1 /* 2 * Copyright (c) 1998, 2013, 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, that throws one or 31 * more checked exceptions. The computation is performed by invoking 32 * {@code AccessController.doPrivileged} on the 33 * {@code PrivilegedExceptionAction} 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} 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} 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} should document what 53 * (if anything) this value represents. 54 * @throws Exception an exceptional condition has occurred. Each class 55 * that implements {@code PrivilegedExceptionAction} 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 }