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 org.apache.directory.shared.i18n.I18n; 024import org.apache.directory.shared.ldap.model.exception.LdapException; 025import org.apache.directory.shared.ldap.model.exception.LdapInvalidDnException; 026import org.apache.directory.shared.ldap.model.name.Dn; 027import org.apache.directory.shared.ldap.model.schema.LdapComparator; 028import org.apache.directory.shared.ldap.model.schema.SchemaManager; 029 030 031/** 032 * Compare two DNs 033 * 034 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 035 */ 036public class DnComparator extends LdapComparator<Object> 037{ 038 /** The serial version UID */ 039 private static final long serialVersionUID = 2L; 040 041 /** A reference to the schema manager */ 042 private SchemaManager schemaManager; 043 044 public DnComparator( String oid ) 045 { 046 super( oid ); 047 } 048 049 050 /** 051 * {@inheritDoc} 052 */ 053 public int compare( Object obj0, Object obj1 ) 054 { 055 Dn dn0 = null; 056 Dn dn1 = null; 057 058 try 059 { 060 dn0 = getDn( obj0 ); 061 dn1 = getDn( obj1 ); 062 } 063 catch ( LdapException e ) 064 { 065 // -- what do we do here ? 066 return -1; 067 } 068 069 if ( dn0.equals( dn1 ) ) 070 { 071 return 0; 072 } 073 else 074 { 075 return -1; 076 } 077 } 078 079 080 private Dn getDn( Object obj ) throws LdapInvalidDnException 081 { 082 Dn dn = null; 083 084 if ( obj instanceof Dn) 085 { 086 dn = (Dn)obj; 087 088 dn = ( dn.isSchemaAware() ? dn : dn.apply( schemaManager ) ); 089 } 090 else if ( obj instanceof String ) 091 { 092 dn = new Dn( schemaManager, ( String ) obj ); 093 } 094 else 095 { 096 throw new IllegalStateException( I18n.err( I18n.ERR_04218, (obj == null ? null : obj.getClass() ) ) ); 097 } 098 099 return dn; 100 } 101 102 103 /** 104 * {@inheritDoc} 105 */ 106 public void setSchemaManager( SchemaManager schemaManager ) 107 { 108 this.schemaManager = schemaManager; 109 } 110}