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.ServletContext;
023    
024    import org.apache.commons.collections.iterators.EnumerationIterator;
025    
026    /**
027     * A configuration wrapper to read the initialization parameters of a servlet
028     * context. This configuration is read only, adding or removing a property will
029     * throw an 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 ServletContextConfiguration extends BaseWebConfiguration
036    {
037        /** Stores the wrapped servlet context.*/
038        protected ServletContext context;
039    
040        /**
041         * Create a ServletContextConfiguration using the context of
042         * the specified servlet.
043         *
044         * @param servlet the servlet
045         */
046        public ServletContextConfiguration(Servlet servlet)
047        {
048            this.context = servlet.getServletConfig().getServletContext();
049        }
050    
051        /**
052         * Create a ServletContextConfiguration using the servlet context
053         * initialization parameters.
054         *
055         * @param context the servlet context
056         */
057        public ServletContextConfiguration(ServletContext context)
058        {
059            this.context = context;
060        }
061    
062        public Object getProperty(String key)
063        {
064            return handleDelimiters(context.getInitParameter(key));
065        }
066    
067        public Iterator getKeys()
068        {
069            return new EnumerationIterator(context.getInitParameterNames());
070        }
071    }