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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.searchRequest.filter;
21  
22  
23  import org.apache.directory.api.asn1.DecoderException;
24  import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
25  import org.apache.directory.api.asn1.ber.tlv.TLV;
26  import org.apache.directory.api.ldap.codec.AttributeValueAssertion;
27  import org.apache.directory.api.ldap.codec.api.LdapMessageContainer;
28  import org.apache.directory.api.ldap.codec.decorators.SearchRequestDecorator;
29  import org.apache.directory.api.ldap.codec.search.AttributeValueAssertionFilter;
30  import org.apache.directory.api.ldap.model.entry.BinaryValue;
31  import org.apache.directory.api.ldap.model.entry.StringValue;
32  import org.apache.directory.api.ldap.model.entry.Value;
33  import org.apache.directory.api.util.StringConstants;
34  import org.apache.directory.api.util.Strings;
35  import org.slf4j.Logger;
36  import org.slf4j.LoggerFactory;
37  
38  
39  /**
40   * The action used to initialize the Assertion Value filter
41   * 
42   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
43   */
44  public class InitAssertionValueFilter extends GrammarAction<LdapMessageContainer<SearchRequestDecorator>>
45  {
46      /** The logger */
47      private static final Logger LOG = LoggerFactory.getLogger( InitAssertionValueFilter.class );
48  
49      /** Speedup for logs */
50      private static final boolean IS_DEBUG = LOG.isDebugEnabled();
51  
52  
53      /**
54       * Instantiates a new init assertion value filter action.
55       */
56      public InitAssertionValueFilter()
57      {
58          super( "Initialize Assertion Value filter" );
59      }
60  
61  
62      /**
63       * {@inheritDoc}
64       */
65      public void action( LdapMessageContainer<SearchRequestDecorator> container ) throws DecoderException
66      {
67          SearchRequestDecorator searchRequestDecorator = container.getMessage();
68  
69          TLV tlv = container.getCurrentTLV();
70  
71          // The value can be null.
72          Value<?> assertionValue = null;
73  
74          if ( tlv.getLength() != 0 )
75          {
76              assertionValue = new BinaryValue( tlv.getValue().getData() );
77          }
78          else
79          {
80              assertionValue = new BinaryValue( StringConstants.EMPTY_BYTES );
81          }
82  
83          AttributeValueAssertionFilter terminalFilter = ( AttributeValueAssertionFilter )
84              searchRequestDecorator.getTerminalFilter();
85          AttributeValueAssertion assertion = terminalFilter.getAssertion();
86  
87          if ( container.isBinary( assertion.getAttributeDesc() ) )
88          {
89              if ( tlv.getLength() != 0 )
90              {
91                  assertionValue = new BinaryValue( tlv.getValue().getData() );
92              }
93              else
94              {
95                  assertionValue = new BinaryValue( StringConstants.EMPTY_BYTES );
96              }
97  
98              assertion.setAssertionValue( assertionValue );
99          }
100         else
101         {
102             if ( tlv.getLength() != 0 )
103             {
104                 assertionValue = new StringValue( Strings.utf8ToString( tlv.getValue().getData() ) );
105             }
106             else
107             {
108                 assertionValue = new StringValue( "" );
109             }
110 
111             assertion.setAssertionValue( assertionValue );
112         }
113 
114         // We now have to get back to the nearest filter which is
115         // not terminal.
116         searchRequestDecorator.unstackFilters( container );
117 
118         if ( IS_DEBUG )
119         {
120             LOG.debug( "Initialize Assertion Value filter" );
121         }
122     }
123 }