Package net.sf.jasperreports.compilers

Class DirectEvaluator

java.lang.Object

net.sf.jasperreports.engine.fill.JREvaluator

net.sf.jasperreports.compilers.DirectEvaluator

All Implemented Interfaces:

DatasetExpressionEvaluator

public class DirectEvaluator
extends JREvaluator

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Field Summary

Fields inherited from class net.sf.jasperreports.engine.fill.JREvaluator

EXCEPTION_MESSAGE_KEY_RESOURCE_NOT_FOUND, ignoreNPE, PROPERTY_IGNORE_NPE

Constructor Summary

Constructors

Constructor	Description
DirectEvaluator()

Method Summary

Modifier and Type	Method	Description
protected void	customizedInit(Map<String,JRFillParameter> parametersMap, Map<String,JRFillField> fieldsMap, Map<String,JRFillVariable> variablesMap)	Initializes the parameters, fields and variables of the evaluator.
protected Object	evaluate(int id)	Evaluates an expression using current fields and variables values.
protected Object	evaluateEstimated(int id)	Evaluates an expression using estimated variables values.
protected Object	evaluateOld(int id)	Evaluates an expression using old fields and variables values.

Methods inherited from class net.sf.jasperreports.engine.fill.JREvaluator

evaluate, evaluateEstimated, evaluateOld, getFunctionSupport, handleEvaluationException, handleMissingResource, init, msg, msg, msg, msg, setDirectExpressionEvaluators, str

Methods inherited from class java.lang.Object

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

Constructor Details

DirectEvaluator

public DirectEvaluator()

Method Details

customizedInit

protected void customizedInit(Map<String,JRFillParameter> parametersMap,
 Map<String,JRFillField> fieldsMap,
 Map<String,JRFillVariable> variablesMap)
                       throws JRException

Description copied from class: JREvaluator

Initializes the parameters, fields and variables of the evaluator.

Specified by:

customizedInit in class JREvaluator

Parameters:

parametersMap - the parameters indexed by name

fieldsMap - the fields indexed by name

variablesMap - the variables indexed by name

Throws:

JRException

evaluate

protected Object evaluate(int id)
                   throws Throwable

Description copied from class: JREvaluator

Evaluates an expression using current fields and variables values.

Specified by:

evaluate in class JREvaluator

Parameters:

id - the expression id

Returns:

the result of the evaluation

Throws:

Throwable

See Also:

• JRExpression.EVALUATION_DEFAULT
• JRFillVariable.getValue()
• JRFillField.getValue()

evaluateOld

protected Object evaluateOld(int id)
                      throws Throwable

Description copied from class: JREvaluator

Evaluates an expression using old fields and variables values.

Specified by:

evaluateOld in class JREvaluator

Parameters:

id - the expression id

Returns:

the result of the evaluation

Throws:

Throwable

See Also:

• JRExpression.EVALUATION_OLD
• JRFillVariable.getOldValue()
• JRFillField.getOldValue()

evaluateEstimated

protected Object evaluateEstimated(int id)
                            throws Throwable

Description copied from class: JREvaluator

Evaluates an expression using estimated variables values.

Specified by:

evaluateEstimated in class JREvaluator

Parameters:

id - the expression id

Returns:

the result of the evaluation

Throws:

Throwable

See Also:

• JRExpression.EVALUATION_ESTIMATED
• JRFillVariable.getEstimatedValue()