1 /*

     2  * Copyright (c) 2015, 2018, 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.net.http.internal;

    27 

    28 import java.security.AccessControlContext;

    29 import java.security.AccessController;

    30 import java.security.PrivilegedAction;

    31 import java.util.Objects;

    32 import java.util.concurrent.Executor;

    33 

    34 /**

    35  * Executes tasks within a given access control context, and by a given executor.

    36  */

    37 class PrivilegedExecutor implements Executor {

    38 

    39     /** The underlying executor. May be provided by the user. */

    40     final Executor executor;

    41     /** The ACC to execute the tasks within. */

    42     final AccessControlContext acc;

    43 

    44     public PrivilegedExecutor(Executor executor, AccessControlContext acc) {

    45         Objects.requireNonNull(executor);

    46         Objects.requireNonNull(acc);

    47         this.executor = executor;

    48         this.acc = acc;

    49     }

    50 

    51     private static class PrivilegedRunnable implements Runnable {

    52         private final Runnable r;

    53         private final AccessControlContext acc;

    54         PrivilegedRunnable(Runnable r, AccessControlContext acc) {

    55             this.r = r;

    56             this.acc = acc;

    57         }

    58         @Override

    59         public void run() {

    60             PrivilegedAction<Void> pa = () -> { r.run(); return null; };

    61             AccessController.doPrivileged(pa, acc);

    62         }

    63     }

    64 

    65     @Override

    66     public void execute(Runnable r) {

    67         executor.execute(new PrivilegedRunnable(r, acc));

    68     }

    69 }