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.kerberos.codec.apReq.actions;
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.shared.kerberos.codec.apReq.ApReqContainer;
028import org.apache.directory.shared.kerberos.messages.ApReq;
029import org.slf4j.Logger;
030import org.slf4j.LoggerFactory;
031
032
033/**
034 * The action used to initialize the AP-REQ object
035 *
036 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037 */
038public class ApReqInit extends GrammarAction<ApReqContainer>
039{
040    /** The logger */
041    private static final Logger LOG = LoggerFactory.getLogger( ApReqInit.class );
042
043
044    /**
045     * Instantiates a new ApReqInit action.
046     */
047    public ApReqInit()
048    {
049        super( "AP-REQ initialization" );
050    }
051
052
053    /**
054     * {@inheritDoc}
055     */
056    public void action( ApReqContainer apReqContainer ) throws DecoderException
057    {
058        TLV tlv = apReqContainer.getCurrentTLV();
059
060        // The Length should not be null
061        if ( tlv.getLength() == 0 )
062        {
063            LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) );
064
065            // This will generate a PROTOCOL_ERROR
066            throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) );
067        }
068
069        // Create the AP-REQ now
070        ApReq apReq = new ApReq();
071
072        apReqContainer.setApReq( apReq );
073    }
074}