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 */
020package org.apache.directory.shared.ldap.codec.actions.modifyRequest;
021
022
023import org.apache.directory.shared.asn1.ber.grammar.GrammarAction;
024import org.apache.directory.shared.asn1.ber.tlv.TLV;
025import org.apache.directory.shared.ldap.codec.api.LdapMessageContainer;
026import org.apache.directory.shared.ldap.codec.decorators.ModifyRequestDecorator;
027import org.slf4j.Logger;
028import org.slf4j.LoggerFactory;
029
030
031/**
032 * The action used to initialize the set of ModificationRequest AVAs
033 * <pre>
034 * ModifyRequest ::= [APPLICATION 6] SEQUENCE {
035 *     ...
036 *     modification SEQUENCE OF SEQUENCE {
037 *             ...
038 *         modification   AttributeTypeAndValues }
039 *
040 * AttributeTypeAndValues ::= SEQUENCE {
041 *     ...
042 *     vals SET OF AttributeValue }
043 * </pre>
044 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
045 */
046public class InitAttributeVals extends GrammarAction<LdapMessageContainer<ModifyRequestDecorator>>
047{
048    /** The logger */
049    private static final Logger LOG = LoggerFactory.getLogger( InitAttributeVals.class );
050
051    /**
052     * Instantiates a new action.
053     */
054    public InitAttributeVals()
055    {
056        super( "Init Attribute vals" );
057    }
058
059
060    /**
061     * {@inheritDoc}
062     */
063    public void action( LdapMessageContainer<ModifyRequestDecorator> container )
064    {
065        TLV tlv = container.getCurrentTLV();
066
067        // If the length is null, we store an empty value
068        if ( tlv.getLength() == 0 )
069        {
070            LOG.debug( "No vals for this attribute" );
071        }
072
073        // We can have an END transition
074        container.setGrammarEndAllowed( true );
075
076        LOG.debug( "Some vals are to be decoded" );
077    }
078}