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3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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9    * by Oracle in the LICENSE file that accompanied this code.
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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
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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: <p>
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  }