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.etypeInfo2;
021
022
023import org.apache.directory.api.asn1.actions.CheckNotNullLength;
024import org.apache.directory.api.asn1.ber.grammar.AbstractGrammar;
025import org.apache.directory.api.asn1.ber.grammar.Grammar;
026import org.apache.directory.api.asn1.ber.grammar.GrammarTransition;
027import org.apache.directory.api.asn1.ber.tlv.UniversalTag;
028import org.apache.directory.shared.kerberos.codec.etypeInfo2.actions.AddETypeInfo2Entry;
029import org.slf4j.Logger;
030import org.slf4j.LoggerFactory;
031
032
033/**
034 * This class implements the ETYPE-INFO2 structure. All the actions are declared
035 * in this class. As it is a singleton, these declaration are only done once. If
036 * an action is to be added or modified, this is where the work is to be done !
037 *
038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
039 */
040public final class ETypeInfo2Grammar extends AbstractGrammar<ETypeInfo2Container>
041{
042    /** The logger */
043    static final Logger LOG = LoggerFactory.getLogger( ETypeInfo2Grammar.class );
044
045    /** A speedup for logger */
046    static final boolean IS_DEBUG = LOG.isDebugEnabled();
047
048    /** The instance of grammar. ETypeInfo2Grammar is a singleton */
049    private static Grammar<ETypeInfo2Container> instance = new ETypeInfo2Grammar();
050
051
052    /**
053     * Creates a new ETypeInfo2Grammar object.
054     */
055    @SuppressWarnings("unchecked")
056    private ETypeInfo2Grammar()
057    {
058        setName( ETypeInfo2Grammar.class.getName() );
059
060        // Create the transitions table
061        super.transitions = new GrammarTransition[ETypeInfo2StatesEnum.LAST_ETYPE_INFO2_STATE.ordinal()][256];
062
063        // ============================================================================================
064        // ETYPE-INFO2
065        // ============================================================================================
066        // --------------------------------------------------------------------------------------------
067        // Transition from ETYPE-INFO2 init to ETYPE-INFO2 SEQ
068        // --------------------------------------------------------------------------------------------
069        // ETYPE-INFO2-ENTRY         ::= SEQUENCE
070        super.transitions[ETypeInfo2StatesEnum.START_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] =
071            new GrammarTransition<ETypeInfo2Container>(
072                ETypeInfo2StatesEnum.START_STATE,
073                ETypeInfo2StatesEnum.ETYPE_INFO2_SEQ_STATE,
074                UniversalTag.SEQUENCE,
075                new CheckNotNullLength<ETypeInfo2Container>() );
076
077        // --------------------------------------------------------------------------------------------
078        // Transition from ETYPE-INFO2 init to ETYPE-INFO2 SEQ
079        // --------------------------------------------------------------------------------------------
080        // ETYPE-INFO2-ENTRY         ::= SEQUENCE OF <ETYPE-INFO2-ENTRY>
081        //
082        super.transitions[ETypeInfo2StatesEnum.ETYPE_INFO2_SEQ_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] =
083            new GrammarTransition<ETypeInfo2Container>(
084                ETypeInfo2StatesEnum.ETYPE_INFO2_SEQ_STATE,
085                ETypeInfo2StatesEnum.ETYPE_INFO2_SEQ_STATE,
086                UniversalTag.SEQUENCE,
087                new AddETypeInfo2Entry() );
088    }
089
090
091    /**
092     * Get the instance of this grammar
093     *
094     * @return An instance on the ETYPE-INFO Grammar
095     */
096    public static Grammar<ETypeInfo2Container> getInstance()
097    {
098        return instance;
099    }
100}