/*
// $Id: //open/mondrian-release/3.2/src/main/mondrian/olap/fun/LevelHierarchyFunDef.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) 2006-2007 Julian Hyde
// All Rights Reserved.
// You must accept the terms of that agreement to use this software.
*/
package mondrian.olap.fun;
import mondrian.calc.Calc;
import mondrian.calc.ExpCompiler;
import mondrian.calc.LevelCalc;
import mondrian.calc.impl.AbstractHierarchyCalc;
import mondrian.mdx.ResolvedFunCall;
import mondrian.olap.Exp;
import mondrian.olap.Hierarchy;
import mondrian.olap.Evaluator;
import mondrian.olap.Level;
/**
* Definition of the <code><Level>.Hierarchy</code> MDX builtin function.
*
* @author jhyde
* @version $Id: //open/mondrian-release/3.2/src/main/mondrian/olap/fun/LevelHierarchyFunDef.java#1 $
* @since Mar 23, 2006
*/
public class LevelHierarchyFunDef extends FunDefBase {
static final LevelHierarchyFunDef instance = new LevelHierarchyFunDef();
private LevelHierarchyFunDef() {
super("Hierarchy", "Returns a level's hierarchy.", "phl");
}
public Calc compileCall(ResolvedFunCall call, ExpCompiler compiler) {
final LevelCalc levelCalc =
compiler.compileLevel(call.getArg(0));
return new CalcImpl(call, levelCalc);
}
public static class CalcImpl extends AbstractHierarchyCalc {
private final LevelCalc levelCalc;
public CalcImpl(Exp exp, LevelCalc levelCalc) {
super(exp, new Calc[] {levelCalc});
this.levelCalc = levelCalc;
}
public Hierarchy evaluateHierarchy(Evaluator evaluator) {
Level level = levelCalc.evaluateLevel(evaluator);
return level.getHierarchy();
}
}
}
// End LevelHierarchyFunDef.java