001/*
002 * Copyright 2002-2017 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 *      https://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.http.converter.support;
018
019import javax.xml.transform.Source;
020
021import org.springframework.http.converter.FormHttpMessageConverter;
022import org.springframework.http.converter.json.GsonHttpMessageConverter;
023import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
024import org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter;
025import org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter;
026import org.springframework.http.converter.xml.SourceHttpMessageConverter;
027import org.springframework.util.ClassUtils;
028
029/**
030 * Extension of {@link org.springframework.http.converter.FormHttpMessageConverter},
031 * adding support for XML and JSON-based parts.
032 *
033 * @author Rossen Stoyanchev
034 * @author Juergen Hoeller
035 * @since 3.2
036 */
037public class AllEncompassingFormHttpMessageConverter extends FormHttpMessageConverter {
038
039        private static final boolean jaxb2Present =
040                        ClassUtils.isPresent("javax.xml.bind.Binder",
041                                        AllEncompassingFormHttpMessageConverter.class.getClassLoader());
042
043        private static final boolean jackson2Present =
044                        ClassUtils.isPresent("com.fasterxml.jackson.databind.ObjectMapper",
045                                        AllEncompassingFormHttpMessageConverter.class.getClassLoader()) &&
046                        ClassUtils.isPresent("com.fasterxml.jackson.core.JsonGenerator",
047                                        AllEncompassingFormHttpMessageConverter.class.getClassLoader());
048
049        private static final boolean jackson2XmlPresent =
050                        ClassUtils.isPresent("com.fasterxml.jackson.dataformat.xml.XmlMapper",
051                                        AllEncompassingFormHttpMessageConverter.class.getClassLoader());
052
053        private static final boolean gsonPresent =
054                        ClassUtils.isPresent("com.google.gson.Gson",
055                                        AllEncompassingFormHttpMessageConverter.class.getClassLoader());
056
057
058        public AllEncompassingFormHttpMessageConverter() {
059                addPartConverter(new SourceHttpMessageConverter<Source>());
060
061                if (jaxb2Present && !jackson2XmlPresent) {
062                        addPartConverter(new Jaxb2RootElementHttpMessageConverter());
063                }
064
065                if (jackson2Present) {
066                        addPartConverter(new MappingJackson2HttpMessageConverter());
067                }
068                else if (gsonPresent) {
069                        addPartConverter(new GsonHttpMessageConverter());
070                }
071
072                if (jackson2XmlPresent) {
073                        addPartConverter(new MappingJackson2XmlHttpMessageConverter());
074                }
075        }
076
077}