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.api.ldap.model.schema.comparators;
21
22
23 import java.io.IOException;
24 import java.io.Serializable;
25 import java.math.BigInteger;
26
27 import org.apache.directory.api.i18n.I18n;
28 import org.apache.directory.api.ldap.model.schema.LdapComparator;
29 import org.apache.directory.api.ldap.model.schema.PrepareString;
30 import org.slf4j.Logger;
31 import org.slf4j.LoggerFactory;
32
33
34 /**
35 * A class for the integerOrderingMatch matchingRule (RFC 4517, par. 4.2.20)
36 *
37 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
38 */
39 public class IntegerComparator extends LdapComparator<Object> implements Serializable
40 {
41 /** The serial version UID */
42 private static final long serialVersionUID = 2L;
43
44 /** A logger for this class */
45 private static final Logger LOG = LoggerFactory.getLogger( IntegerComparator.class );
46
47
48 /**
49 * The IntegerComparator constructor. Its OID is the IntegerOrderingMatch matching
50 * rule OID.
51 *
52 * @param oid The Comparator's OID
53 */
54 public IntegerComparator( String oid )
55 {
56 super( oid );
57 }
58
59
60 /**
61 * {@inheritDoc}
62 */
63 @Override
64 public int compare( Object v1, Object v2 )
65 {
66 if ( v1 instanceof String )
67 {
68 return compare( ( String ) v1, ( String ) v2 );
69 }
70 else
71 {
72 return compare( ( Long ) v1, ( Long ) v2 );
73 }
74 }
75
76
77 /**
78 * Implementation of the Compare method
79 */
80 private int compare( Long backendValue, Long assertValue )
81 {
82 LOG.debug( "comparing Integer objects '{}' with '{}'", backendValue, assertValue );
83
84 // First, shortcut the process by comparing
85 // references. If they are equals, then o1 and o2
86 // reference the same object
87 if ( backendValue == assertValue )
88 {
89 return 0;
90 }
91
92 // Then, deal with one of o1 or o2 being null
93 // Both can't be null, because then they would
94 // have been caught by the previous test
95 if ( ( backendValue == null ) || ( assertValue == null ) )
96 {
97 return backendValue == null ? -1 : 1;
98 }
99
100 return backendValue.compareTo( assertValue );
101 }
102
103
104 /**
105 * Implementation of the Compare method
106 */
107 private int compare( String backendValue, String assertValue )
108 {
109 LOG.debug( "comparing Integer objects '{}' with '{}'", backendValue, assertValue );
110
111 // First, shortcut the process by comparing
112 // references. If they are equals, then o1 and o2
113 // reference the same object
114 if ( backendValue == assertValue )
115 {
116 return 0;
117 }
118
119 // Then, deal with one of o1 or o2 being null
120 // Both can't be null, because then they would
121 // have been caught by the previous test
122 if ( ( backendValue == null ) || ( assertValue == null ) )
123 {
124 return backendValue == null ? -1 : 1;
125 }
126
127 // Both objects must be stored as String for numeric.
128 // But we need to normalize the values first.
129 try
130 {
131 backendValue = PrepareString.normalize( backendValue, PrepareString.StringType.NUMERIC_STRING );
132 }
133 catch ( IOException ioe )
134 {
135 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, backendValue ), ioe );
136 }
137 try
138 {
139 assertValue = PrepareString.normalize( assertValue, PrepareString.StringType.NUMERIC_STRING );
140 }
141 catch ( IOException ioe )
142 {
143 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, assertValue ), ioe );
144 }
145
146 BigInteger b1 = new BigInteger( backendValue );
147 BigInteger b2 = new BigInteger( assertValue );
148
149 return b1.compareTo( b2 );
150 }
151 }