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.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 the objectIdentifierMatch matchingRule. 031 * 032 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 033 */ 034public class ObjectIdentifierComparator extends LdapComparator<Object> 035{ 036 /** The serial version UID */ 037 private static final long serialVersionUID = 2L; 038 039 /** A logger for this class */ 040 private static final Logger LOG = LoggerFactory.getLogger( ObjectIdentifierComparator.class ); 041 042 043 /** 044 * The ObjectIdentifierComparator constructor. Its OID is the ObjectIdentifierMatch matching 045 * rule OID. 046 * 047 * @param oid The Comparator's OID 048 */ 049 public ObjectIdentifierComparator( String oid ) 050 { 051 super( oid ); 052 } 053 054 055 /** 056 * {@inheritDoc} 057 */ 058 @Override 059 public int compare( Object o1, Object o2 ) 060 { 061 if ( LOG.isDebugEnabled() ) 062 { 063 LOG.debug( I18n.msg( I18n.MSG_13747_COMPARING_OBJECT_IDENTIFIER, o1, o2 ) ); 064 } 065 066 // ------------------------------------------------------------------- 067 // Handle some basis cases 068 // ------------------------------------------------------------------- 069 if ( o1 == null ) 070 { 071 return ( o2 == null ) ? 0 : -1; 072 } 073 else if ( o2 == null ) 074 { 075 return 1; 076 } 077 078 if ( o1.equals( o2 ) ) 079 { 080 return 0; 081 } 082 083 if ( !( o1 instanceof String && o2 instanceof String ) ) 084 { 085 return -1; 086 } 087 088 // Here, we should leverage the SchemaManager to compare the String and the OID 089 return ( ( String ) o1 ).compareToIgnoreCase( ( String ) o2 ); 090 } 091}