org.kuali.rice.krad.uif.service.impl

Class ExpressionEvaluatorServiceImpl

java.lang.Object

org.kuali.rice.krad.uif.service.impl.ExpressionEvaluatorServiceImpl

All Implemented Interfaces:

ExpressionEvaluatorService

public class ExpressionEvaluatorServiceImpl
extends Object
implements ExpressionEvaluatorService

Evaluates expression language statements using the Spring EL engine TODO: Look into using Rice KRMS for evaluation

Author:

Kuali Rice Team (rice.collab@kuali.org)

Constructor Summary

Constructors

Constructor and Description
ExpressionEvaluatorServiceImpl()

Method Summary

Modifier and Type	Method and Description
protected void	addCustomFunctions(org.springframework.expression.spel.support.StandardEvaluationContext context) Registers custom functions for el expressions with the given context
boolean	containsElPlaceholder(String value)
Object	evaluateExpression(Object contextObject, Map<String,Object> evaluationParameters, String expressionStr)
String	evaluateExpressionTemplate(Object contextObject, Map<String,Object> evaluationParameters, String expressionTemplate)
void	evaluateObjectExpressions(Object object, Object contextObject, Map<String,Object> evaluationParameters)
protected void	evaluatePropertyExpressions(Object object, Object contextObject, Map<String,Object> evaluationParameters) Retrieves the Map from the given object that containing the property expressions that should be evaluated.
protected void	evaluatePropertyReplacers(Object object, Object contextObject, Map<String,Object> evaluationParameters) Iterates through any configured PropertyReplacer instances for the component and evaluates the given condition.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionEvaluatorServiceImpl

public ExpressionEvaluatorServiceImpl()

Method Detail

evaluateObjectExpressions

public void evaluateObjectExpressions(Object object,
                                      Object contextObject,
                                      Map<String,Object> evaluationParameters)

Specified by:

evaluateObjectExpressions in interface ExpressionEvaluatorService

See Also:

ExpressionEvaluatorService.evaluateObjectExpressions(java.lang.Object, java.lang.Object, java.util.Map)

evaluateExpressionTemplate

public String evaluateExpressionTemplate(Object contextObject,
                                         Map<String,Object> evaluationParameters,
                                         String expressionTemplate)

Specified by:

evaluateExpressionTemplate in interface ExpressionEvaluatorService

See Also:

ExpressionEvaluatorService.evaluateExpressionTemplate(java.lang.Object, java.util.Map, java.lang.String)

evaluateExpression

public Object evaluateExpression(Object contextObject,
                                 Map<String,Object> evaluationParameters,
                                 String expressionStr)

Specified by:

evaluateExpression in interface ExpressionEvaluatorService

See Also:

ExpressionEvaluatorService.evaluateExpression(java.lang.Object, java.util.Map, java.lang.String)

addCustomFunctions

protected void addCustomFunctions(org.springframework.expression.spel.support.StandardEvaluationContext context)

Registers custom functions for el expressions with the given context

Parameters:

context - - context instance to register functions to

evaluatePropertyReplacers

protected void evaluatePropertyReplacers(Object object,
                                         Object contextObject,
                                         Map<String,Object> evaluationParameters)

Iterates through any configured PropertyReplacer instances for the component and evaluates the given condition. If the condition is met, the replacement value is set on the corresponding property

Parameters:

object - - object instance with property replacers list, should be either a component or layout manager

contextObject - - context for el evaluation

evaluationParameters - - parameters for el evaluation

evaluatePropertyExpressions

protected void evaluatePropertyExpressions(Object object,
                                           Object contextObject,
                                           Map<String,Object> evaluationParameters)

Retrieves the Map from the given object that containing the property expressions that should be evaluated. Each expression is then evaluated and the result is used to set the property value

If the expression is an el template (part static text and part expression), only the expression part will be replaced with the result. More than one expressions may be contained within the template

Parameters:

object - - object instance to evaluate expressions for

contextObject - - object providing the default context for expressions

evaluationParameters - - map of additional parameters that may be used within the expressions

containsElPlaceholder

public boolean containsElPlaceholder(String value)

Specified by:

containsElPlaceholder in interface ExpressionEvaluatorService

See Also:

ExpressionEvaluatorService.containsElPlaceholder(java.lang.String)