/*

  * Copyright 2002-2004 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.

  */

 package org.apache.commons.clazz.bean;

 import java.lang.reflect.Constructor;

 import org.apache.commons.clazz.Clazz;

 import org.apache.commons.clazz.ClazzLoader;

 import org.apache.commons.clazz.ModelClazzLoader;

 /**

  * 

  * @author <a href="mailto:dmitri@apache.org">Dmitri Plotnikov</a>

  * @version $Id: BeanClazzLoader.java 155436 2005-02-26 13:17:48Z dirkv $

  */

 public class BeanClazzLoader extends ClazzLoader {

     public BeanClazzLoader(ModelClazzLoader modelClazzLoader) {

         super(modelClazzLoader);

     }

     /**

      * @see ClazzLoader#isMember(Object)

      */

     public boolean isMember(Object instance) {

         return instance instanceof Bean;

     }

     public String getClazzName(Object instance) {

         if (!isMember(instance)) {

             return null;

         }

         return ((Bean) instance).getClazz().getName();

     }

     /**

      * BeanClazzLoader does not cache clazzes, its parent, BeanGroupClazzLoader,

      * is responsible for caching

      */

     public Clazz getClazzForName(String clazzName) {

         return null;

     }

     /**

      * @see ClazzLoader#defineClazz(String, Class, Class)

      */

     public Clazz defineClazz(String name, Class clazzType, Class instanceClass) 

     {

         if (!BeanClazz.class.isAssignableFrom(clazzType)) {

             return null;

         }

         try {

             Constructor constructor =

                 clazzType.getConstructor(

                     new Class[] {

                         ClazzLoader.class,

                         String.class,

                         Class.class });

             return (Clazz) constructor.newInstance(

                 new Object[] { getModelClazzLoader(), name, instanceClass });

         }

         catch (Exception e) {

             e.printStackTrace();

             throw new BeanClazzConfigurationException(

                 "Cannot define clazz "

                     + name

                     + " of clazz type "

                     + clazzType.getName(),

                 e);

         }

     }

 }