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.ArrayList; 021 import java.util.Collection; 022 import java.util.Iterator; 023 import java.util.List; 024 025 import javax.servlet.ServletRequest; 026 027 import org.apache.commons.collections.iterators.EnumerationIterator; 028 029 /** 030 * A configuration wrapper to read the parameters of a servlet request. This 031 * configuration is read only, adding or removing a property will throw an 032 * UnsupportedOperationException. 033 * 034 * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a> 035 * @version $Revision: 515306 $, $Date: 2007-03-06 22:15:00 +0100 (Di, 06 Mrz 2007) $ 036 * @since 1.1 037 */ 038 public class ServletRequestConfiguration extends BaseWebConfiguration 039 { 040 /** Stores the wrapped request.*/ 041 protected ServletRequest request; 042 043 /** 044 * Create a ServletRequestConfiguration using the request parameters. 045 * 046 * @param request the servlet request 047 */ 048 public ServletRequestConfiguration(ServletRequest request) 049 { 050 this.request = request; 051 } 052 053 public Object getProperty(String key) 054 { 055 String[] values = request.getParameterValues(key); 056 057 if (values == null || values.length == 0) 058 { 059 return null; 060 } 061 else if (values.length == 1) 062 { 063 return handleDelimiters(values[0]); 064 } 065 else 066 { 067 // ensure that escape characters in all list elements are removed 068 List result = new ArrayList(values.length); 069 for (int i = 0; i < values.length; i++) 070 { 071 Object val = handleDelimiters(values[i]); 072 if (val instanceof Collection) 073 { 074 result.addAll((Collection) val); 075 } 076 else 077 { 078 result.add(val); 079 } 080 } 081 return result; 082 } 083 } 084 085 public Iterator getKeys() 086 { 087 return new EnumerationIterator(request.getParameterNames()); 088 } 089 }