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.Collections; 021 import java.util.Enumeration; 022 import java.util.Iterator; 023 024 import javax.servlet.FilterConfig; 025 026 /** 027 * A configuration wrapper around a {@link FilterConfig}. This configuration is 028 * 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 $Id: ServletFilterConfiguration.java 1211130 2011-12-06 20:57:19Z oheger $ 033 * @since 1.1 034 */ 035 public class ServletFilterConfiguration extends BaseWebConfiguration 036 { 037 /** Stores the wrapped filter config.*/ 038 protected FilterConfig config; 039 040 /** 041 * Create a ServletFilterConfiguration using the filter initialization parameters. 042 * 043 * @param config the filter configuration 044 */ 045 public ServletFilterConfiguration(FilterConfig config) 046 { 047 this.config = config; 048 } 049 050 public Object getProperty(String key) 051 { 052 return handleDelimiters(config.getInitParameter(key)); 053 } 054 055 public Iterator<String> getKeys() 056 { 057 // According to the documentation of getInitParameterNames() the 058 // enumeration is of type String. 059 @SuppressWarnings("unchecked") 060 Enumeration<String> en = config.getInitParameterNames(); 061 return Collections.list(en).iterator(); 062 } 063 }