001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    package org.apache.commons.configuration.web;
019    
020    import java.util.Iterator;
021    import javax.servlet.Servlet;
022    import javax.servlet.ServletConfig;
023    
024    import org.apache.commons.collections.iterators.EnumerationIterator;
025    
026    /**
027     * A configuration wrapper around a {@link ServletConfig}. This configuration
028     * is read only, adding or removing a property will throw an
029     * UnsupportedOperationException.
030     *
031     * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a>
032     * @version $Revision: 515306 $, $Date: 2007-03-06 22:15:00 +0100 (Di, 06. Mrz 2007) $
033     * @since 1.1
034     */
035    public class ServletConfiguration extends BaseWebConfiguration
036    {
037        /** Stores a reference to the wrapped <code>ServletConfig</code>.*/
038        protected ServletConfig config;
039    
040        /**
041         * Create a ServletConfiguration using the initialization parameter of
042         * the specified servlet.
043         *
044         * @param servlet the servlet
045         */
046        public ServletConfiguration(Servlet servlet)
047        {
048            this(servlet.getServletConfig());
049        }
050    
051        /**
052         * Create a ServletConfiguration using the servlet initialization parameters.
053         *
054         * @param config the servlet configuration
055         */
056        public ServletConfiguration(ServletConfig config)
057        {
058            this.config = config;
059        }
060    
061        public Object getProperty(String key)
062        {
063            return handleDelimiters(config.getInitParameter(key));
064        }
065    
066        public Iterator getKeys()
067        {
068            return new EnumerationIterator(config.getInitParameterNames());
069        }
070    }