hep.aida

Interface IEvaluator

All Known Implementing Classes:

Evaluator

public interface IEvaluator

User's level interface of an IEvaluator.

Method Summary

Modifier and Type	Method and Description
double	evaluateDouble() Evaluate the IEvaluator from the data in the current row of the ITuple it is associated to.
java.lang.String	expression() Get the expression that defined the IEvaluator.
void	initialize(ITuple ituple) Initialize the IEvaluator and associate it to an ITuple.

Method Detail

initialize

void initialize(ITuple ituple)
         throws java.lang.IllegalArgumentException

Initialize the IEvaluator and associate it to an ITuple.

Parameters:

ituple - The ITuple to which the IEvaluator is associated.

Throws:

java.lang.IllegalArgumentException - If the IEvaluator and the ITuple are not compatible.

evaluateDouble

double evaluateDouble()
               throws java.lang.RuntimeException

Evaluate the IEvaluator from the data in the current row of the ITuple it is associated to.

Returns:

The current value of the Evaluator.

Throws:

java.lang.RuntimeException - if the IEvaluator has not been initialized.

expression

java.lang.String expression()

Get the expression that defined the IEvaluator.

Returns:

The expression.