org.apache.el.lang

Class EvaluationContext

java.lang.Object

javax.el.ELContext

org.apache.el.lang.EvaluationContext

public final class EvaluationContext
extends ELContext

Constructor Summary

Constructors

Constructor and Description
EvaluationContext(ELContext elContext, FunctionMapper fnMapper, VariableMapper varMapper)

Method Summary

Methods

Modifier and Type	Method and Description
void	addEvaluationListener(EvaluationListener listener) Register an EvaluationListener with this ELContext.
Object	convertToType(Object obj, Class<?> type) Coerce the supplied object to the requested type.
void	enterLambdaScope(Map<String,Object> arguments) Called when starting to evaluate a lambda expression so that the arguments are available to the EL context during evaluation.
void	exitLambdaScope() Called after evaluating a lambda expression to signal that the arguments are no longer required.
Object	getContext(Class key) Obtain the context object for the given key.
ELContext	getELContext()
ELResolver	getELResolver()
List<EvaluationListener>	getEvaluationListeners() Obtain the list of registered EvaluationListeners.
FunctionMapper	getFunctionMapper()
ImportHandler	getImportHandler() Obtain the ImportHandler for this ELContext, creating one if necessary.
Object	getLambdaArgument(String name) Obtain the value of the lambda argument with the given name.
Locale	getLocale()
VariableMapper	getVariableMapper()
boolean	isLambdaArgument(String name) Determine if the specified name is recognised as the name of a lambda argument.
boolean	isPropertyResolved()
void	notifyAfterEvaluation(String expression) Notify interested listeners that an expression has been evaluated.
void	notifyBeforeEvaluation(String expression) Notify interested listeners that an expression will be evaluated.
void	notifyPropertyResolved(Object base, Object property) Notify interested listeners that a property has been resolved.
void	putContext(Class key, Object contextObject) Add an object to this EL context under the given key.
void	setLocale(Locale locale)
void	setPropertyResolved(boolean resolved)
void	setPropertyResolved(Object base, Object property) Mark the given property as resolved and notfy any interested listeners.

Methods inherited from class java.lang.Object

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

Constructor Detail

EvaluationContext

public EvaluationContext(ELContext elContext,
                 FunctionMapper fnMapper,
                 VariableMapper varMapper)

Method Detail

getELContext

public ELContext getELContext()

getFunctionMapper

public FunctionMapper getFunctionMapper()

Specified by:

getFunctionMapper in class ELContext

getVariableMapper

public VariableMapper getVariableMapper()

Specified by:

getVariableMapper in class ELContext

getContext

public Object getContext(Class key)

Description copied from class: ELContext

Obtain the context object for the given key.

Overrides:

getContext in class ELContext

Parameters:

key - The key of the required context object

Returns:

The value of the context object associated with the given key

getELResolver

public ELResolver getELResolver()

Specified by:

getELResolver in class ELContext

isPropertyResolved

public boolean isPropertyResolved()

Overrides:

isPropertyResolved in class ELContext

putContext

public void putContext(Class key,
              Object contextObject)

Description copied from class: ELContext

Add an object to this EL context under the given key.

Overrides:

putContext in class ELContext

Parameters:

key - The key under which to store the object

contextObject - The object to add

setPropertyResolved

public void setPropertyResolved(boolean resolved)

Overrides:

setPropertyResolved in class ELContext

getLocale

public Locale getLocale()

Overrides:

getLocale in class ELContext

setLocale

public void setLocale(Locale locale)

Overrides:

setLocale in class ELContext

setPropertyResolved

public void setPropertyResolved(Object base,
                       Object property)

Description copied from class: ELContext

Mark the given property as resolved and notfy any interested listeners.

Overrides:

setPropertyResolved in class ELContext

Parameters:

base - The base object on which the property was found

property - The property that was resolved

getImportHandler

public ImportHandler getImportHandler()

Description copied from class: ELContext

Obtain the ImportHandler for this ELContext, creating one if necessary. This method is not thread-safe.

Overrides:

getImportHandler in class ELContext

Returns:

the ImportHandler for this ELContext.

addEvaluationListener

public void addEvaluationListener(EvaluationListener listener)

Description copied from class: ELContext

Register an EvaluationListener with this ELContext.

Overrides:

addEvaluationListener in class ELContext

Parameters:

listener - The EvaluationListener to register

getEvaluationListeners

public List<EvaluationListener> getEvaluationListeners()

Description copied from class: ELContext

Obtain the list of registered EvaluationListeners.

Overrides:

getEvaluationListeners in class ELContext

Returns:

A list of the EvaluationListener registered with this ELContext

notifyBeforeEvaluation

public void notifyBeforeEvaluation(String expression)

Description copied from class: ELContext

Notify interested listeners that an expression will be evaluated.

Overrides:

notifyBeforeEvaluation in class ELContext

Parameters:

expression - The expression that will be evaluated

notifyAfterEvaluation

public void notifyAfterEvaluation(String expression)

Description copied from class: ELContext

Notify interested listeners that an expression has been evaluated.

Overrides:

notifyAfterEvaluation in class ELContext

Parameters:

expression - The expression that was evaluated

notifyPropertyResolved

public void notifyPropertyResolved(Object base,
                          Object property)

Description copied from class: ELContext

Notify interested listeners that a property has been resolved.

Overrides:

notifyPropertyResolved in class ELContext

Parameters:

base - The object on which the property was resolved

property - The property that was resolved

isLambdaArgument

public boolean isLambdaArgument(String name)

Description copied from class: ELContext

Determine if the specified name is recognised as the name of a lambda argument.

Overrides:

isLambdaArgument in class ELContext

Parameters:

name - The name of the lambda argument

Returns:

true if the name is recognised as the name of a lambda argument, otherwise false

getLambdaArgument

public Object getLambdaArgument(String name)

Description copied from class: ELContext

Obtain the value of the lambda argument with the given name.

Overrides:

getLambdaArgument in class ELContext

Parameters:

name - The name of the lambda argument

Returns:

The value of the specified argument

enterLambdaScope

public void enterLambdaScope(Map<String,Object> arguments)

Description copied from class: ELContext

Called when starting to evaluate a lambda expression so that the arguments are available to the EL context during evaluation.

Overrides:

enterLambdaScope in class ELContext

Parameters:

arguments - The arguments in scope for the current lambda expression.

exitLambdaScope

public void exitLambdaScope()

Description copied from class: ELContext

Called after evaluating a lambda expression to signal that the arguments are no longer required.

Overrides:

exitLambdaScope in class ELContext

convertToType

public Object convertToType(Object obj,
                   Class<?> type)

Description copied from class: ELContext

Coerce the supplied object to the requested type.

Overrides:

convertToType in class ELContext

Parameters:

obj - The object to be coerced

type - The type to which the object should be coerced

Returns:

An instance of the requested type.