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