1 /* 2 * Copyright (c) 2011, 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 import java.net.InetAddress; 25 import java.net.UnknownHostException; 26 import sun.net.spi.nameservice.NameService; 27 28 public class ThrowingNameService implements NameService { 29 static boolean firstCall = true; 30 31 @Override 32 public InetAddress[] lookupAllHostAddr(String host) throws UnknownHostException { 33 if (firstCall) { 34 firstCall = false; 35 // throw unchecked exception first time round 36 throw new IllegalStateException(); 37 } 38 39 // return any valid address 40 return new InetAddress[] { InetAddress.getLoopbackAddress() }; 41 } 42 43 @Override 44 public String getHostByAddr(byte[] addr) throws UnknownHostException { 45 throw new IllegalStateException(); 46 } 47 }