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.ber.grammar.GrammarAction;
024import org.apache.directory.api.asn1.ber.tlv.TLV;
025import org.apache.directory.api.i18n.I18n;
026import org.apache.directory.api.ldap.codec.AttributeValueAssertion;
027import org.apache.directory.api.ldap.codec.api.LdapMessageContainer;
028import org.apache.directory.api.ldap.codec.search.AttributeValueAssertionFilter;
029import org.apache.directory.api.ldap.model.message.SearchRequest;
030import org.apache.directory.api.util.Strings;
031import org.slf4j.Logger;
032import org.slf4j.LoggerFactory;
033
034
035/**
036 * The action used to initialize the Assertion Value filter
037 * 
038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
039 */
040public class InitAssertionValueFilter extends GrammarAction<LdapMessageContainer<SearchRequest>>
041{
042    /** The logger */
043    private static final Logger LOG = LoggerFactory.getLogger( InitAssertionValueFilter.class );
044
045    /**
046     * Instantiates a new init assertion value filter action.
047     */
048    public InitAssertionValueFilter()
049    {
050        super( "Initialize Assertion Value filter" );
051    }
052
053
054    /**
055     * {@inheritDoc}
056     */
057    public void action( LdapMessageContainer<SearchRequest> container )
058    {
059        TLV tlv = container.getCurrentTLV();
060
061        // The value can be null.
062        byte[] assertion = tlv.getValue().getData();
063        
064        AttributeValueAssertionFilter terminalFilter = ( AttributeValueAssertionFilter )
065            container.getTerminalFilter();
066        AttributeValueAssertion attributeValueAssertion = terminalFilter.getAssertion();
067
068        if ( assertion == null )
069        {
070            attributeValueAssertion.setAssertion( Strings.EMPTY_BYTES );
071        }
072        else
073        {
074            attributeValueAssertion.setAssertion( assertion );
075        }
076
077        // We now have to get back to the nearest filter which is
078        // not terminal.
079        container.unstackFilters();
080
081        if ( LOG.isDebugEnabled() )
082        {
083            LOG.debug( I18n.msg( I18n.MSG_05144_INITIALIZE_ASSERTION_FILTER ) );
084        }
085    }
086}