org.inaetics.pubsub.impl.serialization.jackson.JacksonSerializer.java Source code

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Here is the source code for org.inaetics.pubsub.impl.serialization.jackson.JacksonSerializer.java

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/*******************************************************************************
 * 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 org.inaetics.pubsub.impl.serialization.jackson;

import java.io.IOException;
import java.util.Iterator;

import org.inaetics.pubsub.api.serialization.MultipartContainer;
import org.inaetics.pubsub.api.serialization.Serializer;
import org.osgi.service.log.LogService;

import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JacksonSerializer implements Serializer {

    private ObjectMapper mapper = new ObjectMapper();
    private volatile LogService logService;
    public static final String SERIALIZER_JACKSON = "serializer.jackson";

    @Override
    public byte[] serialize(MultipartContainer obj) {
        try {
            return mapper.writeValueAsBytes(obj);

        } catch (JsonProcessingException e) {
            logService.log(LogService.LOG_ERROR, "Exception during JSON serialize", e);
        }

        return null;
    }

    @Override
    public MultipartContainer deserialize(byte[] bytes) {
        ClassLoader loader = Thread.currentThread().getContextClassLoader();
        try {
            String json = new String(bytes);

            Thread.currentThread().setContextClassLoader(getClass().getClassLoader());

            MultipartContainer container = new MultipartContainer();
            JsonNode jsonNode = mapper.readTree(json);
            Iterator<JsonNode> classes = jsonNode.get("classes").elements();
            Iterator<JsonNode> objects = jsonNode.get("objects").elements();

            while (objects.hasNext() && classes.hasNext()) {
                JsonNode object = (JsonNode) objects.next();
                JsonNode clazz = (JsonNode) classes.next();

                final Class<?> cls = Class.forName(clazz.asText());
                Object obj = mapper.convertValue(object, cls);
                container.addObject(obj);
            }

            return container;
        } catch (IOException e) {
            logService.log(LogService.LOG_ERROR, "Exception during JSON deserialize", e);
        } catch (ClassNotFoundException e) {
            logService.log(LogService.LOG_ERROR, "Exception during JSON deserialize", e);
        } finally {
            Thread.currentThread().setContextClassLoader(loader);
        }
        return null;
    }
}