001    /*
002    // $Id: //open/mondrian/src/main/mondrian/olap/type/NullType.java#3 $
003    // This software is subject to the terms of the Common Public License
004    // Agreement, available at the following URL:
005    // http://www.opensource.org/licenses/cpl.html.
006    // Copyright (C) 2005-2008 Julian Hyde
007    // All Rights Reserved.
008    // You must accept the terms of that agreement to use this software.
009    */
010    package mondrian.olap.type;
011    
012    /**
013     * The type of a null expression.
014     *
015     * @author medstat
016     * @version $Id: //open/mondrian/src/main/mondrian/olap/type/NullType.java#3 $
017     * @since Aug 21, 2006
018     */
019    public class NullType extends ScalarType
020    {
021        /**
022         * Creates a null type.
023         */
024        public NullType()
025        {
026            super("<NULLTYPE>");
027        }
028    
029        public boolean equals(Object obj) {
030            return obj instanceof NullType;
031        }
032    }
033    
034    // End NullType.java