01: /*
02: * @(#)PrivilegedAction.java 1.12 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 java.security;
29:
30: /**
31: * A computation to be performed with privileges enabled. The computation is
32: * performed by invoking <code>AccessController.doPrivileged</code> on the
33: * <code>PrivilegedAction</code> object. This interface is used only for
34: * computations that do not throw checked exceptions; computations that
35: * throw checked exceptions must use <code>PrivilegedExceptionAction</code>
36: * instead.
37: *
38: * @see AccessController
39: * @see AccessController#doPrivileged(PrivilegedAction)
40: * @see PrivilegedExceptionAction
41: */
42:
43: public interface PrivilegedAction {
44: /**
45: * Performs the computation. This method will be called by
46: * <code>AccessController.doPrivileged</code> after enabling privileges.
47: *
48: * @return a class-dependent value that may represent the results of the
49: * computation. Each class that implements
50: * <code>PrivilegedAction</code>
51: * should document what (if anything) this value represents.
52: * @see AccessController#doPrivileged(PrivilegedAction)
53: * @see AccessController#doPrivileged(PrivilegedAction,
54: * AccessControlContext)
55: */
56: Object run();
57: }
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