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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *  
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *  
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License. 
18   *  
19   */
20  package org.apache.directory.server.ldap;
21  
22  
23  import org.apache.directory.server.core.DirectoryService;
24  import org.apache.directory.server.schema.registries.AttributeTypeRegistry;
25  import org.apache.directory.shared.asn1.codec.Asn1CodecDecoder;
26  import org.apache.directory.shared.asn1.codec.Asn1CodecEncoder;
27  import org.apache.directory.shared.ldap.message.MessageDecoder;
28  import org.apache.directory.shared.ldap.message.MessageEncoder;
29  import org.apache.directory.shared.ldap.message.spi.BinaryAttributeDetector;
30  import org.apache.directory.shared.ldap.schema.AttributeType;
31  import org.apache.mina.filter.codec.ProtocolCodecFactory;
32  import org.apache.mina.filter.codec.ProtocolDecoder;
33  import org.apache.mina.filter.codec.ProtocolEncoder;
34  
35  
36  /**
37   * An LDAP BER Decoder/Encoder factory implementing {@link ProtocolCodecFactory}.
38   *
39   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
40   * @version $Rev$
41   */
42  final class LdapProtocolCodecFactory implements ProtocolCodecFactory
43  {
44      /** the directory service for which this factor generates codecs */
45      final private DirectoryService directoryService;
46  
47  
48      /**
49       * Creates a new instance of LdapProtocolCodecFactory.
50       *
51       * @param directoryService the {@link DirectoryService} for which this 
52       * factory generates codecs.
53       */
54      public LdapProtocolCodecFactory( DirectoryService directoryService )
55      {
56          this.directoryService = directoryService;
57      }
58  
59  
60      /*
61       * (non-Javadoc)
62       * @see org.apache.mina.filter.codec.ProtocolCodecFactory#getEncoder()
63       */
64      public ProtocolEncoder getEncoder()
65      {
66          return new Asn1CodecEncoder( new MessageEncoder() );
67      }
68  
69  
70      /*
71       * (non-Javadoc)
72       * @see org.apache.mina.filter.codec.ProtocolCodecFactory#getDecoder()
73       */
74      public ProtocolDecoder getDecoder()
75      {
76          return new Asn1CodecDecoder( new MessageDecoder( new BinaryAttributeDetector()
77          {
78              public boolean isBinary( String id )
79              {
80                  AttributeTypeRegistry attrRegistry = directoryService.getRegistries().getAttributeTypeRegistry();
81                  try
82                  {
83                      AttributeType type = attrRegistry.lookup( id );
84                      return ! type.getSyntax().isHumanReadable();
85                  }
86                  catch ( Exception e )
87                  {
88                      return false;
89                  }
90              }
91          }) );
92      }
93  }