package org.apache.ojb.broker.core;

 /* Copyright 2003-2005 The Apache Software Foundation

  *

  * 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.

  */

 import org.apache.ojb.broker.PersistenceBrokerException;

 import org.apache.ojb.broker.PersistenceBrokerInternal;

 public class PersistenceBrokerHandle extends DelegatingPersistenceBroker

 {

     /**

      * Constructor for the handle, set itself in

      * {@link PersistenceBrokerThreadMapping#setCurrentPersistenceBroker}

      */

     public PersistenceBrokerHandle(final PersistenceBrokerInternal broker)

     {

         super(broker);

         PersistenceBrokerThreadMapping.setCurrentPersistenceBroker(broker.getPBKey(), this);

     }

     public boolean isClosed()

     {

         return super.isClosed();

     }

     public boolean isInTransaction() throws PersistenceBrokerException

     {

         return !isClosed() && super.isInTransaction();

     }

     /**

      * Destroy this handle and return the underlying (wrapped) PB instance

      * to pool (when using default implementation of PersistenceBrokerFactory),

      * unset this instance from {@link PersistenceBrokerThreadMapping}.

      */

     public boolean close()

     {

         if (getDelegate() == null) return true;

         try

         {

             PersistenceBrokerThreadMapping.unsetCurrentPersistenceBroker(getPBKey(), this);

             super.close();

         }

         finally

         {

             /*

             here we destroy the handle. set the

             underlying PB instance 'null', thus it's not

             possible to corrupt a closed PB instance.

             */

             setDelegate(null);

         }

         return true;

     }

 }