mondrian.calc
Interface DoubleCalc

All Superinterfaces:

Calc

All Known Implementing Classes:

AbstractDoubleCalc, AbstractVoidCalc, AggregateFunDef.AggregateCalc, CacheCalc, ConstantCalc, GenericCalc, MemberArrayValueCalc, MemberValueCalc, TupleValueCalc, ValueCalc

public interface DoubleCalc
extends Calc

Compiled expression whose result is a double.

When implementing this interface, it is convenient to extend AbstractDoubleCalc, but it is not required.

Since:

Sep 27, 2005

Author:

jhyde

Method Summary

double

evaluateDouble(Evaluator evaluator) Evaluates this expression to yield a double value.

Methods inherited from interface mondrian.calc.Calc

accept, dependsOn, evaluate, getResultStyle, getType, isWrapperFor, unwrap

Method Detail

evaluateDouble

double evaluateDouble(Evaluator evaluator)

Evaluates this expression to yield a double value. If the result is null, returns the special FunUtil.DoubleNull value.

Parameters:

evaluator - Evaluation context

Returns:

evaluation result