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.FilterConfig;
022    
023    import org.apache.commons.collections.iterators.EnumerationIterator;
024    
025    /**
026     * A configuration wrapper around a {@link FilterConfig}. This configuration is
027     * read only, adding or removing a property will throw an
028     * UnsupportedOperationException.
029     *
030     * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a>
031     * @version $Revision: 515306 $, $Date: 2007-03-06 22:15:00 +0100 (Di, 06. Mrz 2007) $
032     * @since 1.1
033     */
034    public class ServletFilterConfiguration extends BaseWebConfiguration
035    {
036        /** Stores the wrapped filter config.*/
037        protected FilterConfig config;
038    
039        /**
040         * Create a ServletFilterConfiguration using the filter initialization parameters.
041         *
042         * @param config the filter configuration
043         */
044        public ServletFilterConfiguration(FilterConfig config)
045        {
046            this.config = config;
047        }
048    
049        public Object getProperty(String key)
050        {
051            return handleDelimiters(config.getInitParameter(key));
052        }
053    
054        public Iterator getKeys()
055        {
056            return new EnumerationIterator(config.getInitParameterNames());
057        }
058    }