1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
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8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
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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
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19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24  */
25 
26 package jdk.internal.net.http;
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 
PrivilegedExecutor(Executor executor, AccessControlContext acc)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;
PrivilegedRunnable(Runnable r, AccessControlContext acc)54         PrivilegedRunnable(Runnable r, AccessControlContext acc) {
55             this.r = r;
56             this.acc = acc;
57         }
58         @Override
run()59         public void run() {
60             PrivilegedAction<Void> pa = () -> { r.run(); return null; };
61             AccessController.doPrivileged(pa, acc);
62         }
63     }
64 
65     @Override
execute(Runnable r)66     public void execute(Runnable r) {
67         executor.execute(new PrivilegedRunnable(r, acc));
68     }
69 }
70