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 018package org.apache.commons.configuration.web; 019 020import java.util.Collections; 021import java.util.Enumeration; 022import java.util.Iterator; 023 024import javax.servlet.Servlet; 025import javax.servlet.ServletConfig; 026 027/** 028 * A configuration wrapper around a {@link ServletConfig}. This configuration 029 * is read only, adding or removing a property will throw an 030 * UnsupportedOperationException. 031 * 032 * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a> 033 * @version $Id: ServletConfiguration.java 1211128 2011-12-06 20:56:41Z oheger $ 034 * @since 1.1 035 */ 036public class ServletConfiguration extends BaseWebConfiguration 037{ 038 /** Stores a reference to the wrapped {@code ServletConfig}.*/ 039 protected ServletConfig config; 040 041 /** 042 * Create a ServletConfiguration using the initialization parameter of 043 * the specified servlet. 044 * 045 * @param servlet the servlet 046 */ 047 public ServletConfiguration(Servlet servlet) 048 { 049 this(servlet.getServletConfig()); 050 } 051 052 /** 053 * Create a ServletConfiguration using the servlet initialization parameters. 054 * 055 * @param config the servlet configuration 056 */ 057 public ServletConfiguration(ServletConfig config) 058 { 059 this.config = config; 060 } 061 062 public Object getProperty(String key) 063 { 064 return handleDelimiters(config.getInitParameter(key)); 065 } 066 067 public Iterator<String> getKeys() 068 { 069 // According to the documentation of getInitParameterNames() the 070 // enumeration is of type String. 071 @SuppressWarnings("unchecked") 072 Enumeration<String> en = config.getInitParameterNames(); 073 return Collections.list(en).iterator(); 074 } 075}