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/*
 * @(#)Topic.java	1.11 06/28/07
 */ 

package com.sun.messaging;

import com.sun.messaging.jmq.DestinationName;
import com.sun.messaging.naming.ReferenceGenerator;
import com.sun.messaging.naming.AdministeredObjectFactory;

/**
 * A Topic represents an identity of a repository of messages
 * used in the JMS Publish/Subscribe messaging domain.
 *
 * @see         javax.jms.Topic javax.jms.Topic
 */
public class Topic extends com.sun.messaging.BasicTopic implements javax.naming.Referenceable {

    /**
     * Constructs an identity of a Publish/Subscribe Topic with the default name
     */
    public Topic () {
        super();
    }

    /**
     * Constructs an identity of a Publish/Subscribe Topic with the given name
     *
     * @param   name The name of the Topic
     */
    public Topic (String name) throws javax.jms.JMSException {
        super(name);
    }

    /**
     * Returns a Reference Object that can be used to reconstruct this object.
     *
     * @return  The Reference Object that can be used to reconstruct this object
     *
     */
    public javax.naming.Reference getReference() {
        return (ReferenceGenerator.getReference(this, AdministeredObjectFactory.class.getName()));
    }

    /**  
     * Sets the name of this Topic. This method performs name validatation
     * This is used by an Application Server via the Sun MQ J2EE Resource Adapter 
     *   
     * @param   name The name of the Topic
     * @throws  IllegalArgumentException if name is invalid
     */  
    public void setName (String name) {
        if (DestinationName.isSyntaxValid(name)) {
            configuration.put(DestinationConfiguration.imqDestinationName, name); 
        } else { 
            throw new IllegalArgumentException("MQ:Topic:Invalid Topic Name - " + name);
        }
    }    
 
    /**  
     * Sets a description for this Topic. The description can be any String
     *   
     * @param   description The description for this Topic
     */  
    public void setDescription (String description) {
        configuration.put(DestinationConfiguration.imqDestinationDescription, description);
    }

    /**  
     * Returns the description for this Topic.
     *   
     * @return The description for this Topic
     */  
    public String
    getDescription()
    {
        try {
            return getProperty(DestinationConfiguration.imqDestinationDescription);
        } catch (javax.jms.JMSException jmse) {
            return "";
        }
    }

}




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