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 org.springframework.util.ClassUtils; 020 021/** 022 * Factory to create a {@link JsonParser}. 023 * 024 * @author Dave Syer 025 * @see JacksonJsonParser 026 * @see GsonJsonParser 027 * @see YamlJsonParser 028 * @see BasicJsonParser 029 */ 030public abstract class JsonParserFactory { 031 032 /** 033 * Static factory for the "best" JSON parser available on the classpath. Tries 034 * Jackson, then Gson, Snake YAML, and then falls back to the {@link BasicJsonParser}. 035 * @return a {@link JsonParser} 036 */ 037 public static JsonParser getJsonParser() { 038 if (ClassUtils.isPresent("com.fasterxml.jackson.databind.ObjectMapper", null)) { 039 return new JacksonJsonParser(); 040 } 041 if (ClassUtils.isPresent("com.google.gson.Gson", null)) { 042 return new GsonJsonParser(); 043 } 044 if (ClassUtils.isPresent("org.yaml.snakeyaml.Yaml", null)) { 045 return new YamlJsonParser(); 046 } 047 return new BasicJsonParser(); 048 } 049 050}