001    /*
002    // $Id: DimensionType.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    import org.olap4j.metadata.*;
023    
024    /**
025     * The type of an expression which represents a Dimension.
026     *
027     * @author jhyde
028     * @since Feb 17, 2005
029     * @version $Id: DimensionType.java 482 2012-01-05 23:27:27Z jhyde $
030     */
031    public class DimensionType implements Type {
032        private final Dimension dimension;
033        private final String digest;
034    
035        public static final DimensionType Unknown = new DimensionType(null);
036    
037        /**
038         * Creates a type representing a dimension.
039         *
040         * @param dimension Dimension which values of this type must belong to, or
041         *   null if not known
042         */
043        public DimensionType(Dimension dimension) {
044            this.dimension = dimension;
045            StringBuilder buf = new StringBuilder("DimensionType<");
046            if (dimension != null) {
047                buf.append("dimension=").append(dimension.getUniqueName());
048            }
049            buf.append(">");
050            this.digest = buf.toString();
051        }
052    
053        public boolean usesDimension(Dimension dimension, boolean maybe) {
054            if (this.dimension == null) {
055                return maybe;
056            } else {
057                return this.dimension.equals(dimension);
058            }
059        }
060    
061        public Hierarchy getHierarchy() {
062            return dimension == null
063                ? null
064                : dimension.getHierarchies().size() > 1
065                ? null
066                : dimension.getHierarchies().get(0);
067        }
068    
069        public Level getLevel() {
070            return null;
071        }
072    
073        public Dimension getDimension() {
074            return dimension;
075        }
076    
077        public String toString() {
078            return digest;
079        }
080    }
081    
082    // End DimensionType.java