001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one
003     *  or more contributor license agreements.  See the NOTICE file
004     *  distributed with this work for additional information
005     *  regarding copyright ownership.  The ASF licenses this file
006     *  to you under the Apache License, Version 2.0 (the
007     *  "License"); you may not use this file except in compliance
008     *  with the License.  You may obtain a copy of the License at
009     *  
010     *    http://www.apache.org/licenses/LICENSE-2.0
011     *  
012     *  Unless required by applicable law or agreed to in writing,
013     *  software distributed under the License is distributed on an
014     *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     *  KIND, either express or implied.  See the License for the
016     *  specific language governing permissions and limitations
017     *  under the License. 
018     *  
019     */
020    package org.apache.directory.shared.ldap.codec.actions;
021    
022    
023    import org.apache.directory.shared.asn1.ber.IAsn1Container;
024    import org.apache.directory.shared.asn1.ber.grammar.GrammarAction;
025    import org.apache.directory.shared.asn1.codec.DecoderException;
026    import org.apache.directory.shared.ldap.codec.LdapConstants;
027    import org.apache.directory.shared.ldap.codec.LdapMessageContainer;
028    import org.apache.directory.shared.ldap.codec.search.AttributeValueAssertionFilter;
029    import org.apache.directory.shared.ldap.codec.search.Filter;
030    import org.apache.directory.shared.ldap.codec.search.SearchRequestCodec;
031    import org.slf4j.Logger;
032    import org.slf4j.LoggerFactory;
033    
034    
035    /**
036     * The action used to initialize the Approx Match filter
037     * 
038     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
039     * @version $Rev$, $Date$, 
040     */
041    public class InitApproxMatchFilterAction extends GrammarAction
042    {
043        /** The logger */
044        private static final Logger log = LoggerFactory.getLogger( InitApproxMatchFilterAction.class );
045    
046        /** Speedup for logs */
047        private static final boolean IS_DEBUG = log.isDebugEnabled();
048    
049        public InitApproxMatchFilterAction()
050        {
051            super( "Init Approx Match filter Value" );
052        }
053    
054        public void action( IAsn1Container container ) throws DecoderException
055        {
056            LdapMessageContainer ldapMessageContainer = ( LdapMessageContainer ) container;
057            SearchRequestCodec searchRequest = ldapMessageContainer.getSearchRequest();
058    
059            // We can allocate the Attribute Value Assertion
060            Filter filter = new AttributeValueAssertionFilter( 
061                ldapMessageContainer.getTlvId(),
062                LdapConstants.APPROX_MATCH_FILTER );
063    
064            searchRequest.addCurrentFilter( filter );
065            
066            // Store the filter structure that still has to be
067            // fullfiled
068            searchRequest.setTerminalFilter( filter );
069            
070            if ( IS_DEBUG )
071            {
072                log.debug( "Initialize Approx Match filter" );
073            }
074        }
075    }