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.ldap.codec.LdapMessageCodec;
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
033 import org.slf4j.Logger;
034 import org.slf4j.LoggerFactory;
035
036
037 /**
038 * The action used to initialize the Substrings filter
039 *
040 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
041 * @version $Rev$, $Date$,
042 */
043 public class InitSubstringsFilterAction extends GrammarAction
044 {
045 /** The logger */
046 private static final Logger log = LoggerFactory.getLogger( InitSubstringsFilterAction.class );
047
048 /** Speedup for logs */
049 private static final boolean IS_DEBUG = log.isDebugEnabled();
050
051 public InitSubstringsFilterAction()
052 {
053 super( "Initialize Substrings filter" );
054 }
055
056 /**
057 * The initialization action
058 */
059 public void action( IAsn1Container container ) throws DecoderException
060 {
061 LdapMessageContainer ldapMessageContainer = ( LdapMessageContainer ) container;
062 LdapMessageCodec ldapMessage = ldapMessageContainer.getLdapMessage();
063 SearchRequestCodec searchRequest = ldapMessage.getSearchRequest();
064
065 TLV tlv = ldapMessageContainer.getCurrentTLV();
066
067 int expectedLength = tlv.getLength();
068
069 if ( expectedLength == 0 )
070 {
071 log.error( "The Substring filter PDU must not be empty" );
072 throw new DecoderException( "The Substring filter PDU must not be empty" );
073 }
074
075 // We can allocate the SearchRequest
076 Filter substringFilter = new SubstringFilter( ldapMessageContainer.getTlvId() );
077
078 searchRequest.addCurrentFilter( substringFilter );
079 searchRequest.setTerminalFilter( substringFilter );
080
081 // As this is a new Constructed object, we have to init its
082 // length
083
084 substringFilter.setExpectedLength( expectedLength );
085 substringFilter.setCurrentLength( 0 );
086
087 if ( IS_DEBUG )
088 {
089 log.debug( "Initialize Substrings filter" );
090 }
091 }
092 }