57 lines
2.3 KiB
Java
57 lines
2.3 KiB
Java
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/*
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* Copyright 1998-2004 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package java.security;
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/**
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* A computation to be performed with privileges enabled. The computation is
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* performed by invoking <code>AccessController.doPrivileged</code> on the
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* <code>PrivilegedAction</code> object. This interface is used only for
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* computations that do not throw checked exceptions; computations that
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* throw checked exceptions must use <code>PrivilegedExceptionAction</code>
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* instead.
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*
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* @see AccessController
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* @see AccessController#doPrivileged(PrivilegedAction)
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* @see PrivilegedExceptionAction
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*/
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public interface PrivilegedAction<T> {
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/**
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* Performs the computation. This method will be called by
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* <code>AccessController.doPrivileged</code> after enabling privileges.
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*
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* @return a class-dependent value that may represent the results of the
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* computation. Each class that implements
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* <code>PrivilegedAction</code>
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* should document what (if anything) this value represents.
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* @see AccessController#doPrivileged(PrivilegedAction)
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* @see AccessController#doPrivileged(PrivilegedAction,
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* AccessControlContext)
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*/
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T run();
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}
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