1 /*
2 * Copyright 1998-2004 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package java.security;
27
28
29 /**
30 * A computation to be performed with privileges enabled, that throws one or
31 * more checked exceptions. The computation is performed by invoking
32 * <code>AccessController.doPrivileged</code> on the
33 * <code>PrivilegedExceptionAction</code> object. This interface is
34 * used only for computations that throw checked exceptions;
35 * computations that do not throw
36 * checked exceptions should use <code>PrivilegedAction</code> instead.
37 *
38 * @see AccessController
39 * @see AccessController#doPrivileged(PrivilegedExceptionAction)
40 * @see AccessController#doPrivileged(PrivilegedExceptionAction,
41 * AccessControlContext)
42 * @see PrivilegedAction
43 */
44
45 public interface PrivilegedExceptionAction<T> {
46 /**
47 * Performs the computation. This method will be called by
48 * <code>AccessController.doPrivileged</code> after enabling privileges.
49 *
50 * @return a class-dependent value that may represent the results of the
51 * computation. Each class that implements
52 * <code>PrivilegedExceptionAction</code> should document what
53 * (if anything) this value represents.
54 * @throws Exception an exceptional condition has occurred. Each class
55 * that implements <code>PrivilegedExceptionAction</code> should
56 * document the exceptions that its run method can throw.
57 * @see AccessController#doPrivileged(PrivilegedExceptionAction)
58 * @see AccessController#doPrivileged(PrivilegedExceptionAction,AccessControlContext)
59 */
60
61 T run() throws Exception;
62 }
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