1 /*
2  * Copyright (c) 1998, 2006, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 package sun.security.action;
27 
28 /**
29  * A convenience class for retrieving the boolean value of a system property
30  * as a privileged action.
31  *
32  * <p>An instance of this class can be used as the argument of
33  * <code>AccessController.doPrivileged</code>.
34  *
35  * <p>The following code retrieves the boolean value of the system
36  * property named <code>"prop"</code> as a privileged action: <p>
37  *
38  * <pre>
39  * boolean b = java.security.AccessController.doPrivileged
40  *              (new GetBooleanAction("prop")).booleanValue();
41  * </pre>
42  *
43  * @author Roland Schemers
44  * @see java.security.PrivilegedAction
45  * @see java.security.AccessController
46  * @since 1.2
47  */
48 
49 public class GetBooleanAction
50         implements java.security.PrivilegedAction<Boolean> {
51     private String theProp;
52 
53     /**
54      * Constructor that takes the name of the system property whose boolean
55      * value needs to be determined.
56      *
57      * @param theProp the name of the system property.
58      */
GetBooleanAction(String theProp)59     public GetBooleanAction(String theProp) {
60         this.theProp = theProp;
61     }
62 
63     /**
64      * Determines the boolean value of the system property whose name was
65      * specified in the constructor.
66      *
67      * @return the <code>Boolean</code> value of the system property.
68      */
run()69     public Boolean run() {
70         return Boolean.getBoolean(theProp);
71     }
72 }
73