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.ServletContext; 026 027/** 028 * A configuration wrapper to read the initialization parameters of a servlet 029 * context. This configuration is read only, adding or removing a property will 030 * throw an UnsupportedOperationException. 031 * 032 * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a> 033 * @since 1.1 034 */ 035public class ServletContextConfiguration extends BaseWebConfiguration 036{ 037 /** Stores the wrapped servlet context.*/ 038 protected ServletContext context; 039 040 /** 041 * Create a ServletContextConfiguration using the context of 042 * the specified servlet. 043 * 044 * @param servlet the servlet 045 */ 046 public ServletContextConfiguration(final Servlet servlet) 047 { 048 this.context = servlet.getServletConfig().getServletContext(); 049 } 050 051 /** 052 * Create a ServletContextConfiguration using the servlet context 053 * initialization parameters. 054 * 055 * @param context the servlet context 056 */ 057 public ServletContextConfiguration(final ServletContext context) 058 { 059 this.context = context; 060 } 061 062 @Override 063 protected Object getPropertyInternal(final String key) 064 { 065 return handleDelimiters(context.getInitParameter(key)); 066 } 067 068 @Override 069 protected Iterator<String> getKeysInternal() 070 { 071 // According to the documentation of getInitParameterNames() the 072 // enumeration is of type String. 073 final Enumeration<String> en = context.getInitParameterNames(); 074 return Collections.list(en).iterator(); 075 } 076}