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1   /*
2    *   Copyright 2004 The Apache Software Foundation
3    *
4    *   Licensed under the Apache License, Version 2.0 (the "License");
5    *   you may not use this file except in compliance with the License.
6    *   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,
12   *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   *   See the License for the specific language governing permissions and
14   *   limitations under the License.
15   *
16   */
17  package org.apache.asn1.ber.digester.rules ;
18  
19  
20  import java.nio.ByteBuffer;
21  
22  import org.apache.asn1.ber.TagEnum;
23  
24  
25  /***
26   * Rule that collects octets and leaves octets as a string on the stack.
27   * 
28   * @author <a href="mailto:dev@directory.apache.org">Apache Directory
29   *         Project</a>
30   * @version $Rev: 157644 $
31   */
32  public class Octets2StringRule extends PrimitiveOctetStringRule
33  {
34      public Octets2StringRule()
35      {
36          super();
37      }
38  
39  
40      public Octets2StringRule( TagEnum tag )
41      {
42          super( tag );
43      }
44  
45  
46      /* (non-Javadoc)
47       * @see org.apache.snickers.ber.Rule#finish()
48       */
49      public void finish()
50      {
51          super.finish() ;
52  
53          // pop the ByteBuffer the super method pushed
54          ByteBuffer buf = ( ByteBuffer ) getDigester().pop() ;
55  
56          byte[] octets = null ;
57          if ( buf.limit() == buf.capacity() && buf.hasArray() )
58          {
59              // use the backing store
60              octets = buf.array() ;
61          }
62          else
63          {
64              // copy because we don't have accessible array or data < array
65              octets = new byte[buf.remaining()] ;
66              buf.get( octets ) ;
67          }
68  
69          getDigester().push( new String( octets ) ) ;
70      }
71  }