io.fns.calculator.config.LegacyJacksonConfig.java Source code

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Here is the source code for io.fns.calculator.config.LegacyJacksonConfig.java

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/**
 * Copyright 2014 fastnsilver.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.fns.calculator.config;

import java.util.Collection;

import javax.annotation.PostConstruct;

import org.codehaus.jackson.Version;
import org.codehaus.jackson.map.Module;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.module.SimpleModule;
import org.springframework.beans.factory.BeanFactoryUtils;
import org.springframework.beans.factory.ListableBeanFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJacksonHttpMessageConverter;

/**
 * Re-enables {@link HttpMessageConverter} for legacy Jackson (< 2.x)
 * implementation.
 * 
 * @author Chris Phillipson
 * 
 */
@Configuration
@ConditionalOnClass(ObjectMapper.class)
public class LegacyJacksonConfig {

    @Autowired
    private ListableBeanFactory beanFactory;

    @PostConstruct
    public void init() {
        Collection<ObjectMapper> mappers = BeanFactoryUtils
                .beansOfTypeIncludingAncestors(this.beanFactory, ObjectMapper.class).values();
        Collection<Module> modules = BeanFactoryUtils.beansOfTypeIncludingAncestors(this.beanFactory, Module.class)
                .values();
        for (ObjectMapper mapper : mappers) {
            mapper.registerModule(modules.iterator().next()); // there can be only one!
            break;
        }
    }

    @Bean
    @ConditionalOnMissingBean
    public Module jaxsonModule() {
        return new SimpleModule("legacyJacksonModule", Version.unknownVersion());
    }

    @Bean
    @ConditionalOnMissingBean
    public ObjectMapper jaxsonObjectMapper() {
        return new ObjectMapper();
    }

    @Bean
    @ConditionalOnMissingBean
    public MappingJacksonHttpMessageConverter mappingJacksonHttpMessageConverter(ObjectMapper objectMapper) {
        MappingJacksonHttpMessageConverter converter = new MappingJacksonHttpMessageConverter();
        converter.setObjectMapper(objectMapper);
        return converter;
    }
}