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.PresentFilter;
030 import org.apache.directory.shared.ldap.codec.search.SearchRequestCodec;
031 import org.apache.directory.shared.ldap.util.StringTools;
032
033 import org.slf4j.Logger;
034 import org.slf4j.LoggerFactory;
035
036
037 /**
038 * The action used to initialize the Present filter
039 *
040 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
041 * @version $Rev$, $Date$,
042 */
043 public class InitPresentFilterAction extends GrammarAction
044 {
045 /** The logger */
046 private static final Logger log = LoggerFactory.getLogger( InitPresentFilterAction.class );
047
048 /** Speedup for logs */
049 private static final boolean IS_DEBUG = log.isDebugEnabled();
050
051 public InitPresentFilterAction()
052 {
053 super( "Init present filter Value" );
054 }
055
056 public void action( IAsn1Container container ) throws DecoderException
057 {
058 LdapMessageContainer ldapMessageContainer = ( LdapMessageContainer ) container;
059 LdapMessageCodec ldapMessage = ldapMessageContainer.getLdapMessage();
060 SearchRequestCodec searchRequest = ldapMessage.getSearchRequest();
061
062 TLV tlv = ldapMessageContainer.getCurrentTLV();
063
064 // We can allocate the Attribute Value Assertion
065 PresentFilter presentFilter = new PresentFilter( ldapMessageContainer.getTlvId() );
066
067 // add the filter to the request filter
068 searchRequest.addCurrentFilter( presentFilter );
069 searchRequest.setTerminalFilter( presentFilter );
070
071 String value = StringTools.utf8ToString( tlv.getValue().getData() );
072
073 if ( StringTools.isEmpty( value ) )
074 {
075 presentFilter.setAttributeDescription( "" );
076 }
077 else
078 {
079 // Store the value.
080 String type = StringTools.utf8ToString( tlv.getValue().getData() );
081 presentFilter.setAttributeDescription( type );
082 }
083
084 // We now have to get back to the nearest filter which is
085 // not terminal.
086 searchRequest.unstackFilters( container );
087
088 if ( IS_DEBUG )
089 {
090 log.debug( "Initialize Present filter" );
091 }
092 }
093 }