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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    *   http://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  
20  import java.net.ProtocolFamily;
21  import java.net.StandardProtocolFamily;
22  
23  /**
24   * Helper class which convert the {@link InternetProtocolFamily}.
25   */
26  final class ProtocolFamilyConverter {
27  
28      private ProtocolFamilyConverter() {
29          // Utility class
30      }
31  
32      /**
33       * Convert the {@link InternetProtocolFamily}. This MUST only be called on jdk version >= 7.
34       */
35      public static ProtocolFamily convert(InternetProtocolFamily family) {
36          switch (family) {
37          case IPv4:
38              return StandardProtocolFamily.INET;
39          case IPv6:
40              return StandardProtocolFamily.INET6;
41          default:
42              throw new IllegalArgumentException();
43          }
44      }
45  }