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