001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020 package org.apache.directory.shared.ldap.schema.comparators; 021 022 import org.apache.directory.shared.ldap.schema.LdapComparator; 023 import org.slf4j.Logger; 024 import org.slf4j.LoggerFactory; 025 026 027 /** 028 * A class for the BooleanComparator matchingRule (RFC 4517, par. 4.2.2) 029 * 030 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 031 * @version $Rev: 437007 $ 032 */ 033 public class BooleanComparator extends LdapComparator<String> 034 { 035 /** A logger for this class */ 036 private static final Logger LOG = LoggerFactory.getLogger( BooleanComparator.class ); 037 038 /** The serialVersionUID */ 039 private static final long serialVersionUID = 1L; 040 041 /** 042 * The BooleanComparator constructor. Its OID is the BooleanMatch matching 043 * rule OID. 044 */ 045 public BooleanComparator( String oid ) 046 { 047 super( oid ); 048 } 049 050 /** 051 * Implementation of the Compare method 052 */ 053 public int compare( String b1, String b2 ) 054 { 055 LOG.debug( "comparing boolean objects '{}' with '{}'", b1, b2 ); 056 057 // First, shortcut the process by comparing 058 // references. If they are equals, then o1 and o2 059 // reference the same object 060 if ( b1 == b2 ) 061 { 062 return 0; 063 } 064 065 // Then, deal with one of o1 or o2 being null 066 // Both can't be null, because then they would 067 // have been catched by the previous test 068 if ( ( b1 == null ) || ( b2 == null ) ) 069 { 070 return ( b1 == null ? -1 : 1 ); 071 } 072 073 // The boolean should have been stored as 'TRUE' or 'FALSE' 074 // into the server, and the compare method will be called 075 // with normalized booleans, so no need to uppercase them. 076 // We don't need to check the assertion value, because we 077 // are dealing with booleans. 078 return ( b1.equals( "TRUE" ) ? 1 : -1 ); 079 } 080 }