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1   /*
2    * Copyright 2012 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   https://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.channel.socket.nio;
17  
18  import io.netty.channel.socket.InternetProtocolFamily;
19  import io.netty.util.internal.SuppressJava6Requirement;
20  
21  import java.net.ProtocolFamily;
22  import java.net.StandardProtocolFamily;
23  
24  /**
25   * Helper class which convert the {@link InternetProtocolFamily}.
26   */
27  final class ProtocolFamilyConverter {
28  
29      private ProtocolFamilyConverter() {
30          // Utility class
31      }
32  
33      /**
34       * Convert the {@link InternetProtocolFamily}. This MUST only be called on jdk version >= 7.
35       */
36      @SuppressJava6Requirement(reason = "Usage guarded by java version check")
37      public static ProtocolFamily convert(InternetProtocolFamily family) {
38          switch (family) {
39          case IPv4:
40              return StandardProtocolFamily.INET;
41          case IPv6:
42              return StandardProtocolFamily.INET6;
43          default:
44              throw new IllegalArgumentException();
45          }
46      }
47  }