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
26package sun.nio.ch;
27
28import java.nio.channels.spi.AsynchronousChannelProvider;
29import java.security.AccessController;
30import sun.security.action.GetPropertyAction;
31
32/**
33 * Creates this platform's default asynchronous channel provider
34 */
35
36public class DefaultAsynchronousChannelProvider {
37
38    /**
39     * Prevent instantiation.
40     */
41    private DefaultAsynchronousChannelProvider() { }
42
43    @SuppressWarnings("unchecked")
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     */
62    public static AsynchronousChannelProvider create() {
63        // Android-changed: Android is Linux based.
64        // String osname = AccessController
65        //    .doPrivileged(new GetPropertyAction("os.name"));
66        //
67        // if (osname.equals("SunOS"))
68        //     return new SolarisAsynchronousChannelProvider();
69        // if (osname.equals("Linux"))
70        return createProvider("sun.nio.ch.LinuxAsynchronousChannelProvider");
71        // if (osname.contains("OS X"))
72        //    return new BsdAsynchronousChannelProvider();
73        // throw new InternalError("platform not recognized");
74    }
75
76}
77