TupleCalc (Pentaho Community Edition Project: mondrian 9.4.0.0-343 API)

All Superinterfaces:

Calc

All Known Implementing Classes:

AbstractTupleCalc, AbstractVoidCalc, AggregateFunDef.AggregateCalc, CacheCalc, ConstantCalc, GenericCalc, MemberArrayValueCalc, MemberValueCalc, TupleFunDef.CalcImpl, TupleValueCalc, ValueCalc
```
public interface TupleCalc
extends Calc
```
Expression which yields a tuple.
The tuple is represented as an array of Member objects, null to represent the null tuple.
When implementing this interface, it is convenient to extend AbstractTupleCalc, but it is not required.

Since:

Sep 27, 2005

Author:

jhyde

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Member[] evaluateTuple(Evaluator evaluator)
  Evaluates this expression to yield a tuple.
  - Methods inherited from interface mondrian.calc.Calc
    accept, dependsOn, evaluate, getResultStyle, getType, isWrapperFor, unwrap

- Method Detail
  - evaluateTuple
```
Member[] evaluateTuple(Evaluator evaluator)
```
    Evaluates this expression to yield a tuple.
    A tuple cannot contain any null members. If any of the members is null, this method must return a null.
    
    Parameters:
    
    evaluator - Evaluation context
    
    Returns:
    
    an array of members, or null to represent the null tuple