1 /*

     2  * Copyright (c) 2009, 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 import java.security.Security;

    29 

    30 /**

    31  * A convenience class for retrieving the boolean value of a security property

    32  * as a privileged action.

    33  *

    34  * <p>An instance of this class can be used as the argument of

    35  * <code>AccessController.doPrivileged</code>.

    36  *

    37  * <p>The following code retrieves the boolean value of the security

    38  * property named <code>"prop"</code> as a privileged action:

    39  *

    40  * <pre>

    41  * boolean b = java.security.AccessController.doPrivileged

    42  *              (new GetBooleanSecurityPropertyAction("prop")).booleanValue();

    43  * </pre>

    44  *

    45  */

    46 public class GetBooleanSecurityPropertyAction

    47         implements java.security.PrivilegedAction<Boolean> {

    48     private String theProp;

    49 

    50     /**

    51      * Constructor that takes the name of the security property whose boolean

    52      * value needs to be determined.

    53      *

    54      * @param theProp the name of the security property

    55      */

    56     public GetBooleanSecurityPropertyAction(String theProp) {

    57         this.theProp = theProp;

    58     }

    59 

    60     /**

    61      * Determines the boolean value of the security property whose name was

    62      * specified in the constructor.

    63      *

    64      * @return the <code>Boolean</code> value of the security property.

    65      */

    66     public Boolean run() {

    67         boolean b = false;

    68         try {

    69             String value = Security.getProperty(theProp);

    70             b = (value != null) && value.equalsIgnoreCase("true");

    71         } catch (NullPointerException e) {}

    72         return b;

    73     }

    74 }