001    /*
002     * Copyright 2002-2004 The Apache Software Foundation
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *     http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.apache.commons.clazz.bean;
017    
018    import org.apache.commons.clazz.ClazzLoader;
019    import org.apache.commons.clazz.ModelClazzLoader;
020    import org.apache.commons.clazz.common.GroupClazzLoader;
021    
022    /**
023     * 
024     * @author <a href="mailto:dmitri@apache.org">Dmitri Plotnikov</a>
025     * @version $Id: BeanGroupClazzLoader.java 155436 2005-02-26 13:17:48Z dirkv $
026     */
027    public class BeanGroupClazzLoader extends GroupClazzLoader {
028    
029        public BeanGroupClazzLoader(ModelClazzLoader modelClazzLoader) {
030            super(modelClazzLoader);
031        }
032        
033        public boolean canAddClazzLoader(ClazzLoader loader) {
034            return loader instanceof BeanClazzLoader;
035        }        
036    
037        public boolean isMember(Object instance) {
038            // This is just an optimization - the Group can answer for all
039            // of its members without checking with each one individually
040            return instance instanceof Bean;
041        }
042    
043        /**
044         * @see GroupClazzLoader#getClazzName(Object)
045         */
046        public String getClazzName(Object instance) {
047            // This is just an optimization - the Group can answer for all 
048            // of its members without checking with each one individually 
049            if (!isMember(instance)) {
050                return null;
051            }
052            return super.getClazzName(instance);
053        }
054    }