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; 024 025import org.apache.directory.shared.i18n.I18n; 026import org.apache.directory.shared.ldap.model.schema.LdapComparator; 027import org.apache.directory.shared.ldap.model.schema.PrepareString; 028import org.slf4j.Logger; 029import org.slf4j.LoggerFactory; 030 031 032/** 033 * A class for the numericStringOrderingMatch matchingRule (RFC 4517, par. 4.2.23) 034 * 035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 036 */ 037public class NumericStringComparator extends LdapComparator<String> 038{ 039 /** The serial version UID */ 040 private static final long serialVersionUID = 2L; 041 042 /** A logger for this class */ 043 private static final Logger LOG = LoggerFactory.getLogger( NumericStringComparator.class ); 044 045 /** 046 * The IntegerComparator constructor. Its OID is the numericStringOrderingMatch matching 047 * rule OID. 048 */ 049 public NumericStringComparator( String oid ) 050 { 051 super( oid ); 052 } 053 054 055 /** 056 * Implementation of the Compare method 057 */ 058 @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "ES_COMPARING_PARAMETER_STRING_WITH_EQ", 059 justification ="false positive") 060 public int compare( String backendValue, String assertValue ) 061 { 062 LOG.debug( "comparing numericStringOrdering objects '{}' with '{}'", backendValue, assertValue ); 063 064 // First, shortcut the process by comparing 065 // references. If they are equals, then o1 and o2 066 // reference the same object 067 if ( backendValue == assertValue ) 068 { 069 return 0; 070 } 071 072 // Then, deal with one of o1 or o2 being null 073 // Both can't be null, because then they would 074 // have been caught by the previous test 075 if ( ( backendValue == null ) || ( assertValue == null ) ) 076 { 077 return ( backendValue == null ? -1 : 1 ); 078 } 079 080 // Both objects must be stored as String for numeric. 081 // But we need to normalize the values first. 082 try 083 { 084 backendValue = PrepareString.normalize( backendValue, PrepareString.StringType.NUMERIC_STRING ); 085 } 086 catch ( IOException e ) 087 { 088 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, backendValue ) ); 089 } 090 try 091 { 092 assertValue = PrepareString.normalize( assertValue, PrepareString.StringType.NUMERIC_STRING ); 093 } 094 catch ( IOException e ) 095 { 096 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, assertValue ) ); 097 } 098 099 return backendValue.compareTo( assertValue ); 100 } 101}