net.ljcomputing.gson.config.GsonWebMvcConfigurerAdapter.java Source code

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Here is the source code for net.ljcomputing.gson.config.GsonWebMvcConfigurerAdapter.java

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/**
       Copyright 2015, James G. Willmore
    
   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 net.ljcomputing.gson.config;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.GsonHttpMessageConverter;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

import net.ljcomputing.gson.strategy.ExcludeFromJsonAnnotationExclusionStrategy;

/**
 * GSON Web MVC configurer adapter - overrides message converters.
 * 
 * @author James G. Willmore
 *
 */
@Configuration
@EnableWebMvc
public class GsonWebMvcConfigurerAdapter extends WebMvcConfigurerAdapter {

    /** The logger. */
    private static final Logger LOGGER = LoggerFactory.getLogger(GsonWebMvcConfigurerAdapter.class);

    /**
     * Instantiates a new gson web mvc configurer adapter.
     */
    public GsonWebMvcConfigurerAdapter() {
        super();
        LOGGER.info("Initializing {}", this.getClass());
    }

    /**
     * @see org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter
     * #configureMessageConverters(java.util.List)
     */
    @Override
    public final void configureMessageConverters(final List<HttpMessageConverter<?>> converters) {
        final Gson gson = new GsonBuilder().setExclusionStrategies(new ExcludeFromJsonAnnotationExclusionStrategy())
                .serializeNulls().create();

        final GsonHttpMessageConverter messageConverter = new GsonHttpMessageConverter();

        messageConverter.setGson(gson);

        converters.add(messageConverter);
    }
}