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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  package org.apache.http.impl.client;
28  
29  import org.apache.http.annotation.Immutable;
30  import org.apache.http.client.UserTokenHandler;
31  import org.apache.http.protocol.HttpContext;
32  
33  /**
34   * Noop implementation of {@link UserTokenHandler} that always returns {@code null}.
35   *
36   * @since 4.3
37   */
38  @Immutable
39  public class NoopUserTokenHandler implements UserTokenHandler {
40  
41      public static final NoopUserTokenHandler INSTANCE = new NoopUserTokenHandler();
42  
43      @Override
44      public Object getUserToken(final HttpContext context) {
45          return null;
46      }
47  
48  }