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.configuration2.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 * @since 1.1 033 */ 034public class ServletConfiguration extends BaseWebConfiguration 035{ 036 /** Stores a reference to the wrapped {@code ServletConfig}.*/ 037 protected ServletConfig config; 038 039 /** 040 * Create a ServletConfiguration using the initialization parameter of 041 * the specified servlet. 042 * 043 * @param servlet the servlet 044 */ 045 public ServletConfiguration(final Servlet servlet) 046 { 047 this(servlet.getServletConfig()); 048 } 049 050 /** 051 * Create a ServletConfiguration using the servlet initialization parameters. 052 * 053 * @param config the servlet configuration 054 */ 055 public ServletConfiguration(final ServletConfig config) 056 { 057 this.config = config; 058 } 059 060 @Override 061 protected Object getPropertyInternal(final String key) 062 { 063 return handleDelimiters(config.getInitParameter(key)); 064 } 065 066 @Override 067 protected Iterator<String> getKeysInternal() 068 { 069 // According to the documentation of getInitParameterNames() the 070 // enumeration is of type String. 071 final Enumeration<String> en = config.getInitParameterNames(); 072 return Collections.list(en).iterator(); 073 } 074}