001/* 002// $Id: PropertyValueNode.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*/ 020package org.olap4j.mdx; 021 022import org.olap4j.type.Type; 023 024/** 025 * Parse tree node representing a property-value pair. 026 * 027 * <p>Property-value pairs are used to define properties of calculated members. 028 * For example, in 029 * 030 * <blockquote> 031 * <code>WITH MEMBER [Measures].[Foo] AS ' [Measures].[Unit Sales] ',<br/> 032 * FORMAT_STRING = 'Bold',<br/> 033 * SOLVE_ORDER = 2<br/> 034 * SELECT ...</code> 035 * </blockquote> 036 * 037 * there are two property-value pairs FORMAT_STRING and SOLVE_ORDER. 038 * 039 * @version $Id: PropertyValueNode.java 482 2012-01-05 23:27:27Z jhyde $ 040 * @author jhyde 041 */ 042public class PropertyValueNode implements ParseTreeNode { 043 044 private final ParseRegion region; 045 private final String name; 046 private ParseTreeNode expression; 047 048 /** 049 * Creates a PropertyValueNode. 050 * 051 * @param region Region of source code 052 * @param name Name of property 053 * @param expression Expression for value of property (often a literal) 054 */ 055 public PropertyValueNode( 056 ParseRegion region, 057 String name, 058 ParseTreeNode expression) 059 { 060 this.region = region; 061 this.name = name; 062 this.expression = expression; 063 } 064 065 public ParseRegion getRegion() { 066 return region; 067 } 068 069 public Type getType() { 070 return expression.getType(); 071 } 072 073 /** 074 * Returns the expression by which the value of the property is derived. 075 * 076 * @return the expression by which the value of the property is derived 077 */ 078 public ParseTreeNode getExpression() { 079 return expression; 080 } 081 082 /** 083 * Returns the name of the property 084 * 085 * @return name of the property 086 */ 087 public String getName() { 088 return name; 089 } 090 091 public <T> T accept(ParseTreeVisitor<T> visitor) { 092 return visitor.visit(this); 093 } 094 095 public void unparse(ParseTreeWriter writer) { 096 writer.getPrintWriter().print(name + " = "); 097 expression.unparse(writer); 098 } 099 100 public PropertyValueNode deepCopy() { 101 return new PropertyValueNode( 102 this.region, 103 this.name, 104 this.expression.deepCopy()); 105 } 106} 107 108// End PropertyValueNode.java