Package net.sf.jasperreports.engine.fill

Interface JRFillExpressionEvaluator

All Known Subinterfaces:

FillContext

All Known Implementing Classes:

BuiltinFillExpressionEvaluatorDecorator, JRCalculator, JRCrosstabExpressionEvaluator, JRFillComponentElement

public interface JRFillExpressionEvaluator

Fill time expression evaluators interface.

An instance of this interface is used at fill time by elements to evaluate expressions.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Method Summary

Modifier and Type	Method	Description
Object	evaluate(JRExpression expression, byte evaluationType)	Evaluates an expression.
JRFillDataset	getFillDataset()	Returns the dataset used by the expression evaluator.

Method Details

evaluate

Object evaluate(JRExpression expression,
 byte evaluationType)
         throws JRException

Evaluates an expression.

Parameters:

expression - the expression to evaluate

evaluationType - one of JRExpression.EVALUATION_DEFAULT, JRExpression.EVALUATION_OLD, JRExpression.EVALUATION_ESTIMATED

Returns:

the result

Throws:

JRException

getFillDataset

JRFillDataset getFillDataset()

Returns the dataset used by the expression evaluator.