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 org.apache.directory.api.ldap.model.schema.LdapComparator;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
26
27
28 /**
29 * A class for the BooleanComparator matchingRule (RFC 4517, par. 4.2.2)
30 *
31 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
32 */
33 public class BooleanComparator extends LdapComparator<String>
34 {
35 /** The serial version UID */
36 private static final long serialVersionUID = 2L;
37
38 /** A logger for this class */
39 private static final Logger LOG = LoggerFactory.getLogger( BooleanComparator.class );
40
41
42 /**
43 * The BooleanComparator constructor. Its OID is the BooleanMatch matching
44 * rule OID.
45 */
46 public BooleanComparator( String oid )
47 {
48 super( oid );
49 }
50
51
52 /**
53 * Implementation of the Compare method
54 */
55 public int compare( String b1, String b2 )
56 {
57 LOG.debug( "comparing boolean objects '{}' with '{}'", b1, b2 );
58
59 // First, shortcut the process by comparing
60 // references. If they are equals, then o1 and o2
61 // reference the same object
62 if ( b1 == b2 )
63 {
64 return 0;
65 }
66
67 // Then, deal with one of o1 or o2 being null
68 // Both can't be null, because then they would
69 // have been catched by the previous test
70 if ( ( b1 == null ) || ( b2 == null ) )
71 {
72 return ( b1 == null ? -1 : 1 );
73 }
74
75 // The boolean should have been stored as 'TRUE' or 'FALSE'
76 // into the server, and the compare method will be called
77 // with normalized booleans, so no need to upper case them.
78 // We don't need to check the assertion value, because we
79 // are dealing with booleans.
80 boolean boolean1 = Boolean.valueOf( b1 );
81 boolean boolean2 = Boolean.valueOf( b2 );
82
83 if ( boolean1 == boolean2 )
84 {
85 return 0;
86 }
87
88 return ( boolean1 ? 1 : -1 );
89 }
90 }