Distinguishing between topics and queues

          Hi,
          I have a generic piece of code that takes a javax.jms.Destination that does different
          things depending if the destination is a queue or a topic.
          The problem is that it seems that destinations in Weblogic implement both queue
          and topic:
          instanceof queue <new_JMSTopic_1>
          queue name: <new_JMSTopic_1>
          weblogic.jms.common.InvalidDestinationException: Destination must be a queue,
          ne
          w_JMSTopic_1
          at weblogic.jms.common.Destination.checkDestinationType(Destination.java
          :113)
          at weblogic.jms.client.JMSSession.createBrowser(JMSSession.java:1516)
          at weblogic.jms.client.JMSSession.createBrowser(JMSSession.java:1500)
          at Test.run(Test.java:100)
          at Test.main(Test.java:311)
          Is there anyway for me to programatically distinguish between queues and topics
          as there seems not to be any javadoc on weblogic.jms.common.Destination and instanceof
          does not work? I would prefer not to rely on exceptions.
          I'm using Weblogic 8.1 sp2.
          Thanks
          Riad

          Cool. Thanks for your help Tom.
          Riad
          Tom Barnes <[email protected]> wrote:
          >Hi Riad,
          >
          >This has come up before.
          >
          >For now, you may cast dest to weblogic.jms.common.DestinationImpl
          >and call "isQueue()". Normally, only the javadoc'd methods
          >in weblogic.jms.extensions are intended for public use,
          >but for this case we make an exception.
          >
          >In the next release, this method will be exposed through
          >a new public WL JMS API extension:
          >weblogic.jms.extensions.WLDestination,
          >and might not be available otherwise.
          >
          >Tom, BEA
          >
          >P.S. A java tip: The JDK's built-in "javap"
          >is useful for viewing an arbitrary class api.
          >As in "javap weblogic.jms.extensions.JMSHelper".
          >
          >Riad wrote:
          >> Hi,
          >>
          >> I have a generic piece of code that takes a javax.jms.Destination that
          >does different
          >> things depending if the destination is a queue or a topic.
          >>
          >> The problem is that it seems that destinations in Weblogic implement
          >both queue
          >> and topic:
          >> instanceof queue <new_JMSTopic_1>
          >> queue name: <new_JMSTopic_1>
          >> weblogic.jms.common.InvalidDestinationException: Destination must be
          >a queue,
          >> ne
          >> w_JMSTopic_1
          >> at weblogic.jms.common.Destination.checkDestinationType(Destination.java
          >> :113)
          >> at weblogic.jms.client.JMSSession.createBrowser(JMSSession.java:1516)
          >> at weblogic.jms.client.JMSSession.createBrowser(JMSSession.java:1500)
          >> at Test.run(Test.java:100)
          >> at Test.main(Test.java:311)
          >>
          >> Is there anyway for me to programatically distinguish between queues
          >and topics
          >> as there seems not to be any javadoc on weblogic.jms.common.Destination
          >and instanceof
          >> does not work? I would prefer not to rely on exceptions.
          >>
          >> I'm using Weblogic 8.1 sp2.
          >>
          >> Thanks
          >> Riad
          >

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