Package net.sf.jasperreports.javascript

Class JavaScriptEvaluator

java.lang.Object

net.sf.jasperreports.engine.fill.JREvaluator

net.sf.jasperreports.javascript.JavaScriptEvaluator

All Implemented Interfaces:

DatasetExpressionEvaluator, JasperReportsContextAware

public class JavaScriptEvaluator
extends JREvaluator
implements JasperReportsContextAware

JavaScript expression evaluator that compiles expressions at fill time.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

See Also:

• JavaScriptCompiler

Field Summary

Fields

Modifier and Type	Field	Description
static final String	EXCEPTION_MESSAGE_KEY_EVALUATOR_LOAD_ERROR
static final String	PROPERTY_OPTIMIZATION_LEVEL	Property that determines the optimization level used when compiling expressions.

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
JavaScriptEvaluator(JasperReportsContext jrContext, JavaScriptCompileData compileData)	Create a JavaScript expression evaluator.

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	evaluateExpression(String expression)
protected Object	evaluateOld(int id)	Evaluates an expression using old fields and variables values.
protected JavaScriptCompileData.Expression	getExpression(int id)
void	setJasperReportsContext(JasperReportsContext context)

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

Field Details

PROPERTY_OPTIMIZATION_LEVEL

public static final String PROPERTY_OPTIMIZATION_LEVEL

Property that determines the optimization level used when compiling expressions. See

See Also:

• Constant Field Values

EXCEPTION_MESSAGE_KEY_EVALUATOR_LOAD_ERROR

public static final String EXCEPTION_MESSAGE_KEY_EVALUATOR_LOAD_ERROR

See Also:

• Constant Field Values

Constructor Details

JavaScriptEvaluator

public JavaScriptEvaluator(JasperReportsContext jrContext,
 JavaScriptCompileData compileData)

Create a JavaScript expression evaluator.

Parameters:

compileData - the report compile data

Method Details

setJasperReportsContext

public void setJasperReportsContext(JasperReportsContext context)

Specified by:

setJasperReportsContext in interface JasperReportsContextAware

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()

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()

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()

getExpression

protected JavaScriptCompileData.Expression getExpression(int id)

evaluateExpression

protected Object evaluateExpression(String expression)