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 loading a system library as a privileged action.

    30  *

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

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

    33  *

    34  * <p>The following code attempts to load the system library named

    35  * <code>"lib"</code> as a privileged action: <p>

    36  *

    37  * <pre>

    38  * java.security.AccessController.doPrivileged(new LoadLibraryAction("lib"));

    39  * </pre>

    40  *

    41  * @author Roland Schemers

    42  * @see java.security.PrivilegedAction

    43  * @see java.security.AccessController

    44  * @since 1.2

    45  */

    46 

    47 public class LoadLibraryAction implements java.security.PrivilegedAction<Void> {

    48     private String theLib;

    49 

    50     /**

    51      * Constructor that takes the name of the system library that needs to be

    52      * loaded.

    53      *

    54      * <p>The manner in which a library name is mapped to the

    55      * actual system library is system dependent.

    56      *

    57      * @param theLib the name of the library.

    58      */

    59     public LoadLibraryAction(String theLib) {

    60         this.theLib = theLib;

    61     }

    62 

    63     /**

    64      * Loads the system library whose name was specified in the constructor.

    65      */

    66     public Void run() {

    67         System.loadLibrary(theLib);

    68         return null;

    69     }

    70 }