    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    }