common-utils

class MapBuilder

快速的构建Map<K,V>实例 Easy to build a Map<K,V> instance.

Usage

create the builder

MapBuilder<String, String> builder = 
  MapBuilder.begin("hello", "world");

use method begin to create a MapBuilder instance, and indicate the generic type of the Map<K,V>, the arguments of method begin will be the first Entry in the Map

add more entries

builder.and("good", "bye")
  .and("fine", "thank u")
  .and("ni", "hao");

get the builded map

Map<String, String> map = builder.build();

what about types beside String

type of MapBuilder<K,V> is decided by the arguments' type of method begin

MapBuilder<String, Integer> builder = 
  MapBuilder.begin("hello", 100);

MapBuilder<String, Object> builder = 
  MapBuilder.begin("a-key", (Object) "haha"));

why u say Easy

somewhere u need a map

MapBuilder.begin("example", (Object) "1")
  .and("num", 100)
  .and("disabled", false)
  .and("params", MapBuilder.begin("param1", (Object) "nothing")
                  .and("param2", new int[]{0, 1, 2})
                  .and("bool", true)
                  .and("counter", new Integer(5))
                  .build())
  .and("ending", true)
  .build();

u can get a Map like:

{
  "example": "1",
  "num": 100,
  "disabled": false,
  "params": {
    "param1": "nothing",
    "param2": [0, 1, 2],
    "bool": true,
    "counter": 5
  },
  "ending": true
}

try it!