            , T t
            , Function<? super T, ? extends Long> idMapper
            , Function<? super T, ? extends String> nameMapper
            , Function<? super T, ? extends Long> parentIdMapper) {
        T parent = support.query(t);
        if (null != parent) {
            path.insert(0, idMapper.apply(parent)).insert(0,",");
            pathName.insert(0, nameMapper.apply(parent)).insert(0,",");
            if (parentIdMapper.apply(parent) != null && parentIdMapper.apply(parent) != 0) {
                generatePath0(support, parent, idMapper, nameMapper, parentIdMapper);
            } else {
                path.deleteCharAt(0);
                pathName.deleteCharAt(0);
            }
        }
    }


}