| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * https://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.api.ldap.model.schema.comparators; |
| |
| |
| import org.apache.directory.api.i18n.I18n; |
| import org.apache.directory.api.ldap.model.exception.LdapException; |
| import org.apache.directory.api.ldap.model.exception.LdapInvalidDnException; |
| import org.apache.directory.api.ldap.model.name.Dn; |
| import org.apache.directory.api.ldap.model.schema.LdapComparator; |
| import org.apache.directory.api.ldap.model.schema.SchemaManager; |
| |
| |
| /** |
| * Compare two DNs |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class DnComparator extends LdapComparator<Object> |
| { |
| /** The serial version UID */ |
| private static final long serialVersionUID = 2L; |
| |
| /** A reference to the schema manager */ |
| private transient SchemaManager schemaManager; |
| |
| /** |
| * Creates a new instance of DnComparator. |
| * |
| * @param oid The Comparator's OID |
| */ |
| public DnComparator( String oid ) |
| { |
| super( oid ); |
| } |
| |
| |
| /** |
| * Compare two String DNs |
| * |
| * @param dn1 The first DN |
| * @param dn2 The second DN |
| * |
| * @return -1 i the first DN is inferior to the second DN, 1 if the second DN is superior, 0 of they are equal |
| */ |
| public int compare( String dn1, String dn2 ) |
| { |
| if ( dn1 == null ) |
| { |
| if ( dn2 == null ) |
| { |
| return 0; |
| } |
| else |
| { |
| return -1; |
| } |
| } |
| |
| return dn1.compareTo( dn2 ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public int compare( Object obj0, Object obj1 ) |
| { |
| if ( ( obj0 instanceof String ) && ( obj1 instanceof String ) ) |
| { |
| return compare( ( String ) obj0, ( String ) obj1 ); |
| } |
| |
| Dn dn0 = null; |
| Dn dn1 = null; |
| |
| try |
| { |
| dn0 = getDn( obj0 ); |
| dn1 = getDn( obj1 ); |
| } |
| catch ( LdapException e ) |
| { |
| // -- what do we do here ? |
| return -1; |
| } |
| |
| int dn0Size = dn0.getRdns().size(); |
| int dn1Size = dn1.getRdns().size(); |
| |
| // check the equality first, cause |
| // when both DNs are equal checking isAncestorOf() returns true |
| if ( dn0.equals( dn1 ) ) |
| { |
| return 0; |
| } |
| else if ( dn0Size > dn1Size ) |
| { |
| return -1; |
| } |
| else if ( dn1Size > dn0Size ) |
| { |
| return 1; |
| } |
| |
| for ( int i = dn0Size - 1; i >= 0; i-- ) |
| { |
| int comp = dn0.getRdn( i ).compareTo( dn1.getRdn( i ) ); |
| |
| if ( comp != 0 ) |
| { |
| return comp; |
| } |
| } |
| |
| return 0; |
| } |
| |
| |
| private Dn getDn( Object obj ) throws LdapInvalidDnException |
| { |
| Dn dn; |
| |
| if ( obj instanceof Dn ) |
| { |
| dn = ( Dn ) obj; |
| |
| dn = dn.isSchemaAware() ? dn : new Dn( schemaManager, dn ); |
| } |
| else if ( obj instanceof String ) |
| { |
| dn = new Dn( schemaManager, ( String ) obj ); |
| } |
| else |
| { |
| throw new IllegalStateException( I18n.err( I18n.ERR_13720_CANNOT_HANDLE_DN_COMPARISONS, obj == null ? null : obj.getClass() ) ); |
| } |
| |
| return dn; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void setSchemaManager( SchemaManager schemaManager ) |
| { |
| this.schemaManager = schemaManager; |
| } |
| } |