fr.xebia.springframework.jms.support.converter.JaxbMessageConverterTibjmsImpl.java Source code

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Here is the source code for fr.xebia.springframework.jms.support.converter.JaxbMessageConverterTibjmsImpl.java

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/*
 * Copyright 2002-2008 Xebia and the original author or authors.
 *
 * 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 fr.xebia.springframework.jms.support.converter;

import java.lang.reflect.Method;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.xml.bind.Marshaller;

import org.springframework.core.NestedExceptionUtils;
import org.springframework.jms.support.converter.MessageConversionException;

/**
 * <p>
 * Tibco Enterprise Messaging Service (EMS) implementation of the <code>JaxbMessageConverter</code>. Keeps generated XML encoding in sync
 * with {@link com.tibco.tibjms.TibjmsMessage#_encoding} field.
 * </p>
 * <p>
 * We use reflection to load {@link com.tibco.tibjms.Tibjms#setMessageEncoding(Message, String)} method to be able to compile without Tibco
 * EMS jar.
 * </p>
 * 
 * @see com.tibco.tibjms.Tibjms#setMessageEncoding(Message, String)
 * @author <a href="mailto:cyrille.leclerc@pobox.com">Cyrille Le Clerc</a>
 */
public class JaxbMessageConverterTibjmsImpl extends JaxbMessageConverter {

    private static final String TIBJMS_CLASS = "com.tibco.tibjms.Tibjms";

    private static final String TIBJMS_SET_MESSAGE_ENCODING_METHOD = "setMessageEncoding";

    protected Method setMessageEncodingMethod;

    /**
     * @throws MessageConversionException
     *             if a problem occurs loading {@link com.tibco.tibjms.Tibjms#setMessageEncodingMethod} method.
     */
    public JaxbMessageConverterTibjmsImpl() {
        super();
        try {
            Class<?> tibJmsClass = Class.forName(TIBJMS_CLASS);

            this.setMessageEncodingMethod = tibJmsClass.getMethod(TIBJMS_SET_MESSAGE_ENCODING_METHOD,
                    new Class[] { Message.class, String.class });
        } catch (Exception e) {
            throw new MessageConversionException(
                    NestedExceptionUtils.buildMessage("Exception loading Tibjms class", e), e);
        }
    }

    /**
     * Set given <code>message</code> encoding with Tibco proprietary APIs.
     * 
     * @see com.tibco.tibjms.Tibjms#setMessageEncoding(javax.jms.Message, String)
     * @see fr.xebia.springframework.jms.support.converter.JaxbMessageConverter#postProcessResponseMessage(Message)
     */
    @Override
    protected void postProcessResponseMessage(Message textMessage) throws JMSException {
        super.postProcessResponseMessage(textMessage);
        String encoding = this.marshallerProperties == null ? null
                : (String) this.marshallerProperties.get(Marshaller.JAXB_ENCODING);

        encoding = encoding == null ? "UTF-8" : encoding;
        try {
            this.setMessageEncodingMethod.invoke(null, new Object[] { textMessage, encoding });
        } catch (Exception e) {
            MessageConversionException jmse = new MessageConversionException(
                    NestedExceptionUtils.buildMessage("Exception setting message encoding", e), e);
            throw jmse;
        }
    }
}