1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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 sun.nio.ch;
27 
28 import java.nio.channels.spi.AsynchronousChannelProvider;
29 import java.security.AccessController;
30 import sun.security.action.GetPropertyAction;
31 
32 /**
33  * Creates this platform's default asynchronous channel provider
34  */
35 
36 public class DefaultAsynchronousChannelProvider {
37 
38     /**
39      * Prevent instantiation.
40      */
DefaultAsynchronousChannelProvider()41     private DefaultAsynchronousChannelProvider() { }
42 
43     @SuppressWarnings("unchecked")
createProvider(String cn)44     private static AsynchronousChannelProvider createProvider(String cn) {
45         Class<AsynchronousChannelProvider> c;
46         try {
47             c = (Class<AsynchronousChannelProvider>)Class.forName(cn);
48         } catch (ClassNotFoundException x) {
49             throw new AssertionError(x);
50         }
51         try {
52             return c.newInstance();
53         } catch (IllegalAccessException | InstantiationException x) {
54             throw new AssertionError(x);
55         }
56 
57     }
58 
59     /**
60      * Returns the default AsynchronousChannelProvider.
61      */
create()62     public static AsynchronousChannelProvider create() {
63         // BEGIN Android-changed: Hardcode AsynchronousChannelProvider provider.
64         /*
65         String osname = AccessController
66             .doPrivileged(new GetPropertyAction("os.name"));
67         if (osname.equals("SunOS"))
68             return createProvider("sun.nio.ch.SolarisAsynchronousChannelProvider");
69         if (osname.equals("Linux"))
70             return createProvider("sun.nio.ch.LinuxAsynchronousChannelProvider");
71         if (osname.contains("OS X"))
72             return createProvider("sun.nio.ch.BsdAsynchronousChannelProvider");
73         if (osname.equals("AIX"))
74             return createProvider("sun.nio.ch.AixAsynchronousChannelProvider");
75         throw new InternalError("platform not recognized");
76         */
77         return createProvider("sun.nio.ch.LinuxAsynchronousChannelProvider");
78         // END Android-changed: Hardcode AsynchronousChannelProvider provider.
79     }
80 }
81