package org.apache.ojb.broker.core.proxy;

 /* 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 java.util.HashMap;

 import net.sf.cglib.proxy.Callback;

 import net.sf.cglib.proxy.Enhancer;

 import net.sf.cglib.proxy.Factory;

 /**

  * @author andrew.clute

  *

  */

 public class ProxyFactoryCGLIBImpl extends AbstractProxyFactory {

     HashMap proxyFactories = new HashMap();

     public Class getDefaultIndirectionHandlerClass() {

         return IndirectionHandlerCGLIBImpl.class;

     }

     /**

      * Returns the class of the base class that the given IndirectionHandler must extend/implement

      * 

      */

     public Class getIndirectionHandlerBaseClass() {

         return IndirectionHandlerCGLIB.class;

     }

     public OJBProxy createProxy(Class proxyClass, IndirectionHandler handler) throws Exception {

         Factory factory = (Factory)proxyFactories.get(proxyClass);

         Object result = null;

         if (factory == null) {

             Class[] interfaces;

             if (proxyClass.isInterface()) {

                 interfaces = new Class[] { proxyClass, OJBProxy.class };

             } else {

                 interfaces = new Class[] { OJBProxy.class };

             }

             result = (Factory)Enhancer.create(proxyClass, interfaces, (Callback)handler);

             proxyFactories.put(proxyClass, result);

         } else {

             result = factory.newInstance((Callback)handler);

         }

         return (OJBProxy)result;

     }

     public boolean isNormalOjbProxy(Object proxyOrObject) {

         return super.isNormalOjbProxy(proxyOrObject) && (proxyOrObject instanceof Factory);

     }

     public IndirectionHandler getDynamicIndirectionHandler(Object obj) {

         return (IndirectionHandler)((Factory)obj).getCallbacks()[0];

     }

     public boolean interfaceRequiredForProxyGeneration() {

         return false;

     }

 }