JSONMessageDeserializer.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.oozie.client.event.jms;

import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;


/**
 * Message deserializer to convert from JSON to java object
 */
public class JSONMessageDeserializer extends MessageDeserializer {

    static ObjectMapper mapper = new ObjectMapper(); // Thread-safe.

    static {
        mapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    }

    @Override
    public <T> T getDeserializedObject(String messageBody, Class<T> clazz) {
        try {
            return mapper.readValue(messageBody, clazz);
        }
        catch (Exception exception) {
            throw new IllegalArgumentException("Could not deserialize the JMS message using "
                    + clazz.getCanonicalName(), exception);
        }
    }
}