JRFillExpressionEvaluator (JasperReports Javadoc 7.0.0 API)

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

All Methods Instance Methods Abstract Methods
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 Detail
  - 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.