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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.ldap.codec.api.LdapConstants;
26  import org.apache.directory.api.ldap.codec.api.LdapMessageContainer;
27  import org.apache.directory.api.ldap.codec.decorators.SearchRequestDecorator;
28  import org.apache.directory.api.ldap.codec.search.AttributeValueAssertionFilter;
29  import org.apache.directory.api.ldap.codec.search.Filter;
30  import org.slf4j.Logger;
31  import org.slf4j.LoggerFactory;
32  
33  
34  /**
35   * The action used to initialize the Approx Match filter
36   * 
37   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
38   */
39  public class InitApproxMatchFilter extends GrammarAction<LdapMessageContainer<SearchRequestDecorator>>
40  {
41      /** The logger */
42      private static final Logger LOG = LoggerFactory.getLogger( InitApproxMatchFilter.class );
43  
44      /** Speedup for logs */
45      private static final boolean IS_DEBUG = LOG.isDebugEnabled();
46  
47  
48      /**
49       * Instantiates a new init approx match filter action.
50       */
51      public InitApproxMatchFilter()
52      {
53          super( "Init Approx Match filter Value" );
54      }
55  
56  
57      /**
58       * {@inheritDoc}
59       */
60      public void action( LdapMessageContainer<SearchRequestDecorator> container ) throws DecoderException
61      {
62          SearchRequestDecorator searchRequestDecorator = container.getMessage();
63  
64          // We can allocate the Attribute Value Assertion
65          Filter filter = new AttributeValueAssertionFilter( container.getTlvId(),
66              LdapConstants.APPROX_MATCH_FILTER );
67  
68          searchRequestDecorator.addCurrentFilter( filter );
69  
70          // Store the filter structure that still has to be
71          // fulfilled
72          searchRequestDecorator.setTerminalFilter( filter );
73  
74          if ( IS_DEBUG )
75          {
76              LOG.debug( "Initialize Approx Match filter" );
77          }
78      }
79  }