| /* |
| * 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 java.util.UUID; |
| |
| import org.apache.directory.api.i18n.I18n; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * A comparator for UUID. We simply use the UUID compareTo method. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class UuidComparator extends SerializableComparator<String> |
| { |
| /** The serial version UID */ |
| private static final long serialVersionUID = 2L; |
| |
| /** A logger for this class */ |
| private static final Logger LOG = LoggerFactory.getLogger( UuidComparator.class ); |
| |
| /** A static instance of the UuidComparator */ |
| public static final UuidComparator INSTANCE = new UuidComparator( "1.3.6.1.1.16.4" ); |
| |
| |
| /** |
| * The UUIDComparator constructor. Its OID is the UUIDMatch matching |
| * rule OID. |
| * |
| * @param oid The Comparator's OID |
| */ |
| public UuidComparator( String oid ) |
| { |
| super( oid ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public int compare( String uuid1, String uuid2 ) |
| { |
| if ( LOG.isDebugEnabled() ) |
| { |
| LOG.debug( I18n.msg( I18n.MSG_13751_COMPARING_UUID, uuid1, uuid2 ) ); |
| } |
| |
| // ------------------------------------------------------------------- |
| // Handle some basis cases |
| // ------------------------------------------------------------------- |
| if ( uuid1 == null ) |
| { |
| return -1; |
| } |
| |
| return uuid1.compareTo( uuid2 ); |
| } |
| |
| |
| /** |
| * Compare two UUID. |
| * |
| * @param uuid1 The first UUID |
| * @param uuid2 he second UUID |
| * @return -1 if the first UUID is lower than the second UUID, 1 if it's higher, 0 |
| * if they are equal |
| */ |
| public int compare( UUID uuid1, UUID uuid2 ) |
| { |
| if ( LOG.isDebugEnabled() ) |
| { |
| LOG.debug( I18n.msg( I18n.MSG_13751_COMPARING_UUID, uuid1, uuid2 ) ); |
| } |
| |
| // ------------------------------------------------------------------- |
| // Handle some basis cases |
| // ------------------------------------------------------------------- |
| if ( uuid1 == null ) |
| { |
| return ( uuid2 == null ) ? 0 : -1; |
| } |
| |
| if ( uuid2 == null ) |
| { |
| return 1; |
| } |
| |
| return uuid1.compareTo( uuid2 ); |
| } |
| } |