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 java.io.Serializable;
24 import java.math.BigInteger;
25
26 import org.apache.directory.api.i18n.I18n;
27 import org.apache.directory.api.ldap.model.entry.Value;
28 import org.apache.directory.api.ldap.model.exception.LdapException;
29 import org.apache.directory.api.ldap.model.schema.LdapComparator;
30 import org.apache.directory.api.ldap.model.schema.normalizers.NumericNormalizer;
31 import org.slf4j.Logger;
32 import org.slf4j.LoggerFactory;
33
34
35 /**
36 * A class for the integerOrderingMatch matchingRule (RFC 4517, par. 4.2.20)
37 *
38 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
39 */
40 public class IntegerComparator extends LdapComparator<Object> implements Serializable
41 {
42 /** The serial version UID */
43 private static final long serialVersionUID = 2L;
44
45 /** A logger for this class */
46 private static final Logger LOG = LoggerFactory.getLogger( IntegerComparator.class );
47
48
49 /**
50 * The IntegerComparator constructor. Its OID is the IntegerOrderingMatch matching
51 * rule OID.
52 *
53 * @param oid The Comparator's OID
54 */
55 public IntegerComparator( String oid )
56 {
57 super( oid );
58 }
59
60
61 /**
62 * {@inheritDoc}
63 */
64 @Override
65 public int compare( Object v1, Object v2 )
66 {
67 // The value can be a String, a Value or a Long
68 if ( v1 == null )
69 {
70 if ( v2 == null )
71 {
72 return 0;
73 }
74 else
75 {
76 return -1;
77 }
78 }
79 else if ( v2 == null )
80 {
81 return 1;
82 }
83
84 if ( v1 instanceof String )
85 {
86 return compare( ( String ) v1, ( String ) v2 );
87 }
88 else if ( v1 instanceof Value )
89 {
90 return compare( ( ( Value ) v1 ).getString(), ( ( Value ) v2 ).getString() );
91 }
92 else
93 {
94 return Long.compare( ( Long ) v1, ( Long ) v2 );
95 }
96 }
97
98
99 /**
100 * Implementation of the Compare method
101 *
102 * @param backendValue The stored value
103 * @param assertValue The provided value
104 * @return <tt>0</tt> if the values are equal, <tt>-1</tt> if the provided value is below
105 * the stored value, <tt>+1</tt> otherwise
106 */
107 private int compare( String backendValue, String assertValue )
108 {
109 if ( LOG.isDebugEnabled() )
110 {
111 LOG.debug( I18n.msg( I18n.MSG_13746_COMPARING_INTEGER, backendValue, assertValue ) );
112 }
113
114 // First, shortcut the process by comparing
115 // references. If they are equals, then o1 and o2
116 // reference the same object
117 if ( backendValue == assertValue )
118 {
119 return 0;
120 }
121
122 // Then, deal with one of o1 or o2 being null
123 // Both can't be null, because then they would
124 // have been caught by the previous test
125 if ( ( backendValue == null ) || ( assertValue == null ) )
126 {
127 return backendValue == null ? -1 : 1;
128 }
129
130 // Both objects must be stored as String for numeric.
131 // But we need to normalize the values first.
132 NumericNormalizer normalizer = new NumericNormalizer();
133
134 try
135 {
136 backendValue = normalizer.normalize( backendValue );
137 }
138 catch ( LdapException le )
139 {
140 throw new IllegalArgumentException( I18n.err( I18n.ERR_13724_INVALID_VALUE, backendValue ), le );
141 }
142 try
143 {
144 assertValue = normalizer.normalize( assertValue );
145 }
146 catch ( LdapException le )
147 {
148 throw new IllegalArgumentException( I18n.err( I18n.ERR_13724_INVALID_VALUE, assertValue ), le );
149 }
150
151 try
152 {
153 // First try with longs
154 Long l1 = Long.valueOf( backendValue );
155 Long l2 = Long.valueOf( assertValue );
156
157 return l1.compareTo( l2 );
158 }
159 catch ( NumberFormatException nfe )
160 {
161 // Ok, try with BigIntegers
162 BigInteger b1 = new BigInteger( backendValue );
163 BigInteger b2 = new BigInteger( assertValue );
164
165 return b1.compareTo( b2 );
166 }
167 }
168 }