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