01: /*
02: * $HeadURL: https://svn.apache.org/repos/asf/httpcomponents/httpcore/tags/4.0-beta1/module-main/src/main/java/org/apache/http/protocol/BasicHttpContext.java $
03: * $Revision: 558111 $
04: * $Date: 2007-07-20 22:01:50 +0200 (Fri, 20 Jul 2007) $
05: *
06: * ====================================================================
07: * Licensed to the Apache Software Foundation (ASF) under one
08: * or more contributor license agreements. See the NOTICE file
09: * 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: 558111 $
43: *
44: * @since 4.0
45: */
46: public class BasicHttpContext implements HttpContext {
47:
48: private final HttpContext parentContext;
49: private Map map = null;
50:
51: public BasicHttpContext(final HttpContext parentContext) {
52: super ();
53: this .parentContext = parentContext;
54: }
55:
56: public Object getAttribute(final String id) {
57: if (id == null) {
58: throw new IllegalArgumentException("Id may not be null");
59: }
60: Object obj = null;
61: if (this .map != null) {
62: obj = this .map.get(id);
63: }
64: if (obj == null && this .parentContext != null) {
65: obj = this .parentContext.getAttribute(id);
66: }
67: return obj;
68: }
69:
70: public void setAttribute(final String id, final Object obj) {
71: if (id == null) {
72: throw new IllegalArgumentException("Id may not be null");
73: }
74: if (this .map == null) {
75: this .map = new HashMap();
76: }
77: this .map.put(id, obj);
78: }
79:
80: public Object removeAttribute(final String id) {
81: if (id == null) {
82: throw new IllegalArgumentException("Id may not be null");
83: }
84: if (this.map != null) {
85: return this.map.remove(id);
86: } else {
87: return null;
88: }
89: }
90:
91: }
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