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.api.ldap.model.schema.comparators; 021 022 023import java.io.IOException; 024import java.io.Serializable; 025import java.math.BigInteger; 026 027import org.apache.directory.api.i18n.I18n; 028import org.apache.directory.api.ldap.model.schema.LdapComparator; 029import org.apache.directory.api.ldap.model.schema.PrepareString; 030import org.slf4j.Logger; 031import org.slf4j.LoggerFactory; 032 033 034/** 035 * A class for the integerOrderingMatch matchingRule (RFC 4517, par. 4.2.20) 036 * 037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 038 */ 039public class IntegerComparator extends LdapComparator<Object> implements Serializable 040{ 041 /** The serial version UID */ 042 private static final long serialVersionUID = 2L; 043 044 /** A logger for this class */ 045 private static final Logger LOG = LoggerFactory.getLogger( IntegerComparator.class ); 046 047 048 /** 049 * The IntegerComparator constructor. Its OID is the IntegerOrderingMatch matching 050 * rule OID. 051 */ 052 public IntegerComparator( String oid ) 053 { 054 super( oid ); 055 } 056 057 058 /** 059 * Implementation of the Compare method 060 */ 061 public int compare( Object v1, Object v2 ) 062 { 063 if ( v1 instanceof String ) 064 { 065 return compare( ( String ) v1, ( String ) v2 ); 066 } 067 else 068 { 069 return compare( ( Long ) v1, ( Long ) v2 ); 070 } 071 } 072 073 074 /** 075 * Implementation of the Compare method 076 */ 077 @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "RC_REF_COMPARISON", 078 justification = "false positive") 079 private int compare( Long backendValue, Long assertValue ) 080 { 081 LOG.debug( "comparing Integer objects '{}' with '{}'", backendValue, assertValue ); 082 083 // First, shortcut the process by comparing 084 // references. If they are equals, then o1 and o2 085 // reference the same object 086 if ( backendValue == assertValue ) 087 { 088 return 0; 089 } 090 091 // Then, deal with one of o1 or o2 being null 092 // Both can't be null, because then they would 093 // have been caught by the previous test 094 if ( ( backendValue == null ) || ( assertValue == null ) ) 095 { 096 return ( backendValue == null ? -1 : 1 ); 097 } 098 099 return backendValue.compareTo( assertValue ); 100 } 101 102 103 /** 104 * Implementation of the Compare method 105 */ 106 @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "ES_COMPARING_PARAMETER_STRING_WITH_EQ", 107 justification = "false positive") 108 private int compare( String backendValue, String assertValue ) 109 { 110 LOG.debug( "comparing Integer objects '{}' with '{}'", backendValue, assertValue ); 111 112 // First, shortcut the process by comparing 113 // references. If they are equals, then o1 and o2 114 // reference the same object 115 if ( backendValue == assertValue ) 116 { 117 return 0; 118 } 119 120 // Then, deal with one of o1 or o2 being null 121 // Both can't be null, because then they would 122 // have been caught by the previous test 123 if ( ( backendValue == null ) || ( assertValue == null ) ) 124 { 125 return ( backendValue == null ? -1 : 1 ); 126 } 127 128 // Both objects must be stored as String for numeric. 129 // But we need to normalize the values first. 130 try 131 { 132 backendValue = PrepareString.normalize( backendValue, PrepareString.StringType.NUMERIC_STRING ); 133 } 134 catch ( IOException e ) 135 { 136 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, backendValue ) ); 137 } 138 try 139 { 140 assertValue = PrepareString.normalize( assertValue, PrepareString.StringType.NUMERIC_STRING ); 141 } 142 catch ( IOException e ) 143 { 144 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, assertValue ) ); 145 } 146 147 BigInteger b1 = new BigInteger( backendValue ); 148 BigInteger b2 = new BigInteger( assertValue ); 149 150 return b1.compareTo( b2 ); 151 } 152}