package org.apache.ojb.broker.accesslayer;

 /* Copyright 2002-2005 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.util.factory.ConfigurableFactory;

 /**

  * Factory for {@link org.apache.ojb.broker.accesslayer.ConnectionFactory} implementations.

  * <br/>

  * See also {@link org.apache.ojb.broker.accesslayer.ConnectionManagerFactory}

  *

  * @version $Id: ConnectionFactoryFactory.java,v 1.1 2007-08-24 22:17:30 ewestfal Exp $

  */

 public class ConnectionFactoryFactory extends ConfigurableFactory

 {

     private static ConnectionFactoryFactory singleton = new ConnectionFactoryFactory();

     private ConnectionFactory conFactory;

     public synchronized static ConnectionFactoryFactory getInstance()

     {

         return singleton;

     }

     /**

      * Returns the used {@link ConnectionFactory} implementation. Currently each call

      * returns the same implementation instance.

      */

     public synchronized ConnectionFactory createConnectionFactory()

     {

         if (conFactory == null)

         {

             conFactory = (ConnectionFactory) createNewInstance();

         }

         return conFactory;

     }

     protected String getConfigurationKey()

     {

         return "ConnectionFactoryClass";

     }

 }