Save This Page
Home » openjdk-7 » java » security » [javadoc | source]
    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   }

Save This Page
Home » openjdk-7 » java » security » [javadoc | source]