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1   /*
2    *   Copyright 2005 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  
18  package org.apache.asn1.der;
19  
20  import java.io.IOException;
21  import java.util.Enumeration;
22  
23  /***
24   * BER TaggedObject
25   */
26  public class BERTaggedObject extends DERTaggedObject
27  {
28      /***
29       * @param tag the tag number for this object.
30       * @param obj the tagged object.
31       */
32      public BERTaggedObject( int tag, DEREncodable obj )
33      {
34          super( tag, obj );
35      }
36  
37      /***
38       * @param true if an explicitly tagged object.
39       * @param tag the tag number for this object.
40       * @param obj the tagged object.
41       */
42      public BERTaggedObject( boolean explicit, int tag, DEREncodable obj )
43      {
44          super( explicit, tag, obj );
45      }
46      
47      public void encode( ASN1OutputStream out )
48          throws IOException
49      {
50          out.write( DERObject.CONSTRUCTED | DERObject.TAGGED | tag );
51          out.write( DERObject.TAGGED );
52  
53          if ( !empty )
54          {
55              if ( !explicit )
56              {
57                  if ( obj instanceof DEROctetString )
58                  {
59                      Enumeration e;
60  
61                      if ( obj instanceof BERConstructedOctetString )
62                      {
63                          e = ( (BERConstructedOctetString)obj ).getObjects();
64                      }
65                      else
66                      {
67                      	DEROctetString            octs = (DEROctetString)obj;
68                          BERConstructedOctetString berO = new BERConstructedOctetString( octs.getOctets() );
69  
70                          e = berO.getObjects();
71                      }
72  
73                      while ( e.hasMoreElements() )
74                      {
75                          out.writeObject( e.nextElement() );
76                      }
77                  }
78                  else if ( obj instanceof DERSequence )
79                  {
80                      Enumeration  e = ( (DERSequence)obj ).getObjects();
81  
82                      while ( e.hasMoreElements() )
83                      {
84                          out.writeObject( e.nextElement() );
85                      }
86                  }
87                  else
88                  {
89                      throw new RuntimeException( "Not implemented: " + obj.getClass().getName() );
90                  }
91              }
92              else
93              {
94                  out.writeObject( obj );
95              }
96          }
97  
98          out.write( DERObject.TERMINATOR );
99          out.write( DERObject.TERMINATOR );
100     }
101 }
102