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.hostAddress;
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.hostAddress.actions.HostAddressInit;
30 import org.apache.directory.shared.kerberos.codec.hostAddress.actions.StoreAddrType;
31 import org.apache.directory.shared.kerberos.codec.hostAddress.actions.StoreAddress;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
34
35
36 /**
37 * This class implements the HostAddress 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 HostAddressGrammar extends AbstractGrammar<HostAddressContainer>
44 {
45 /** The logger */
46 static final Logger LOG = LoggerFactory.getLogger( HostAddressGrammar.class );
47
48 /** A speedup for logger */
49 static final boolean IS_DEBUG = LOG.isDebugEnabled();
50
51 /** The instance of grammar. HostAddressGrammar is a singleton */
52 private static Grammar<HostAddressContainer> instance = new HostAddressGrammar();
53
54
55 /**
56 * Creates a new HostAddressGrammar object.
57 */
58 @SuppressWarnings("unchecked")
59 private HostAddressGrammar()
60 {
61 setName( HostAddressGrammar.class.getName() );
62
63 // Create the transitions table
64 super.transitions = new GrammarTransition[HostAddressStatesEnum.LAST_HOST_ADDRESS_STATE.ordinal()][256];
65
66 // ============================================================================================
67 // HostAddress
68 // ============================================================================================
69 // --------------------------------------------------------------------------------------------
70 // Transition from HostAddress init to HostAddress SEQ
71 // --------------------------------------------------------------------------------------------
72 // HostAddress ::= SEQUENCE
73 super.transitions[HostAddressStatesEnum.START_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] =
74 new GrammarTransition<HostAddressContainer>(
75 HostAddressStatesEnum.START_STATE,
76 HostAddressStatesEnum.HOST_ADDRESS_SEQ_STATE,
77 UniversalTag.SEQUENCE,
78 new HostAddressInit() );
79
80 // --------------------------------------------------------------------------------------------
81 // Transition from HostAddress SEQ to addr-type tag
82 // --------------------------------------------------------------------------------------------
83 // HostAddress ::= SEQUENCE
84 // addr-type [0]
85 super.transitions[HostAddressStatesEnum.HOST_ADDRESS_SEQ_STATE.ordinal()][KerberosConstants.HOST_ADDRESS_ADDR_TYPE_TAG] =
86 new GrammarTransition<HostAddressContainer>(
87 HostAddressStatesEnum.HOST_ADDRESS_SEQ_STATE,
88 HostAddressStatesEnum.HOST_ADDRESS_ADDR_TYPE_TAG_STATE,
89 KerberosConstants.HOST_ADDRESS_ADDR_TYPE_TAG,
90 new CheckNotNullLength<HostAddressContainer>() );
91
92 // --------------------------------------------------------------------------------------------
93 // Transition from addr-type tag to addr-type value
94 // --------------------------------------------------------------------------------------------
95 // HostAddress ::= SEQUENCE
96 // addr-type [0] Int32,
97 super.transitions[HostAddressStatesEnum.HOST_ADDRESS_ADDR_TYPE_TAG_STATE.ordinal()][UniversalTag.INTEGER
98 .getValue()] =
99 new GrammarTransition<HostAddressContainer>(
100 HostAddressStatesEnum.HOST_ADDRESS_ADDR_TYPE_TAG_STATE,
101 HostAddressStatesEnum.HOST_ADDRESS_ADDR_TYPE_STATE,
102 UniversalTag.INTEGER,
103 new StoreAddrType() );
104
105 // --------------------------------------------------------------------------------------------
106 // Transition from addr-type value to address tag
107 // --------------------------------------------------------------------------------------------
108 // HostAddress ::= SEQUENCE
109 // ...
110 // address [1]
111 super.transitions[HostAddressStatesEnum.HOST_ADDRESS_ADDR_TYPE_STATE.ordinal()][KerberosConstants.HOST_ADDRESS_ADDRESS_TAG] =
112 new GrammarTransition<HostAddressContainer>(
113 HostAddressStatesEnum.HOST_ADDRESS_ADDR_TYPE_STATE,
114 HostAddressStatesEnum.HOST_ADDRESS_ADDRESS_TAG_STATE,
115 KerberosConstants.HOST_ADDRESS_ADDRESS_TAG,
116 new CheckNotNullLength<HostAddressContainer>() );
117
118 // --------------------------------------------------------------------------------------------
119 // Transition from address tag to address value
120 // --------------------------------------------------------------------------------------------
121 // HostAddress ::= SEQUENCE
122 // ...
123 // address [1] OCTET STRING
124 super.transitions[HostAddressStatesEnum.HOST_ADDRESS_ADDRESS_TAG_STATE.ordinal()][UniversalTag.OCTET_STRING
125 .ordinal()] =
126 new GrammarTransition<HostAddressContainer>(
127 HostAddressStatesEnum.HOST_ADDRESS_ADDRESS_TAG_STATE,
128 HostAddressStatesEnum.HOST_ADDRESS_ADDRESS_STATE,
129 UniversalTag.OCTET_STRING,
130 new StoreAddress() );
131 }
132
133
134 /**
135 * Get the instance of this grammar
136 *
137 * @return An instance on the HostAddress Grammar
138 */
139 public static Grammar<HostAddressContainer> getInstance()
140 {
141 return instance;
142 }
143 }