1 /*

     2  * Copyright (c) 2008, 2012, 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 sun.nio.ch;

    27 

    28 import java.nio.channels.spi.AsynchronousChannelProvider;

    29 import sun.security.action.GetPropertyAction;

    30 

    31 /**

    32  * Creates this platform's default asynchronous channel provider

    33  */

    34 

    35 public class DefaultAsynchronousChannelProvider {

    36 

    37     /**

    38      * Prevent instantiation.

    39      */

    40     private DefaultAsynchronousChannelProvider() { }

    41 

    42     @SuppressWarnings("unchecked")

    43     private static AsynchronousChannelProvider createProvider(String cn) {

    44         Class<AsynchronousChannelProvider> c;

    45         try {

    46             c = (Class<AsynchronousChannelProvider>)Class.forName(cn);

    47         } catch (ClassNotFoundException x) {

    48             throw new AssertionError(x);

    49         }

    50         try {

    51             @SuppressWarnings("deprecation")

    52             AsynchronousChannelProvider result = c.newInstance();

    53             return result;

    54         } catch (IllegalAccessException | InstantiationException x) {

    55             throw new AssertionError(x);

    56         }

    57 

    58     }

    59 

    60     /**

    61      * Returns the default AsynchronousChannelProvider.

    62      */

    63     public static AsynchronousChannelProvider create() {

    64         String osname = GetPropertyAction.privilegedGetProperty("os.name");

    65         if (osname.equals("SunOS"))

    66             return createProvider("sun.nio.ch.SolarisAsynchronousChannelProvider");

    67         if (osname.equals("Linux"))

    68             return createProvider("sun.nio.ch.LinuxAsynchronousChannelProvider");

    69         if (osname.contains("OS X"))

    70             return createProvider("sun.nio.ch.BsdAsynchronousChannelProvider");

    71         if (osname.equals("AIX"))

    72             return createProvider("sun.nio.ch.AixAsynchronousChannelProvider");

    73         throw new InternalError("platform not recognized");

    74     }

    75 }