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 java.io.IOException;
024 import java.text.ParseException;
025
026 import org.apache.directory.shared.i18n.I18n;
027 import org.apache.directory.shared.ldap.schema.LdapComparator;
028 import org.apache.directory.shared.ldap.schema.PrepareString;
029 import org.apache.directory.shared.ldap.util.GeneralizedTime;
030 import org.slf4j.Logger;
031 import org.slf4j.LoggerFactory;
032
033
034 /**
035 * A class for the generalizedTimeOrderingMatch matchingRule (RFC 4517, par. 4.2.17)
036 *
037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
038 * @version $Rev: 437007 $
039 */
040 public class GeneralizedTimeComparator extends LdapComparator<String>
041 {
042 /** A logger for this class */
043 private static final Logger LOG = LoggerFactory.getLogger( GeneralizedTimeComparator.class );
044
045 /** The serialVersionUID */
046 private static final long serialVersionUID = 1L;
047
048
049 /**
050 * The GeneralizedTimeComparator constructor. Its OID is the
051 * generalizedTimeOrderingMatch matching rule OID.
052 */
053 public GeneralizedTimeComparator( String oid )
054 {
055 super( oid );
056 }
057
058
059 /**
060 * Implementation of the Compare method
061 */
062 public int compare( String backendValue, String assertValue )
063 {
064 LOG.debug( "comparing generalizedTimeOrdering objects '{}' with '{}'", backendValue, assertValue );
065
066 // First, shortcut the process by comparing
067 // references. If they are equals, then o1 and o2
068 // reference the same object
069 if ( backendValue == assertValue )
070 {
071 return 0;
072 }
073
074 // Then, deal with one of o1 or o2 being null
075 // Both can't be null, because then they would
076 // have been caught by the previous test
077 if ( ( backendValue == null ) || ( assertValue == null ) )
078 {
079 return ( backendValue == null ? -1 : 1 );
080 }
081
082 // Both objects must be stored as String for generalized tim.
083 // But we need to normalize the values first.
084 GeneralizedTime backendTime;
085 try
086 {
087 String prepared = PrepareString.normalize( backendValue, PrepareString.StringType.DIRECTORY_STRING );
088 backendTime = new GeneralizedTime( prepared );
089 }
090 catch ( IOException ioe )
091 {
092 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, backendValue ) );
093 }
094 catch ( ParseException pe )
095 {
096 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, backendValue ) );
097 }
098
099 GeneralizedTime assertTime;
100 try
101 {
102 String prepared = PrepareString.normalize( assertValue, PrepareString.StringType.DIRECTORY_STRING );
103 assertTime = new GeneralizedTime( prepared );
104 }
105 catch ( IOException ioe )
106 {
107 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, assertValue ) );
108 }
109 catch ( ParseException pe )
110 {
111 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, assertValue ) );
112 }
113
114 return backendTime.compareTo( assertTime );
115 }
116 }