/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.directory.shared.kerberos.codec.transitedEncoding;
import org.apache.directory.shared.asn1.actions.CheckNotNullLength;
import org.apache.directory.shared.asn1.ber.grammar.AbstractGrammar;
import org.apache.directory.shared.asn1.ber.grammar.Grammar;
import org.apache.directory.shared.asn1.ber.grammar.GrammarTransition;
import org.apache.directory.shared.asn1.ber.tlv.UniversalTag;
import org.apache.directory.shared.kerberos.KerberosConstants;
import org.apache.directory.shared.kerberos.codec.transitedEncoding.actions.StoreContents;
import org.apache.directory.shared.kerberos.codec.transitedEncoding.actions.StoreTrType;
import org.apache.directory.shared.kerberos.codec.transitedEncoding.actions.TransitedEncodingInit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class implements the TransitedEncoding structure. All the actions are declared
* in this class. As it is a singleton, these declaration are only done once. If
* an action is to be added or modified, this is where the work is to be done !
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public final class TransitedEncodingGrammar extends AbstractGrammar<TransitedEncodingContainer>
{
/** The logger */
static final Logger LOG = LoggerFactory.getLogger( TransitedEncodingGrammar.class );
/** A speedup for logger */
static final boolean IS_DEBUG = LOG.isDebugEnabled();
/** The instance of grammar. TransitedEncodingGrammar is a singleton */
private static Grammar<TransitedEncodingContainer> instance = new TransitedEncodingGrammar();
/**
* Creates a new TransitedEncodingGrammar object.
*/
@SuppressWarnings("unchecked")
private TransitedEncodingGrammar()
{
setName( TransitedEncodingGrammar.class.getName() );
// Create the transitions table
super.transitions = new GrammarTransition[TransitedEncodingStatesEnum.LAST_TRANSITED_ENCODING_STATE.ordinal()][256];
// ============================================================================================
// TransitedEncoding
// ============================================================================================
// --------------------------------------------------------------------------------------------
// Transition from TransitedEncoding init to TransitedEncoding SEQ
// --------------------------------------------------------------------------------------------
// TransitedEncoding ::= SEQUENCE {
super.transitions[TransitedEncodingStatesEnum.START_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] =
new GrammarTransition<TransitedEncodingContainer>(
TransitedEncodingStatesEnum.START_STATE,
TransitedEncodingStatesEnum.TRANSITED_ENCODING_SEQ_STATE,
UniversalTag.SEQUENCE,
new TransitedEncodingInit() );
// --------------------------------------------------------------------------------------------
// Transition from TransitedEncoding SEQ to tr-type tag
// --------------------------------------------------------------------------------------------
// TransitedEncoding ::= SEQUENCE {
// tr-type [0]
super.transitions[TransitedEncodingStatesEnum.TRANSITED_ENCODING_SEQ_STATE.ordinal()][KerberosConstants.TRANSITED_ENCODING_TR_TYPE_TAG] =
new GrammarTransition<TransitedEncodingContainer>(
TransitedEncodingStatesEnum.TRANSITED_ENCODING_SEQ_STATE,
TransitedEncodingStatesEnum.TRANSITED_ENCODING_TR_TYPE_TAG_STATE,
KerberosConstants.TRANSITED_ENCODING_TR_TYPE_TAG,
new CheckNotNullLength<TransitedEncodingContainer>() );
// --------------------------------------------------------------------------------------------
// Transition from tr-type tag to tr-type value
// --------------------------------------------------------------------------------------------
// TransitedEncoding ::= SEQUENCE {
// tr-type [0] Int32 -- must be registered --,
super.transitions[TransitedEncodingStatesEnum.TRANSITED_ENCODING_TR_TYPE_TAG_STATE.ordinal()][UniversalTag.INTEGER
.getValue()] =
new GrammarTransition<TransitedEncodingContainer>(
TransitedEncodingStatesEnum.TRANSITED_ENCODING_TR_TYPE_TAG_STATE,
TransitedEncodingStatesEnum.TRANSITED_ENCODING_TR_TYPE_STATE,
UniversalTag.INTEGER,
new StoreTrType() );
// --------------------------------------------------------------------------------------------
// Transition from tr-type value to contents tag
// --------------------------------------------------------------------------------------------
// TransitedEncoding ::= SEQUENCE {
// ...
// contents [1]
super.transitions[TransitedEncodingStatesEnum.TRANSITED_ENCODING_TR_TYPE_STATE.ordinal()][KerberosConstants.TRANSITED_ENCODING_CONTENTS_TAG] =
new GrammarTransition<TransitedEncodingContainer>(
TransitedEncodingStatesEnum.TRANSITED_ENCODING_TR_TYPE_STATE,
TransitedEncodingStatesEnum.TRANSITED_ENCODING_CONTENTS_TAG_STATE,
KerberosConstants.TRANSITED_ENCODING_CONTENTS_TAG,
new CheckNotNullLength<TransitedEncodingContainer>() );
// --------------------------------------------------------------------------------------------
// Transition from contents tag to contents value
// --------------------------------------------------------------------------------------------
// TransitedEncoding ::= SEQUENCE {
// ...
// contents [1] OCTET STRING
super.transitions[TransitedEncodingStatesEnum.TRANSITED_ENCODING_CONTENTS_TAG_STATE.ordinal()][UniversalTag.OCTET_STRING
.getValue()] =
new GrammarTransition<TransitedEncodingContainer>(
TransitedEncodingStatesEnum.TRANSITED_ENCODING_CONTENTS_TAG_STATE,
TransitedEncodingStatesEnum.TRANSITED_ENCODING_CONTENTS_STATE,
UniversalTag.OCTET_STRING,
new StoreContents() );
}
/**
* Get the instance of this grammar
*
* @return An instance on the TransitedEncoding Grammar
*/
public static Grammar<TransitedEncodingContainer> getInstance()
{
return instance;
}
}