net.sf.jasperreports.engine.fill
Class JRCalculator

java.lang.Object
  net.sf.jasperreports.engine.fill.JRCalculator

All Implemented Interfaces:

JRFillExpressionEvaluator

public class JRCalculator
extends Object
implements JRFillExpressionEvaluator

Version:

$Id: JRCalculator.java 5180 2012-03-29 13:23:12Z teodord $

Author:

Teodor Danciu (teodord@users.sourceforge.net)

Field Summary

protected JRFillDataset	dataset
protected JRFillElementDataset[]	datasets
protected Map<String,JRFillField>	fldsm
protected JRFillGroup[]	groups
protected Map<String,JRFillParameter>	parsm
protected JRFillVariable[]	variables
protected Map<String,JRFillVariable>	varsm

Constructor Summary

protected	JRCalculator(DatasetExpressionEvaluator evaluator) Creates a calculator using an expression evaluator.
protected	JRCalculator(JREvaluator evaluator) Creates a calculator using an expression evaluator.

Method Summary

void	calculateVariables()
void	estimateGroupRuptures() Determines group breaks based on estimated report values.
void	estimateVariables()
Object	evaluate(JRExpression expression)
Object	evaluate(JRExpression expression, byte evaluationType) Evaluates an expression.
Object	evaluateEstimated(JRExpression expression)
Object	evaluateOld(JRExpression expression)
JRFillVariable	getColumnNumber()
JRFillDataset	getFillDataset() Returns the dataset used by the expression evaluator.
JRFillVariable	getPageNumber()
protected void	init(JRFillDataset dataset) Initializes the calculator.
void	initializeVariables(ResetTypeEnum resetType, IncrementTypeEnum incrementType)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

dataset

protected JRFillDataset dataset

parsm

protected Map<String,JRFillParameter> parsm

fldsm

protected Map<String,JRFillField> fldsm

varsm

protected Map<String,JRFillVariable> varsm

variables

protected JRFillVariable[] variables

groups

protected JRFillGroup[] groups

datasets

protected JRFillElementDataset[] datasets

Constructor Detail

JRCalculator

protected JRCalculator(DatasetExpressionEvaluator evaluator)

Creates a calculator using an expression evaluator.

Parameters:

evaluator - the expression evaluator

JRCalculator

protected JRCalculator(JREvaluator evaluator)

Creates a calculator using an expression evaluator.

Parameters:

evaluator - the expression evaluator

Method Detail

init

protected void init(JRFillDataset dataset)
             throws JRException

Initializes the calculator.

Parameters:

dataset - the dataset this calculator is used for

Throws:

JRException

getPageNumber

public JRFillVariable getPageNumber()

getColumnNumber

public JRFillVariable getColumnNumber()

calculateVariables

public void calculateVariables()
                        throws JRException

Throws:

JRException

estimateVariables

public void estimateVariables()
                       throws JRException

Throws:

JRException

estimateGroupRuptures

public void estimateGroupRuptures()
                           throws JRException

Determines group breaks based on estimated report values.

estimateVariables() needs to be called prior to this method.

Throws:

JRException

initializeVariables

public void initializeVariables(ResetTypeEnum resetType,
                                IncrementTypeEnum incrementType)
                         throws JRException

Throws:

JRException

evaluate

public Object evaluate(JRExpression expression,
                       byte evaluationType)
                throws JRException

Description copied from interface: JRFillExpressionEvaluator

Evaluates an expression.

Specified by:

evaluate in interface JRFillExpressionEvaluator

Parameters:

expression - the expression to evaluate

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

Returns:

the result

Throws:

JRException

evaluateOld

public Object evaluateOld(JRExpression expression)
                   throws JRExpressionEvalException

Throws:

JRExpressionEvalException

evaluateEstimated

public Object evaluateEstimated(JRExpression expression)
                         throws JRExpressionEvalException

Throws:

JRExpressionEvalException

evaluate

public Object evaluate(JRExpression expression)
                throws JRExpressionEvalException

Throws:

JRExpressionEvalException

getFillDataset

public JRFillDataset getFillDataset()

Description copied from interface: JRFillExpressionEvaluator

Returns the dataset used by the expression evaluator.

Specified by:

getFillDataset in interface JRFillExpressionEvaluator