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 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 // 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