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1   /*
2    * Copyright 2014 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.handler.ssl;
17  
18  import java.util.Collections;
19  import java.util.List;
20  
21  import javax.net.ssl.SSLEngine;
22  
23  /**
24   * The {@link JdkApplicationProtocolNegotiator} to use if you do not care about NPN or ALPN and are using
25   * {@link SslProvider#JDK}.
26   */
27  final class JdkDefaultApplicationProtocolNegotiator implements JdkApplicationProtocolNegotiator {
28      public static final JdkDefaultApplicationProtocolNegotiator INSTANCE =
29              new JdkDefaultApplicationProtocolNegotiator();
30      private static final SslEngineWrapperFactory DEFAULT_SSL_ENGINE_WRAPPER_FACTORY = new SslEngineWrapperFactory() {
31          @Override
32          public SSLEngine wrapSslEngine(SSLEngine engine,
33                                         JdkApplicationProtocolNegotiator applicationNegotiator, boolean isServer) {
34              return engine;
35          }
36      };
37  
38      private JdkDefaultApplicationProtocolNegotiator() {
39      }
40  
41      @Override
42      public SslEngineWrapperFactory wrapperFactory() {
43          return DEFAULT_SSL_ENGINE_WRAPPER_FACTORY;
44      }
45  
46      @Override
47      public ProtocolSelectorFactory protocolSelectorFactory() {
48          throw new UnsupportedOperationException("Application protocol negotiation unsupported");
49      }
50  
51      @Override
52      public ProtocolSelectionListenerFactory protocolListenerFactory() {
53          throw new UnsupportedOperationException("Application protocol negotiation unsupported");
54      }
55  
56      @Override
57      public List<String> protocols() {
58          return Collections.emptyList();
59      }
60  }