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 */ 020package org.apache.directory.shared.ldap.model.schema.comparators; 021 022 023import org.apache.directory.shared.ldap.model.schema.LdapComparator; 024import org.slf4j.Logger; 025import org.slf4j.LoggerFactory; 026 027 028/** 029 * A class for the BooleanComparator matchingRule (RFC 4517, par. 4.2.2) 030 * 031 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 032 */ 033public class BooleanComparator extends LdapComparator<String> 034{ 035 /** The serial version UID */ 036 private static final long serialVersionUID = 2L; 037 038 /** A logger for this class */ 039 private static final Logger LOG = LoggerFactory.getLogger( BooleanComparator.class ); 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 /** 052 * Implementation of the Compare method 053 */ 054 public int compare( String b1, String b2 ) 055 { 056 LOG.debug( "comparing boolean objects '{}' with '{}'", b1, b2 ); 057 058 // First, shortcut the process by comparing 059 // references. If they are equals, then o1 and o2 060 // reference the same object 061 if ( b1 == b2 ) 062 { 063 return 0; 064 } 065 066 // Then, deal with one of o1 or o2 being null 067 // Both can't be null, because then they would 068 // have been catched by the previous test 069 if ( ( b1 == null ) || ( b2 == null ) ) 070 { 071 return ( b1 == null ? -1 : 1 ); 072 } 073 074 // The boolean should have been stored as 'TRUE' or 'FALSE' 075 // into the server, and the compare method will be called 076 // with normalized booleans, so no need to upper case them. 077 // We don't need to check the assertion value, because we 078 // are dealing with booleans. 079 return ( b1.equals( "TRUE" ) ? 1 : -1 ); 080 } 081}