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 *    https://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 */
020package org.apache.directory.api.ldap.codec.actions.request.search.filter;
021
022
023import org.apache.directory.api.asn1.DecoderException;
024import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
025import org.apache.directory.api.asn1.ber.tlv.TLV;
026import org.apache.directory.api.i18n.I18n;
027import org.apache.directory.api.ldap.codec.api.LdapMessageContainer;
028import org.apache.directory.api.ldap.codec.search.PresentFilter;
029import org.apache.directory.api.ldap.model.message.SearchRequest;
030import org.apache.directory.api.util.Strings;
031
032import org.slf4j.Logger;
033import org.slf4j.LoggerFactory;
034
035
036/**
037 * The action used to initialize the Present filter
038 * 
039 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
040 */
041public class InitPresentFilter extends GrammarAction<LdapMessageContainer<SearchRequest>>
042{
043    /** The logger */
044    private static final Logger LOG = LoggerFactory.getLogger( InitPresentFilter.class );
045
046    /**
047     * Instantiates a new init present filter action.
048     */
049    public InitPresentFilter()
050    {
051        super( "Init present filter Value" );
052    }
053
054
055    /**
056     * {@inheritDoc}
057     */
058    public void action( LdapMessageContainer<SearchRequest> container ) throws DecoderException
059    {
060        TLV tlv = container.getCurrentTLV();
061
062        // We can allocate the Attribute Value Assertion
063        PresentFilter presentFilter = new PresentFilter( container.getTlvId() );
064
065        // add the filter to the request filter
066        container.addCurrentFilter( presentFilter );
067        container.setTerminalFilter( presentFilter );
068
069        String value = Strings.utf8ToString( tlv.getValue().getData() );
070
071        if ( Strings.isEmpty( value ) )
072        {
073            presentFilter.setAttributeDescription( "" );
074        }
075        else
076        {
077            // Store the value.
078            String type = Strings.utf8ToString( tlv.getValue().getData() );
079            presentFilter.setAttributeDescription( type );
080        }
081
082        // We now have to get back to the nearest filter which is
083        // not terminal.
084        container.unstackFilters();
085
086        if ( LOG.isDebugEnabled() )
087        {
088            LOG.debug( I18n.msg( I18n.MSG_05151_INITIALIZE_PRESENT_FILTER ) );
089        }
090    }
091}