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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.accumulo.core.security.tokens;
18  
19  import java.io.DataInput;
20  import java.io.DataOutput;
21  import java.io.IOException;
22  
23  import javax.security.auth.DestroyFailedException;
24  
25  /**
26   * 
27   */
28  public class NullToken implements SecurityToken {
29    
30    @Override
31    public void readFields(DataInput arg0) throws IOException {
32      return;
33    }
34    
35    @Override
36    public void write(DataOutput arg0) throws IOException {
37      return;
38    }
39    
40    @Override
41    public void destroy() throws DestroyFailedException {
42      return;
43    }
44    
45    @Override
46    public boolean isDestroyed() {
47      return false;
48    }
49    
50    public NullToken clone() {
51      return new NullToken();
52    }
53  }