1 /* 2 * Copyright (c) 2015, 2019, 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.security.AccessController; 29 import java.security.PrivilegedAction; 30 31 /** 32 * Creates this platform's default SelectorProvider 33 */ 34 35 public class DefaultSelectorProvider { 36 private static final SelectorProviderImpl INSTANCE; 37 static { 38 PrivilegedAction<SelectorProviderImpl> pa = DevPollSelectorProvider::new; 39 INSTANCE = AccessController.doPrivileged(pa); 40 } 41 42 /** 43 * Prevent instantiation. 44 */ 45 private DefaultSelectorProvider() { } 46 47 /** 48 * Returns the default SelectorProvider implementation. 49 */ 50 public static SelectorProviderImpl get() { 51 return INSTANCE; 52 } 53 }