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 org.apache.directory.shared.i18n.I18n;
024    import org.apache.directory.shared.ldap.schema.LdapComparator;
025    
026    
027    /**
028     * Compares Long keys and values within a table.
029     * 
030     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
031     * @version $Revision: 437007 $
032     */
033    public class LongComparator extends LdapComparator<Long>
034    {
035        /**
036         * Version id for serialization.
037         */
038        static final long serialVersionUID = 1L;
039        
040        /**
041         * The LongComparator constructor. Its OID is the IntegerOrderingMatch matching
042         * rule OID.
043         */
044        public LongComparator( String oid )
045        {
046            super( oid );
047        }
048    
049    
050        /**
051         * Compare two objects.
052         * 
053         * @param obj1 First object
054         * @param obj2 Second object
055         * @return 1 if obj1 > obj2, 0 if obj1 == obj2, -1 if obj1 < obj2
056         */
057        public int compare( Long obj1, Long obj2 )
058        {
059            try
060            {
061                return obj1.compareTo( obj2 );
062            }
063            catch ( NullPointerException npe )
064            {
065                if ( obj1 == null )
066                {
067                    throw new IllegalArgumentException( I18n.err( I18n.ERR_04219 ) );
068                }
069                else
070                {
071                    throw new IllegalArgumentException( I18n.err( I18n.ERR_04220 ));
072                }
073            }
074        }
075    }