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
025 import org.apache.directory.shared.i18n.I18n;
026 import org.apache.directory.shared.ldap.schema.LdapComparator;
027 import org.apache.directory.shared.ldap.schema.PrepareString;
028 import org.slf4j.Logger;
029 import org.slf4j.LoggerFactory;
030
031
032 /**
033 * A class for the numericStringOrderingMatch matchingRule (RFC 4517, par. 4.2.23)
034 *
035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
036 * @version $Rev: 437007 $
037 */
038 public class NumericStringComparator extends LdapComparator<String>
039 {
040 /** A logger for this class */
041 private static final Logger LOG = LoggerFactory.getLogger( NumericStringComparator.class );
042
043 /** The serialVersionUID */
044 private static final long serialVersionUID = 1L;
045
046
047 /**
048 * The IntegerOrderingComparator constructor. Its OID is the numericStringOrderingMatch matching
049 * rule OID.
050 */
051 public NumericStringComparator( String oid )
052 {
053 super( oid );
054 }
055
056
057 /**
058 * Implementation of the Compare method
059 */
060 public int compare( String backendValue, String assertValue )
061 {
062 LOG.debug( "comparing numericStringOrdering objects '{}' with '{}'", backendValue, assertValue );
063
064 // First, shortcut the process by comparing
065 // references. If they are equals, then o1 and o2
066 // reference the same object
067 if ( backendValue == assertValue )
068 {
069 return 0;
070 }
071
072 // Then, deal with one of o1 or o2 being null
073 // Both can't be null, because then they would
074 // have been caught by the previous test
075 if ( ( backendValue == null ) || ( assertValue == null ) )
076 {
077 return ( backendValue == null ? -1 : 1 );
078 }
079
080 // Both objects must be stored as String for numeric.
081 // But we need to normalize the values first.
082 try
083 {
084 backendValue = PrepareString.normalize( backendValue, PrepareString.StringType.NUMERIC_STRING );
085 }
086 catch ( IOException e )
087 {
088 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, backendValue ) );
089 }
090 try
091 {
092 assertValue = PrepareString.normalize( assertValue, PrepareString.StringType.NUMERIC_STRING );
093 }
094 catch ( IOException e )
095 {
096 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, assertValue ) );
097 }
098
099 return backendValue.compareTo( assertValue );
100 }
101 }