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 return c.newInstance(); 52 } catch (IllegalAccessException | InstantiationException x) { 53 throw new AssertionError(x); 54 } 55 56 } 57 58 /** 59 * Returns the default AsynchronousChannelProvider. 60 */ 61 public static AsynchronousChannelProvider create() { 62 String osname = GetPropertyAction.getProperty("os.name"); 63 if (osname.equals("SunOS")) 64 return createProvider("sun.nio.ch.SolarisAsynchronousChannelProvider"); 65 if (osname.equals("Linux")) 66 return createProvider("sun.nio.ch.LinuxAsynchronousChannelProvider"); 67 if (osname.contains("OS X")) 68 return createProvider("sun.nio.ch.BsdAsynchronousChannelProvider"); 69 if (osname.equals("AIX")) 70 return createProvider("sun.nio.ch.AixAsynchronousChannelProvider"); 71 throw new InternalError("platform not recognized"); 72 } 73 }