001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *      http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.oozie.client.event.jms;
019
020import org.codehaus.jackson.map.DeserializationConfig;
021import org.codehaus.jackson.map.ObjectMapper;
022
023
024/**
025 * Message deserializer to convert from JSON to java object
026 */
027public class JSONMessageDeserializer extends MessageDeserializer {
028
029    static ObjectMapper mapper = new ObjectMapper(); // Thread-safe.
030
031    static {
032        mapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
033    }
034
035    @Override
036    public <T> T getDeserializedObject(String messageBody, Class<T> clazz) {
037        try {
038            return mapper.readValue(messageBody, clazz);
039        }
040        catch (Exception exception) {
041            throw new IllegalArgumentException("Could not deserialize the JMS message using "
042                    + clazz.getCanonicalName(), exception);
043        }
044    }
045}