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.math.BigInteger;
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.slf4j.Logger;
030 import org.slf4j.LoggerFactory;
031
032
033 /**
034 * A class for the integerOrderingMatch matchingRule (RFC 4517, par. 4.2.20)
035 *
036 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037 * @version $Rev: 437007 $
038 */
039 public class IntegerOrderingComparator extends LdapComparator<String>
040 {
041 /** A logger for this class */
042 private static final Logger LOG = LoggerFactory.getLogger( IntegerOrderingComparator.class );
043
044 /** The serialVersionUID */
045 private static final long serialVersionUID = 1L;
046
047
048 /**
049 * The IntegerOrderingComparator constructor. Its OID is the IntegerOrderingMatch matching
050 * rule OID.
051 */
052 public IntegerOrderingComparator( String oid )
053 {
054 super( oid );
055 }
056
057
058 /**
059 * Implementation of the Compare method
060 */
061 public int compare( String backendValue, String assertValue )
062 {
063 LOG.debug( "comparing IntegerOrdering objects '{}' with '{}'", backendValue, assertValue );
064
065 // First, shortcut the process by comparing
066 // references. If they are equals, then o1 and o2
067 // reference the same object
068 if ( backendValue == assertValue )
069 {
070 return 0;
071 }
072
073 // Then, deal with one of o1 or o2 being null
074 // Both can't be null, because then they would
075 // have been caught by the previous test
076 if ( ( backendValue == null ) || ( assertValue == null ) )
077 {
078 return ( backendValue == null ? -1 : 1 );
079 }
080
081 // Both objects must be stored as String for numeric.
082 // But we need to normalize the values first.
083 try
084 {
085 backendValue = PrepareString.normalize( backendValue, PrepareString.StringType.NUMERIC_STRING );
086 }
087 catch ( IOException e )
088 {
089 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, backendValue ) );
090 }
091 try
092 {
093 assertValue = PrepareString.normalize( assertValue, PrepareString.StringType.NUMERIC_STRING );
094 }
095 catch ( IOException e )
096 {
097 throw new IllegalArgumentException( I18n.err( I18n.ERR_04224, assertValue ) );
098 }
099
100 BigInteger b1 = new BigInteger( backendValue );
101 BigInteger b2 = new BigInteger( assertValue );
102 return b1.compareTo( b2 );
103 }
104 }