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 * https://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.api.ldap.model.schema.comparators;
21
22
23 import org.apache.directory.api.i18n.I18n;
24 import org.apache.directory.api.ldap.model.schema.LdapComparator;
25 import org.slf4j.Logger;
26 import org.slf4j.LoggerFactory;
27
28
29 /**
30 * A comparator for CSN SID.
31 *
32 * The SID is supposed to be an hexadecimal number between 0x0 and 0xfff
33 *
34 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
35 */
36 public class CsnSidComparator extends LdapComparator<String>
37 {
38 /** The serial version UID */
39 private static final long serialVersionUID = 2L;
40
41 /** A logger for this class */
42 private static final Logger LOG = LoggerFactory.getLogger( CsnSidComparator.class );
43
44
45 /**
46 * The CsnSidComparator constructor. Its OID is the CsnSidMatch matching
47 * rule OID.
48 *
49 * @param oid The Comparator's OID
50 */
51 public CsnSidComparator( String oid )
52 {
53 super( oid );
54 }
55
56
57 /**
58 * {@inheritDoc}
59 */
60 public int compare( String sidStr1, String sidStr2 )
61 {
62 if ( LOG.isDebugEnabled() )
63 {
64 LOG.debug( I18n.msg( I18n.MSG_13744_COMPARING_CSN_SID, sidStr1, sidStr2 ) );
65 }
66
67 // -------------------------------------------------------------------
68 // Handle some basis cases
69 // -------------------------------------------------------------------
70 if ( sidStr1 == null )
71 {
72 return ( sidStr2 == null ) ? 0 : -1;
73 }
74
75 if ( sidStr2 == null )
76 {
77 return 1;
78 }
79
80 int sid1 = 0;
81 int sid2;
82
83 try
84 {
85 sid1 = Integer.parseInt( sidStr1, 16 );
86 }
87 catch ( NumberFormatException nfe )
88 {
89 return -1;
90 }
91
92 try
93 {
94 sid2 = Integer.parseInt( sidStr2, 16 );
95 }
96 catch ( NumberFormatException nfe )
97 {
98 return 1;
99 }
100
101 if ( sid1 > sid2 )
102 {
103 return 1;
104 }
105 else if ( sid2 > sid1 )
106 {
107 return -1;
108 }
109
110 return 0;
111 }
112 }