1 /* 2 * Copyright (c) 1998, 2004, 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 java.security; 27 28 29 /** 30 * A computation to be performed with privileges enabled. The computation is 31 * performed by invoking <code>AccessController.doPrivileged</code> on the 32 * <code>PrivilegedAction</code> object. This interface is used only for 33 * computations that do not throw checked exceptions; computations that 34 * throw checked exceptions must use <code>PrivilegedExceptionAction</code> 35 * instead. 36 * 37 * @see AccessController 38 * @see AccessController#doPrivileged(PrivilegedAction) 39 * @see PrivilegedExceptionAction 40 */ 41 42 public interface PrivilegedAction<T> { 43 /** 44 * Performs the computation. This method will be called by 45 * <code>AccessController.doPrivileged</code> after enabling privileges. 46 * 47 * @return a class-dependent value that may represent the results of the 48 * computation. Each class that implements 49 * <code>PrivilegedAction</code> 50 * should document what (if anything) this value represents. 51 * @see AccessController#doPrivileged(PrivilegedAction) 52 * @see AccessController#doPrivileged(PrivilegedAction, 53 * AccessControlContext) 54 */ 55 T run(); 56 }