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