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 */
020 package org.apache.directory.shared.ldap.schema.comparators;
021
022
023 import javax.naming.Name;
024 import javax.naming.NamingException;
025
026 import org.apache.directory.shared.i18n.I18n;
027 import org.apache.directory.shared.ldap.name.DN;
028 import org.apache.directory.shared.ldap.schema.LdapComparator;
029 import org.apache.directory.shared.ldap.schema.SchemaManager;
030
031
032 /**
033 *
034 *
035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
036 * @version $Rev$
037 */
038 public class DnComparator extends LdapComparator<Object>
039 {
040 /** A reference to the schema manager */
041 private transient SchemaManager schemaManager;
042
043 public DnComparator( String oid )
044 {
045 super( oid );
046 }
047
048
049 /**
050 * {@inheritDoc}
051 */
052 public int compare( Object obj0, Object obj1 )
053 {
054 DN dn0 = null;
055 DN dn1 = null;
056
057 try
058 {
059 dn0 = getDn( obj0 );
060 dn1 = getDn( obj1 );
061 }
062 catch ( NamingException e )
063 {
064 // -- what do we do here ?
065 return -1;
066 }
067
068 return dn0.compareTo( dn1 );
069 }
070
071
072 public DN getDn( Object obj ) throws NamingException
073 {
074 DN dn = null;
075
076 if ( obj instanceof DN )
077 {
078 dn = (DN)obj;
079
080 dn = ( dn.isNormalized() ? dn : DN.normalize( dn, schemaManager.getNormalizerMapping() ) );
081 }
082 else if ( obj instanceof Name )
083 {
084 dn = new DN( ( Name ) obj );
085 dn.normalize( schemaManager.getNormalizerMapping() );
086 }
087 else if ( obj instanceof String )
088 {
089 dn = new DN( ( String ) obj );
090 dn.normalize( schemaManager.getNormalizerMapping() );
091 }
092 else
093 {
094 throw new IllegalStateException( I18n.err( I18n.ERR_04218, (obj == null ? null : obj.getClass() ) ) );
095 }
096
097 return dn;
098 }
099
100
101 /**
102 * {@inheritDoc}
103 */
104 public void setSchemaManager( SchemaManager schemaManager )
105 {
106 this.schemaManager = schemaManager;
107 }
108 }