001/*
002 * Copyright 2012-2016 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.autoconfigure.web;
018
019import java.util.Collections;
020import java.util.List;
021
022import org.springframework.beans.factory.ObjectProvider;
023import org.springframework.boot.autoconfigure.AutoConfigureAfter;
024import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
025import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
026import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
027import org.springframework.boot.autoconfigure.gson.GsonAutoConfiguration;
028import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
029import org.springframework.boot.context.properties.EnableConfigurationProperties;
030import org.springframework.context.annotation.Bean;
031import org.springframework.context.annotation.Configuration;
032import org.springframework.context.annotation.Import;
033import org.springframework.http.converter.HttpMessageConverter;
034import org.springframework.http.converter.StringHttpMessageConverter;
035
036/**
037 * {@link EnableAutoConfiguration Auto-configuration} for {@link HttpMessageConverter}s.
038 *
039 * @author Dave Syer
040 * @author Christian Dupuis
041 * @author Piotr Maj
042 * @author Oliver Gierke
043 * @author David Liu
044 * @author Andy Wilkinson
045 * @author Sebastien Deleuze
046 * @author Stephane Nicoll
047 */
048@Configuration
049@ConditionalOnClass(HttpMessageConverter.class)
050@AutoConfigureAfter({ GsonAutoConfiguration.class, JacksonAutoConfiguration.class })
051@Import({ JacksonHttpMessageConvertersConfiguration.class,
052                GsonHttpMessageConvertersConfiguration.class })
053public class HttpMessageConvertersAutoConfiguration {
054
055        static final String PREFERRED_MAPPER_PROPERTY = "spring.http.converters.preferred-json-mapper";
056
057        private final List<HttpMessageConverter<?>> converters;
058
059        public HttpMessageConvertersAutoConfiguration(
060                        ObjectProvider<List<HttpMessageConverter<?>>> convertersProvider) {
061                this.converters = convertersProvider.getIfAvailable();
062        }
063
064        @Bean
065        @ConditionalOnMissingBean
066        public HttpMessageConverters messageConverters() {
067                return new HttpMessageConverters(this.converters == null
068                                ? Collections.<HttpMessageConverter<?>>emptyList() : this.converters);
069        }
070
071        @Configuration
072        @ConditionalOnClass(StringHttpMessageConverter.class)
073        @EnableConfigurationProperties(HttpEncodingProperties.class)
074        protected static class StringHttpMessageConverterConfiguration {
075
076                private final HttpEncodingProperties encodingProperties;
077
078                protected StringHttpMessageConverterConfiguration(
079                                HttpEncodingProperties encodingProperties) {
080                        this.encodingProperties = encodingProperties;
081                }
082
083                @Bean
084                @ConditionalOnMissingBean
085                public StringHttpMessageConverter stringHttpMessageConverter() {
086                        StringHttpMessageConverter converter = new StringHttpMessageConverter(
087                                        this.encodingProperties.getCharset());
088                        converter.setWriteAcceptCharset(false);
089                        return converter;
090                }
091
092        }
093
094}