01: /*
02: * @(#)LoadLibraryAction.java 1.13 06/10/10
03: *
04: * Copyright 1990-2006 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License version
09: * 2 only, as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License version 2 for more details (a copy is
15: * included at /legal/license.txt).
16: *
17: * You should have received a copy of the GNU General Public License
18: * version 2 along with this work; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA
21: *
22: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23: * Clara, CA 95054 or visit www.sun.com if you need additional
24: * information or have any questions.
25: *
26: */
27:
28: package sun.security.action;
29:
30: /**
31: * A convenience class for loading a system library as a privileged action.
32: *
33: * <p>An instance of this class can be used as the argument of
34: * <code>AccessController.doPrivileged</code>.
35: *
36: * <p>The following code attempts to load the system library named
37: * <code>"lib"</code> as a privileged action: <p>
38: *
39: * <pre>
40: * java.security.AccessController.doPrivileged(new LoadLibraryAction("lib"));
41: * </pre>
42: *
43: * @author Roland Schemers
44: * @version 1.6, 02/02/00
45: * @see java.security.PrivilegedAction
46: * @see java.security.AccessController
47: * @since JDK1.2
48: */
49:
50: public class LoadLibraryAction implements
51: java.security.PrivilegedAction {
52: private String theLib;
53:
54: /**
55: * Constructor that takes the name of the system library that needs to be
56: * loaded.
57: *
58: * <p>The manner in which a library name is mapped to the
59: * actual system library is system dependent.
60: *
61: * @param theLib the name of the library.
62: */
63: public LoadLibraryAction(String theLib) {
64: this .theLib = theLib;
65: }
66:
67: /**
68: * Loads the system library whose name was specified in the constructor.
69: */
70: public Object run() {
71: System.loadLibrary(theLib);
72: return null;
73: }
74: }
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