/*
// $Id: //open/mondrian-release/3.2/src/main/mondrian/olap/fun/FormatFunDef.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) 2006-2009 Julian Hyde
// All Rights Reserved.
// You must accept the terms of that agreement to use this software.
*/
package mondrian.olap.fun;
import mondrian.olap.FunDef;
import mondrian.olap.Exp;
import mondrian.olap.Literal;
import mondrian.olap.Evaluator;
import mondrian.calc.*;
import mondrian.calc.impl.AbstractStringCalc;
import mondrian.mdx.ResolvedFunCall;
import mondrian.util.Format;
import java.util.Locale;
/**
* Definition of the <code>Format</code> MDX function.
*
* @author jhyde
* @version $Id: //open/mondrian-release/3.2/src/main/mondrian/olap/fun/FormatFunDef.java#1 $
* @since Mar 23, 2006
*/
class FormatFunDef extends FunDefBase {
static final ReflectiveMultiResolver Resolver = new ReflectiveMultiResolver(
"Format",
"Format(<Expression>, <String Expression>)",
"Formats a number or date to a string.",
new String[] { "fSmS", "fSnS", "fSDS" },
FormatFunDef.class);
public FormatFunDef(FunDef dummyFunDef) {
super(dummyFunDef);
}
public Calc compileCall(ResolvedFunCall call, ExpCompiler compiler) {
final Exp[] args = call.getArgs();
final Calc calc = compiler.compileScalar(call.getArg(0), true);
final Locale locale = compiler.getEvaluator().getConnectionLocale();
if (args[1] instanceof Literal) {
// Constant string expression: optimize by
// compiling format string.
String formatString = (String) ((Literal) args[1]).getValue();
final Format format = new Format(formatString, locale);
return new AbstractStringCalc(call, new Calc[] {calc}) {
public String evaluateString(Evaluator evaluator) {
final Object o = calc.evaluate(evaluator);
return format.format(o);
}
};
} else {
// Variable string expression
final StringCalc stringCalc =
compiler.compileString(call.getArg(1));
return new AbstractStringCalc(call, new Calc[] {calc, stringCalc}) {
public String evaluateString(Evaluator evaluator) {
final Object o = calc.evaluate(evaluator);
final String formatString =
stringCalc.evaluateString(evaluator);
final Format format =
new Format(formatString, locale);
return format.format(o);
}
};
}
}
}
// End FormatFunDef.java
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