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package com.olapdb.obase.utils;

import java.util.Map;

public class MapUtil {
    public static Map addToMap1(
            Map a,
            Map b){
        b.entrySet().stream().forEach(e->{
            a.put(e.getKey(), a.getOrDefault(e.getKey(),0) + e.getValue());
        });

        return a;
    }

    public static Map> addToMap2(
            Map> a,
            Map> b){
        b.entrySet().stream().forEach(e->{
            String cateory = e.getKey();
            if(!a.containsKey(cateory)){
                a.put(cateory, e.getValue());
            }else{
                Map target = a.get(cateory);
                addToMap1(target, e.getValue());
            }
        });

        return a;
    }
}