    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    }