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

Author:

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

Field Summary

Fields

Modifier and Type	Field and Description
protected static ExpressionParser	parser

Fields inherited from interface org.kuali.rice.krad.uif.service.ExpressionEvaluatorService

EMBEDDED_PROPERTY_NAME_ADD_INDICATOR

Constructor Summary

Constructors

Constructor and Description
ExpressionEvaluatorServiceImpl()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addCustomFunctions(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)
Object	evaluateExpression(StandardEvaluationContext context, String expressionStr)
void	evaluateExpressionsOnConfigurable(View view, UifDictionaryBean expressionConfigurable, Object contextObject, Map<String,Object> evaluationParameters)
void	evaluateExpressionsOnConfigurable(View view, UifDictionaryBean expressionConfigurable, StandardEvaluationContext context)
String	evaluateExpressionTemplate(Object contextObject, Map<String,Object> evaluationParameters, String expressionTemplate)
String	evaluateExpressionTemplate(StandardEvaluationContext context, String expressionTemplate)
protected void	evaluatePropertyExpressions(View view, UifDictionaryBean expressionConfigurable, Object contextObject, Map<String,Object> evaluationParameters)
protected void	evaluatePropertyExpressions(View view, UifDictionaryBean expressionConfigurable, StandardEvaluationContext context) Retrieves the Map from the given object that containing the property expressions that should be evaluated.
protected void	evaluatePropertyReplacers(View view, UifDictionaryBean expressionConfigurable, Object contextObject, Map<String,Object> evaluationParameters)
protected void	evaluatePropertyReplacers(View view, UifDictionaryBean expressionConfigurable, StandardEvaluationContext context) Iterates through any configured PropertyReplacer instances for the component and evaluates the given condition.
StandardEvaluationContext	getContext(Object contextObject, Map<String,Object> evaluationParameters)
protected static String	getLinePathPrefixValue(Component component) Determines the value for the UifConstants.LINE_PATH_BIND_ADJUST_PREFIX binding prefix based on collection group found in the component context
String	replaceBindingPrefixes(View view, Object object, String expression)

Methods inherited from class java.lang.Object

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

Field Detail

parser

protected static ExpressionParser parser

Constructor Detail

ExpressionEvaluatorServiceImpl

public ExpressionEvaluatorServiceImpl()

Method Detail

evaluateExpressionsOnConfigurable

public void evaluateExpressionsOnConfigurable(View view,
                                     UifDictionaryBean expressionConfigurable,
                                     StandardEvaluationContext context)

See Also:

org.kuali.rice.krad.uif.service.ExpressionEvaluatorService#evaluateExpressionsOnConfigurable(org.kuali.rice.krad.uif.view.View, org.kuali.rice.krad.datadictionary.uif.UifDictionaryBean, Object, java.util.Map)

evaluateExpressionsOnConfigurable

public void evaluateExpressionsOnConfigurable(View view,
                                     UifDictionaryBean expressionConfigurable,
                                     Object contextObject,
                                     Map<String,Object> evaluationParameters)

Specified by:

evaluateExpressionsOnConfigurable in interface ExpressionEvaluatorService

evaluateExpressionTemplate

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

Specified by:

evaluateExpressionTemplate in interface ExpressionEvaluatorService

evaluateExpressionTemplate

public String evaluateExpressionTemplate(StandardEvaluationContext context,
                                String expressionTemplate)

See Also:

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

evaluateExpression

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

Specified by:

evaluateExpression in interface ExpressionEvaluatorService

evaluateExpression

public Object evaluateExpression(StandardEvaluationContext context,
                        String expressionStr)

See Also:

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

getContext

public StandardEvaluationContext getContext(Object contextObject,
                                   Map<String,Object> evaluationParameters)

addCustomFunctions

protected void addCustomFunctions(StandardEvaluationContext context)

Registers custom functions for el expressions with the given context

Parameters:

context - - context instance to register functions to

evaluatePropertyReplacers

protected void evaluatePropertyReplacers(View view,
                             UifDictionaryBean expressionConfigurable,
                             StandardEvaluationContext context)

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:

view - - view instance being rendered

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

context - - context for el evaluation

evaluatePropertyReplacers

protected void evaluatePropertyReplacers(View view,
                             UifDictionaryBean expressionConfigurable,
                             Object contextObject,
                             Map<String,Object> evaluationParameters)

evaluatePropertyExpressions

protected void evaluatePropertyExpressions(View view,
                               UifDictionaryBean expressionConfigurable,
                               StandardEvaluationContext context)

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:

view - - view instance that is being rendered

expressionConfigurable - - object instance to evaluate expressions for

context - - object providing the default context for expressions

evaluatePropertyExpressions

protected void evaluatePropertyExpressions(View view,
                               UifDictionaryBean expressionConfigurable,
                               Object contextObject,
                               Map<String,Object> evaluationParameters)

containsElPlaceholder

public boolean containsElPlaceholder(String value)

Specified by:

containsElPlaceholder in interface ExpressionEvaluatorService

See Also:

ExpressionEvaluatorService.containsElPlaceholder(String)

replaceBindingPrefixes

public String replaceBindingPrefixes(View view,
                            Object object,
                            String expression)

Specified by:

replaceBindingPrefixes in interface ExpressionEvaluatorService

See Also:

ExpressionEvaluatorService.replaceBindingPrefixes(org.kuali.rice.krad.uif.view.View, Object, String)

getLinePathPrefixValue

protected static String getLinePathPrefixValue(Component component)

Determines the value for the UifConstants.LINE_PATH_BIND_ADJUST_PREFIX binding prefix based on collection group found in the component context

Parameters:

component - - component instance for which the prefix is configured on

Returns:

String line binding path or empty string if path not found