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 * https://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 org.apache.directory.api.i18n.I18n; 024import org.apache.directory.api.ldap.model.schema.LdapComparator; 025import org.slf4j.Logger; 026import org.slf4j.LoggerFactory; 027 028 029/** 030 * A comparator for CSN SID. 031 * 032 * The SID is supposed to be an hexadecimal number between 0x0 and 0xfff 033 * 034 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 035 */ 036public class CsnSidComparator extends LdapComparator<String> 037{ 038 /** The serial version UID */ 039 private static final long serialVersionUID = 2L; 040 041 /** A logger for this class */ 042 private static final Logger LOG = LoggerFactory.getLogger( CsnSidComparator.class ); 043 044 045 /** 046 * The CsnSidComparator constructor. Its OID is the CsnSidMatch matching 047 * rule OID. 048 * 049 * @param oid The Comparator's OID 050 */ 051 public CsnSidComparator( String oid ) 052 { 053 super( oid ); 054 } 055 056 057 /** 058 * {@inheritDoc} 059 */ 060 public int compare( String sidStr1, String sidStr2 ) 061 { 062 if ( LOG.isDebugEnabled() ) 063 { 064 LOG.debug( I18n.msg( I18n.MSG_13744_COMPARING_CSN_SID, sidStr1, sidStr2 ) ); 065 } 066 067 // ------------------------------------------------------------------- 068 // Handle some basis cases 069 // ------------------------------------------------------------------- 070 if ( sidStr1 == null ) 071 { 072 return ( sidStr2 == null ) ? 0 : -1; 073 } 074 075 if ( sidStr2 == null ) 076 { 077 return 1; 078 } 079 080 int sid1 = 0; 081 int sid2; 082 083 try 084 { 085 sid1 = Integer.parseInt( sidStr1, 16 ); 086 } 087 catch ( NumberFormatException nfe ) 088 { 089 return -1; 090 } 091 092 try 093 { 094 sid2 = Integer.parseInt( sidStr2, 16 ); 095 } 096 catch ( NumberFormatException nfe ) 097 { 098 return 1; 099 } 100 101 if ( sid1 > sid2 ) 102 { 103 return 1; 104 } 105 else if ( sid2 > sid1 ) 106 { 107 return -1; 108 } 109 110 return 0; 111 } 112}