1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.directory.shared.kerberos.codec.adAndOr;
21
22
23 import org.apache.directory.api.asn1.actions.CheckNotNullLength;
24 import org.apache.directory.api.asn1.ber.grammar.AbstractGrammar;
25 import org.apache.directory.api.asn1.ber.grammar.Grammar;
26 import org.apache.directory.api.asn1.ber.grammar.GrammarTransition;
27 import org.apache.directory.api.asn1.ber.tlv.UniversalTag;
28 import org.apache.directory.shared.kerberos.KerberosConstants;
29 import org.apache.directory.shared.kerberos.codec.adAndOr.actions.AdAndOrInit;
30 import org.apache.directory.shared.kerberos.codec.adAndOr.actions.StoreConditionCount;
31 import org.apache.directory.shared.kerberos.codec.adAndOr.actions.StoreElements;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
34
35
36 /**
37 * This class implements the AdAndOr structure. All the actions are declared
38 * in this class. As it is a singleton, these declaration are only done once. If
39 * an action is to be added or modified, this is where the work is to be done !
40 *
41 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
42 */
43 public final class AdAndOrGrammar extends AbstractGrammar<AdAndOrContainer>
44 {
45 /** The logger */
46 static final Logger LOG = LoggerFactory.getLogger( AdAndOrGrammar.class );
47
48 /** A speedup for logger */
49 static final boolean IS_DEBUG = LOG.isDebugEnabled();
50
51 /** The instance of grammar. AdAndOrGrammar is a singleton */
52 private static Grammar<AdAndOrContainer> instance = new AdAndOrGrammar();
53
54
55 /**
56 * Creates a new AdAndOrGrammar object.
57 */
58 @SuppressWarnings("unchecked")
59 private AdAndOrGrammar()
60 {
61 setName( AdAndOrGrammar.class.getName() );
62
63 // Create the transitions table
64 super.transitions = new GrammarTransition[AdAndOrStatesEnum.LAST_AD_AND_OR_STATE.ordinal()][256];
65
66 // ============================================================================================
67 // AdAndOr
68 // ============================================================================================
69 // --------------------------------------------------------------------------------------------
70 // Transition from AdAndOr init to AdAndOr SEQ
71 // --------------------------------------------------------------------------------------------
72 // AD-AND-OR ::= SEQUENCE {
73 super.transitions[AdAndOrStatesEnum.START_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] =
74 new GrammarTransition<AdAndOrContainer>(
75 AdAndOrStatesEnum.START_STATE,
76 AdAndOrStatesEnum.AD_AND_OR_STATE,
77 UniversalTag.SEQUENCE,
78 new AdAndOrInit() );
79
80 // --------------------------------------------------------------------------------------------
81 // Transition from AdAndOr SEQ to condition-count tag
82 // --------------------------------------------------------------------------------------------
83 // AD-AND-OR ::= SEQUENCE {
84 // condition-count [0]
85 super.transitions[AdAndOrStatesEnum.AD_AND_OR_STATE.ordinal()][KerberosConstants.AD_AND_OR_CONDITION_COUNT_TAG] =
86 new GrammarTransition<AdAndOrContainer>(
87 AdAndOrStatesEnum.AD_AND_OR_STATE,
88 AdAndOrStatesEnum.AD_AND_OR_CONDITION_COUNT_TAG_STATE,
89 KerberosConstants.AD_AND_OR_CONDITION_COUNT_TAG,
90 new CheckNotNullLength<AdAndOrContainer>() );
91
92 // --------------------------------------------------------------------------------------------
93 // Transition from condition-count tag to condition-count value
94 // --------------------------------------------------------------------------------------------
95 // AD-AND-OR ::= SEQUENCE {
96 // condition-count [0] Int32,
97 super.transitions[AdAndOrStatesEnum.AD_AND_OR_CONDITION_COUNT_TAG_STATE.ordinal()][UniversalTag.INTEGER
98 .getValue()] =
99 new GrammarTransition<AdAndOrContainer>(
100 AdAndOrStatesEnum.AD_AND_OR_CONDITION_COUNT_TAG_STATE,
101 AdAndOrStatesEnum.AD_AND_OR_CONDITION_COUNT_STATE,
102 UniversalTag.INTEGER,
103 new StoreConditionCount() );
104
105 // --------------------------------------------------------------------------------------------
106 // Transition from condition-countvalue to elements
107 // --------------------------------------------------------------------------------------------
108 // AD-AND-OR ::= SEQUENCE {
109 // ...
110 // elements [1] AuthorizationData
111 // }
112 super.transitions[AdAndOrStatesEnum.AD_AND_OR_CONDITION_COUNT_STATE.ordinal()][KerberosConstants.AD_AND_OR_ELEMENTS_TAG] =
113 new GrammarTransition<AdAndOrContainer>(
114 AdAndOrStatesEnum.AD_AND_OR_CONDITION_COUNT_STATE,
115 AdAndOrStatesEnum.AD_AND_OR_ELEMENTS_TAG_STATE,
116 KerberosConstants.AD_AND_OR_ELEMENTS_TAG,
117 new StoreElements() );
118 }
119
120
121 /**
122 * Get the instance of this grammar
123 *
124 * @return An instance on the AD-AND-OR Grammar
125 */
126 public static Grammar<AdAndOrContainer> getInstance()
127 {
128 return instance;
129 }
130 }