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 is read only, adding or removing a 029 * property will throw an UnsupportedOperationException. 030 * 031 * @since 1.1 032 */ 033public class ServletConfiguration extends BaseWebConfiguration { 034 035 /** Stores a reference to the wrapped {@code ServletConfig}. */ 036 protected ServletConfig config; 037 038 /** 039 * Creates a ServletConfiguration using the initialization parameter of the specified servlet. 040 * 041 * @param servlet the servlet 042 */ 043 public ServletConfiguration(final Servlet servlet) { 044 this(servlet.getServletConfig()); 045 } 046 047 /** 048 * Creates a ServletConfiguration using the servlet initialization parameters. 049 * 050 * @param config the servlet configuration 051 */ 052 public ServletConfiguration(final ServletConfig config) { 053 this.config = config; 054 } 055 056 @Override 057 protected Object getPropertyInternal(final String key) { 058 return handleDelimiters(config.getInitParameter(key)); 059 } 060 061 @Override 062 protected Iterator<String> getKeysInternal() { 063 // According to the documentation of getInitParameterNames() the 064 // enumeration is of type String. 065 final Enumeration<String> en = config.getInitParameterNames(); 066 return Collections.list(en).iterator(); 067 } 068}