1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package org.apache.commons.configuration2.web; 19 20 import java.util.Collections; 21 import java.util.Enumeration; 22 import java.util.Iterator; 23 24 import javax.servlet.FilterConfig; 25 26 /** 27 * A configuration wrapper around a {@link FilterConfig}. This configuration is read only, adding or removing a property 28 * will throw an UnsupportedOperationException. 29 * 30 * @since 1.1 31 */ 32 public class ServletFilterConfiguration extends BaseWebConfiguration { 33 /** Stores the wrapped filter config. */ 34 protected FilterConfig config; 35 36 /** 37 * Create a ServletFilterConfiguration using the filter initialization parameters. 38 * 39 * @param config the filter configuration 40 */ 41 public ServletFilterConfiguration(final FilterConfig config) { 42 this.config = config; 43 } 44 45 @Override 46 protected Object getPropertyInternal(final String key) { 47 return handleDelimiters(config.getInitParameter(key)); 48 } 49 50 @Override 51 protected Iterator<String> getKeysInternal() { 52 // According to the documentation of getInitParameterNames() the 53 // enumeration is of type String. 54 final Enumeration<String> en = config.getInitParameterNames(); 55 return Collections.list(en).iterator(); 56 } 57 }