001 /* 002 // $Id: LevelType.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.OlapException; 023 import org.olap4j.metadata.*; 024 025 /** 026 * The type of an expression which represents a level. 027 * 028 * @author jhyde 029 * @since Feb 17, 2005 030 * @version $Id: LevelType.java 482 2012-01-05 23:27:27Z jhyde $ 031 */ 032 public class LevelType implements Type { 033 private final Dimension dimension; 034 private final Hierarchy hierarchy; 035 private final Level level; 036 private final String digest; 037 038 /** 039 * Creates a type representing a level. 040 * 041 * @param dimension Dimension which values of this type must belong to, or 042 * null if not known 043 * 044 * @param hierarchy Hierarchy which values of this type must belong to, or 045 * null if not known 046 * 047 * @param level Level which values of this type must belong to, or null if 048 * not known 049 */ 050 public LevelType( 051 Dimension dimension, 052 Hierarchy hierarchy, 053 Level level) 054 { 055 this.dimension = dimension; 056 this.hierarchy = hierarchy; 057 this.level = level; 058 if (level != null) { 059 assert hierarchy != null : "hierarchy != null"; 060 assert level.getHierarchy() == hierarchy 061 : "level.getHierarchy() == hierarchy"; 062 } 063 if (hierarchy != null) { 064 assert dimension != null : "dimension != null"; 065 assert hierarchy.getDimension() == dimension 066 : "hierarchy.getDimension() == dimension"; 067 } 068 StringBuilder buf = new StringBuilder("LevelType<"); 069 if (level != null) { 070 buf.append("level=").append(level.getUniqueName()); 071 } else if (hierarchy != null) { 072 buf.append("hierarchy=").append(hierarchy.getUniqueName()); 073 } else if (dimension != null) { 074 buf.append("dimension=").append(dimension.getUniqueName()); 075 } 076 buf.append(">"); 077 this.digest = buf.toString(); 078 } 079 080 // not part of public olap4j API 081 private static LevelType forType(Type type) throws OlapException { 082 return new LevelType( 083 type.getDimension(), 084 type.getHierarchy(), 085 type.getLevel()); 086 } 087 088 public boolean usesDimension(Dimension dimension, boolean maybe) { 089 if (this.dimension == null) { 090 return maybe; 091 } else { 092 return this.dimension.equals(dimension); 093 } 094 } 095 096 public Dimension getDimension() { 097 return dimension; 098 } 099 100 public Hierarchy getHierarchy() { 101 return hierarchy; 102 } 103 104 public Level getLevel() { 105 return level; 106 } 107 108 public String toString() { 109 return digest; 110 } 111 } 112 113 // End LevelType.java 114