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.common;
017    
018    import org.apache.commons.clazz.Clazz;
019    import org.apache.commons.clazz.ClazzFeature;
020    
021    /**
022     * Maintains common behavior of various implementations of ClazzFeature.
023     *  
024     * @author <a href="mailto:dmitri@apache.org">Dmitri Plotnikov</a>
025     * @version $Id: ClazzFeatureSupport.java 155436 2005-02-26 13:17:48Z dirkv $
026     */
027    public abstract class ClazzFeatureSupport
028            extends ClazzElementSupport 
029            implements ClazzFeature 
030    {
031    
032        private Clazz declaringClazz;
033    
034        /**
035         * Constructor for ClazzFeature.
036         */
037        public ClazzFeatureSupport(Clazz declaringClazz) {
038            if (declaringClazz == null) {
039                throw new NullPointerException("Declaring Clazz cannot be null");
040            }
041            this.declaringClazz = declaringClazz;
042        }
043    
044        /**
045         * @see org.apache.commons.clazz.ClazzFeature#getDeclaringClazz()
046         */
047        public Clazz getDeclaringClazz() {
048            return declaringClazz;
049        }
050    
051    }