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> lookupByName(String host, LookupPolicy lookupPolicy) throws UnknownHostException {
45                 if (host.equals(localHostName)) {
46                     return configuration.builtinResolver().lookupByName(host, lookupPolicy);
47                 } else {
48                     throw new UnknownHostException(host);
49                 }
50             }
51 
52             @Override
53             public String lookupByAddress(byte[] addr) throws UnknownHostException {
54                 return configuration.builtinResolver().lookupByAddress(addr);
55             }
56         };
57     }
58 
59     @Override
60     public String name() {
61         return "ProviderWithInetAddressUsageInGet";
62     }
63 }