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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.api.ldap.codec.actions.modifyRequest;
21  
22  
23  import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
24  import org.apache.directory.api.asn1.ber.tlv.TLV;
25  import org.apache.directory.api.ldap.codec.api.LdapMessageContainer;
26  import org.apache.directory.api.ldap.codec.decorators.ModifyRequestDecorator;
27  import org.apache.directory.api.ldap.model.exception.LdapException;
28  import org.apache.directory.api.util.Strings;
29  import org.slf4j.Logger;
30  import org.slf4j.LoggerFactory;
31  
32  
33  /**
34   * The action used to store a Value to an modifyRequest
35   * 
36   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
37   */
38  public class StoreModifyRequestAttributeValue extends GrammarAction<LdapMessageContainer<ModifyRequestDecorator>>
39  {
40      /** The logger */
41      private static final Logger LOG = LoggerFactory.getLogger( StoreModifyRequestAttributeValue.class );
42  
43      /** Speedup for logs */
44      private static final boolean IS_DEBUG = LOG.isDebugEnabled();
45  
46  
47      /**
48       * Instantiates a new modify attribute value action.
49       */
50      public StoreModifyRequestAttributeValue()
51      {
52          super( "Stores AttributeValue" );
53      }
54  
55  
56      /**
57       * {@inheritDoc}
58       */
59      public void action( LdapMessageContainer<ModifyRequestDecorator> container )
60      {
61          ModifyRequestDecorator modifyRequestDecorator = container.getMessage();
62  
63          TLV tlv = container.getCurrentTLV();
64  
65          // Store the value. It can't be null
66          byte[] value = Strings.EMPTY_BYTES;
67  
68          try
69          {
70              if ( tlv.getLength() == 0 )
71              {
72                  modifyRequestDecorator.addAttributeValue( "" );
73              }
74              else
75              {
76                  value = tlv.getValue().getData();
77  
78                  if ( container.isBinary( modifyRequestDecorator.getCurrentAttributeType() ) )
79                  {
80                      modifyRequestDecorator.addAttributeValue( value );
81                  }
82                  else
83                  {
84                      modifyRequestDecorator.addAttributeValue( Strings.utf8ToString( ( byte[] ) value ) );
85                  }
86              }
87          }
88          catch ( LdapException le )
89          {
90              // Just swallow the exception, it can't occur here
91          }
92  
93          // We can have an END transition
94          container.setGrammarEndAllowed( true );
95  
96          if ( IS_DEBUG )
97          {
98              LOG.debug( "Value modified : {}", value );
99          }
100     }
101 }