001/* 002 * Copyright 2012-2018 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.boot.json; 018 019import java.util.List; 020import java.util.Map; 021 022import com.google.gson.Gson; 023import com.google.gson.GsonBuilder; 024import com.google.gson.reflect.TypeToken; 025 026/** 027 * Thin wrapper to adapt {@link Gson} to a {@link JsonParser}. 028 * 029 * @author Dave Syer 030 * @author Jean de Klerk 031 * @since 1.2.0 032 * @see JsonParserFactory 033 */ 034public class GsonJsonParser extends AbstractJsonParser { 035 036 private static final TypeToken<?> MAP_TYPE = new MapTypeToken(); 037 038 private static final TypeToken<?> LIST_TYPE = new ListTypeToken(); 039 040 private Gson gson = new GsonBuilder().create(); 041 042 @Override 043 public Map<String, Object> parseMap(String json) { 044 return parseMap(json, 045 (trimmed) -> this.gson.fromJson(trimmed, MAP_TYPE.getType())); 046 } 047 048 @Override 049 public List<Object> parseList(String json) { 050 return parseList(json, 051 (trimmed) -> this.gson.fromJson(trimmed, LIST_TYPE.getType())); 052 } 053 054 private static final class MapTypeToken extends TypeToken<Map<String, Object>> { 055 056 } 057 058 private static final class ListTypeToken extends TypeToken<List<Object>> { 059 060 } 061 062}