textmessagehandler.java

OpenJMS是一个开源的Java Message Service API 1.0.2 规范的实现,它包含有以下特性： *. 它既支持点到点（point-to-point）（PTP）模型和发布/订

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 *
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 *    copy of this document.
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 *    above copyright notice, this list of conditions and the
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 *    materials provided with the distribution.
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 *    products derived from this Software without prior written
 *    permission of Exoffice Technologies.  For written permission,
 *    please contact [e-mail].
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 * 4. Products derived from this Software may not be called "Exolab"
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 * 5. Due credit should be given to the Exolab Project
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 *
 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
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 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 *
 * Copyright 2005 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: TextMessageHandler.java,v 1.1 2005/09/04 07:07:12 tanderson Exp $
 */
package org.exolab.jms.tools.migration.proxy;

import java.sql.Connection;
import javax.jms.JMSException;
import javax.jms.Message;

import org.exolab.jms.message.TextMessageImpl;
import org.exolab.jms.persistence.PersistenceException;


/**
 * Handler for messages of type <code>javax.jms.TextMessage</code>.
 *
 * @author <a href="mailto:[e-mail]">Tim Anderson</a>
 * @version $Revision: 1.1 $ $Date: 2005/09/04 07:07:12 $
 */
class TextMessageHandler extends AbstractMessageHandler {

    /**
     * Construct a new <code>TextMessageHandler</code>.
     *
     * @param destinations the destination store
     * @param connection   the database connection
     */
    public TextMessageHandler(DestinationStore destinations,
                              Connection connection) {
        super(destinations, connection);
    }

    /**
     * Returns the type of message that this handler supports.
     *
     * @return the type of message
     */
    protected String getType() {
        return "TextMessage";
    }

    /**
     * Create a new message.
     *
     * @return a new message
     * @throws JMSException for any JMS error
     */
    protected Message newMessage() throws JMSException {
        return new TextMessageImpl();
    }

    /**
     * Returns the body of the message.
     *
     * @param message the message
     * @return the body of the message
     * @throws JMSException for any JMS error
     */
    protected Object getBody(Message message) throws JMSException {
        return ((TextMessageImpl) message).getText();
    }

    /**
     * Populate the message body.
     *
     * @param body    the message body
     * @param message the message to populate
     * @throws JMSException         for any JMS error
     * @throws PersistenceException for any persistence error
     */
    protected void setBody(Object body, Message message)
            throws JMSException, PersistenceException {
        if (body != null && !(body instanceof String)) {
            throw new JMSException(
                    "Expected String body for TextMessage with JMSMessageID="
                    + message.getJMSMessageID()
                    + " but got type " + body.getClass().getName());
        }
        TextMessageImpl text = (TextMessageImpl) message;
        text.setText((String) body);
    }

}