1 /* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
2 *
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 package org.springframework.security.context;
17
18 import org.springframework.util.Assert;
19
20
21 /**
22 * A <code>static</code> field-based implementation of {@link
23 * org.springframework.security.context.SecurityContextHolderStrategy}.<p>This means that all instances in the JVM share the
24 * same <code>SecurityContext</code>. This is generally useful with rich clients, such as Swing.</p>
25 *
26 * @author Ben Alex
27 * @version $Id: GlobalSecurityContextHolderStrategy.java 2217 2007-10-27 00:45:30Z luke_t $
28 */
29 public class GlobalSecurityContextHolderStrategy implements SecurityContextHolderStrategy {
30 //~ Static fields/initializers =====================================================================================
31
32 private static SecurityContext contextHolder;
33
34 //~ Methods ========================================================================================================
35
36 public void clearContext() {
37 contextHolder = null;
38 }
39
40 public SecurityContext getContext() {
41 if (contextHolder == null) {
42 contextHolder = new SecurityContextImpl();
43 }
44
45 return contextHolder;
46 }
47
48 public void setContext(SecurityContext context) {
49 Assert.notNull(context, "Only non-null SecurityContext instances are permitted");
50 contextHolder = context;
51 }
52 }