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.ber.tlv.TLV;
026    import org.apache.directory.shared.asn1.codec.DecoderException;
027    import org.apache.directory.shared.i18n.I18n;
028    import org.apache.directory.shared.ldap.codec.LdapMessageContainer;
029    import org.apache.directory.shared.ldap.codec.search.Filter;
030    import org.apache.directory.shared.ldap.codec.search.SearchRequestCodec;
031    import org.apache.directory.shared.ldap.codec.search.SubstringFilter;
032    import org.slf4j.Logger;
033    import org.slf4j.LoggerFactory;
034    
035    
036    /**
037     * The action used to initialize the Substrings filter
038     * 
039     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
040     * @version $Rev$, $Date$, 
041     */
042    public class InitSubstringsFilterAction extends GrammarAction
043    {
044        /** The logger */
045        private static final Logger log = LoggerFactory.getLogger( InitSubstringsFilterAction.class );
046    
047        /** Speedup for logs */
048        private static final boolean IS_DEBUG = log.isDebugEnabled();
049    
050        public InitSubstringsFilterAction()
051        {
052            super( "Initialize Substrings filter" );
053        }
054    
055        /**
056         * The initialization action
057         */
058        public void action( IAsn1Container container ) throws DecoderException
059        {
060            LdapMessageContainer ldapMessageContainer = ( LdapMessageContainer ) container;
061            SearchRequestCodec searchRequest = ldapMessageContainer.getSearchRequest();
062    
063            TLV tlv = ldapMessageContainer.getCurrentTLV();
064    
065            int expectedLength = tlv.getLength();
066    
067            if ( expectedLength == 0 )
068            {
069                log.error( I18n.err( I18n.ERR_04012 ) );
070                throw new DecoderException( I18n.err( I18n.ERR_04012 ) );
071            }
072    
073            // We can allocate the SearchRequest
074            Filter substringFilter = new SubstringFilter( ldapMessageContainer.getTlvId() );
075    
076            searchRequest.addCurrentFilter( substringFilter );
077            searchRequest.setTerminalFilter( substringFilter );
078    
079            // As this is a new Constructed object, we have to init its
080            // length
081    
082            substringFilter.setExpectedLength( expectedLength );
083            substringFilter.setCurrentLength( 0 );
084            
085            if ( IS_DEBUG )
086            {
087                log.debug( "Initialize Substrings filter" );
088            }
089        }
090    }