/*
// $Id: //open/mondrian-release/3.2/src/main/mondrian/olap/fun/XtdFunDef.java#1 $
// This software is subject to the terms of the Eclipse Public License v1.0
// Agreement, available at the following URL:
// http://www.eclipse.org/legal/epl-v10.html.
// Copyright (C) 2005-2009 Julian Hyde
// All Rights Reserved.
// You must accept the terms of that agreement to use this software.
*/
package mondrian.olap.fun;
import mondrian.olap.*;
import mondrian.olap.type.Type;
import mondrian.olap.type.SetType;
import mondrian.olap.type.MemberType;
import mondrian.resource.MondrianResource;
import mondrian.calc.*;
import mondrian.calc.impl.AbstractListCalc;
import mondrian.mdx.ResolvedFunCall;
import mondrian.rolap.RolapCube;
import mondrian.rolap.RolapHierarchy;
import java.util.List;
/**
* Definition of <code>Ytd</code>, <code>Qtd</code>, <code>Mtd</code>,
* and <code>Wtd</code> MDX builtin functions.
*
* @author jhyde
* @version $Id: //open/mondrian-release/3.2/src/main/mondrian/olap/fun/XtdFunDef.java#1 $
* @since Mar 23, 2006
*/
class XtdFunDef extends FunDefBase {
private final LevelType levelType;
static final ResolverImpl MtdResolver = new ResolverImpl(
"Mtd",
"Mtd([<Member>])",
"A shortcut function for the PeriodsToDate function that specifies the level to be Month.",
new String[]{"fx", "fxm"},
LevelType.TimeMonths);
static final ResolverImpl QtdResolver = new ResolverImpl(
"Qtd",
"Qtd([<Member>])",
"A shortcut function for the PeriodsToDate function that specifies the level to be Quarter.",
new String[]{"fx", "fxm"},
LevelType.TimeQuarters);
static final ResolverImpl WtdResolver = new ResolverImpl(
"Wtd",
"Wtd([<Member>])",
"A shortcut function for the PeriodsToDate function that specifies the level to be Week.",
new String[]{"fx", "fxm"},
LevelType.TimeWeeks);
static final ResolverImpl YtdResolver = new ResolverImpl(
"Ytd",
"Ytd([<Member>])",
"A shortcut function for the PeriodsToDate function that specifies the level to be Year.",
new String[]{"fx", "fxm"},
LevelType.TimeYears);
public XtdFunDef(FunDef dummyFunDef, LevelType levelType) {
super(dummyFunDef);
this.levelType = levelType;
}
public Type getResultType(Validator validator, Exp[] args) {
if (args.length == 0) {
// With no args, the default implementation cannot
// guess the hierarchy.
RolapHierarchy defaultTimeHierarchy =
((RolapCube) validator.getQuery().getCube()).getTimeHierarchy(
getName());
return new SetType(MemberType.forHierarchy(defaultTimeHierarchy));
}
final Type type = args[0].getType();
if (type.getDimension().getDimensionType()
!= DimensionType.TimeDimension)
{
throw MondrianResource.instance().TimeArgNeeded.ex(getName());
}
return super.getResultType(validator, args);
}
private Level getLevel(Evaluator evaluator) {
switch (levelType) {
case TimeYears:
return evaluator.getCube().getYearLevel();
case TimeQuarters:
return evaluator.getCube().getQuarterLevel();
case TimeMonths:
return evaluator.getCube().getMonthLevel();
case TimeWeeks:
return evaluator.getCube().getWeekLevel();
case TimeDays:
return evaluator.getCube().getWeekLevel();
default:
throw Util.badValue(levelType);
}
}
public Calc compileCall(ResolvedFunCall call, ExpCompiler compiler) {
final Level level = getLevel(compiler.getEvaluator());
switch (call.getArgCount()) {
case 0:
return new AbstractListCalc(call, new Calc[0]) {
public List evaluateList(Evaluator evaluator) {
return periodsToDate(evaluator, level, null);
}
public boolean dependsOn(Hierarchy hierarchy) {
return hierarchy.getDimension().getDimensionType()
== mondrian.olap.DimensionType.TimeDimension;
}
};
default:
final MemberCalc memberCalc =
compiler.compileMember(call.getArg(0));
return new AbstractListCalc(call, new Calc[] {memberCalc}) {
public List evaluateList(Evaluator evaluator) {
return periodsToDate(
evaluator, level,
memberCalc.evaluateMember(evaluator));
}
};
}
}
private static class ResolverImpl extends MultiResolver {
private final LevelType levelType;
public ResolverImpl(
String name,
String signature,
String description,
String[] signatures,
LevelType levelType)
{
super(name, signature, description, signatures);
this.levelType = levelType;
}
protected FunDef createFunDef(Exp[] args, FunDef dummyFunDef) {
return new XtdFunDef(dummyFunDef, levelType);
}
}
}
// End XtdFunDef.java