001    /*
002    // $Id: NullType.java 482 2012-01-05 23:27:27Z jhyde $
003    //
004    // Licensed to Julian Hyde under one or more contributor license
005    // agreements. See the NOTICE file distributed with this work for
006    // additional information regarding copyright ownership.
007    //
008    // Julian Hyde licenses this file to you under the Apache License,
009    // Version 2.0 (the "License"); you may not use this file except in
010    // compliance with the License. You may obtain a copy of the License at:
011    //
012    // http://www.apache.org/licenses/LICENSE-2.0
013    //
014    // Unless required by applicable law or agreed to in writing, software
015    // distributed under the License is distributed on an "AS IS" BASIS,
016    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017    // See the License for the specific language governing permissions and
018    // limitations under the License.
019    */
020    package org.olap4j.type;
021    
022    /**
023     * The type of a null expression.
024     *
025     * @author medstat
026     * @version $Id: NullType.java 482 2012-01-05 23:27:27Z jhyde $
027     * @since Aug 21, 2006
028     */
029    public class NullType extends ScalarType
030    {
031        /**
032         * Creates a null type.
033         */
034        public NullType() {
035        }
036    
037        public String toString() {
038            return "NULL";
039        }
040    }
041    // End NullType.java