1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/BasicHttpContext.java $ 3 * $Revision: 654882 $ 4 * $Date: 2008-05-09 09:58:59 -0700 (Fri, 09 May 2008) $ 5 * 6 * ==================================================================== 7 * Licensed to the Apache Software Foundation (ASF) under one 8 * or more contributor license agreements. See the NOTICE file 9 * distributed with this work for additional information 10 * regarding copyright ownership. The ASF licenses this file 11 * to you under the Apache License, Version 2.0 (the 12 * "License"); you may not use this file except in compliance 13 * with the License. You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, 18 * software distributed under the License is distributed on an 19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20 * KIND, either express or implied. See the License for the 21 * specific language governing permissions and limitations 22 * under the License. 23 * ==================================================================== 24 * 25 * This software consists of voluntary contributions made by many 26 * individuals on behalf of the Apache Software Foundation. For more 27 * information on the Apache Software Foundation, please see 28 * <http://www.apache.org/>. 29 * 30 */ 31 32 package org.apache.http.protocol; 33 34 import java.util.HashMap; 35 import java.util.Map; 36 37 /** 38 * Default implementation of the {@link HttpContext HttpContext}. 39 * 40 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 41 * 42 * @version $Revision: 654882 $ 43 * 44 * @since 4.0 45 */ 46 public class BasicHttpContext implements HttpContext { 47 48 private final HttpContext parentContext; 49 private Map map = null; 50 BasicHttpContext()51 public BasicHttpContext() { 52 this(null); 53 } 54 BasicHttpContext(final HttpContext parentContext)55 public BasicHttpContext(final HttpContext parentContext) { 56 super(); 57 this.parentContext = parentContext; 58 } 59 getAttribute(final String id)60 public Object getAttribute(final String id) { 61 if (id == null) { 62 throw new IllegalArgumentException("Id may not be null"); 63 } 64 Object obj = null; 65 if (this.map != null) { 66 obj = this.map.get(id); 67 } 68 if (obj == null && this.parentContext != null) { 69 obj = this.parentContext.getAttribute(id); 70 } 71 return obj; 72 } 73 setAttribute(final String id, final Object obj)74 public void setAttribute(final String id, final Object obj) { 75 if (id == null) { 76 throw new IllegalArgumentException("Id may not be null"); 77 } 78 if (this.map == null) { 79 this.map = new HashMap(); 80 } 81 this.map.put(id, obj); 82 } 83 removeAttribute(final String id)84 public Object removeAttribute(final String id) { 85 if (id == null) { 86 throw new IllegalArgumentException("Id may not be null"); 87 } 88 if (this.map != null) { 89 return this.map.remove(id); 90 } else { 91 return null; 92 } 93 } 94 95 } 96