HydraMessageConverter.java

/*
 * Copyright (c) 2014. Escalon System-Entwicklung, Dietrich Schulten
 *
 * 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 de.escalon.hypermedia.spring.hydra;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;
import de.escalon.hypermedia.hydra.serialize.ProxyUnwrapper;
import de.escalon.hypermedia.spring.HypermediaTypes;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;

import java.util.Arrays;

/**
 * Created by dschulten on 04.10.2014.
 */
public class HydraMessageConverter extends MappingJackson2HttpMessageConverter {


    public HydraMessageConverter() {
        this(null);
    }

    /**
     * Creates new HydraMessageConverter with proxyUnwrapper.
     *
     * @param proxyUnwrapper
     *         capable of unwrapping proxified Java beans during message conversion.
     */
    public HydraMessageConverter(ProxyUnwrapper proxyUnwrapper, Module... additionalModules) {
        ObjectMapper objectMapper = new ObjectMapper();
        // see https://github.com/json-ld/json-ld.org/issues/76
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        objectMapper.registerModules(additionalModules);
        objectMapper.registerModule(new JacksonHydraModule(proxyUnwrapper));
        this.setObjectMapper(objectMapper);
        this.setSupportedMediaTypes(
                Arrays.asList(HypermediaTypes.APPLICATION_JSONLD));
    }
}