1 /* 2 * Copyright (c) 2021, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package impl; 25 26 import java.net.InetAddress; 27 import java.net.UnknownHostException; 28 import java.net.spi.InetAddressResolver; 29 import java.net.spi.InetAddressResolverProvider; 30 import java.util.stream.Stream; 31 32 public class InetAddressUsageInGetProviderImpl extends InetAddressResolverProvider { 33 @Override 34 public InetAddressResolver get(Configuration configuration) { 35 System.out.println("The following provider will be used by current test:" + this.getClass().getCanonicalName()); 36 String localHostName; 37 try { 38 localHostName = InetAddress.getLocalHost().getHostName(); 39 } catch (UnknownHostException e) { 40 throw new RuntimeException("Provider failed to initialize"); 41 } 42 return new InetAddressResolver() { 43 @Override 44 public Stream<InetAddress> lookupAddresses(String host, LookupPolicy lookupPolicy) throws UnknownHostException { 45 if (host.equals(localHostName)) { 46 return configuration.builtinResolver().lookupAddresses(host, lookupPolicy); 47 } else { 48 throw new UnknownHostException(host); 49 } 50 } 51 52 @Override 53 public String lookupHostName(byte[] addr) throws UnknownHostException { 54 return configuration.builtinResolver().lookupHostName(addr); 55 } 56 }; 57 } 58 59 @Override 60 public String name() { 61 return "ProviderWithInetAddressUsageInGet"; 62 } 63 }