Package jakarta.el
Class ELContext
java.lang.Object
jakarta.el.ELContext
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoidaddEvaluationListener(EvaluationListener listener) Register an EvaluationListener with this ELContext.<T> TconvertToType(Object obj, Class<T> type) Coerce the supplied object to the requested type.voidenterLambdaScope(Map<String, Object> arguments) Called when starting to evaluate a lambda expression so that the arguments are available to the EL context during evaluation.voidCalled after evaluating a lambda expression to signal that the arguments are no longer required.getContext(Class<?> key) Obtain the context object for the given key.abstract ELResolverObtain the list of registered EvaluationListeners.abstract FunctionMapperObtain the ImportHandler for this ELContext, creating one if necessary.getLambdaArgument(String name) Obtain the value of the lambda argument with the given name.abstract VariableMapperbooleanisLambdaArgument(String name) Determine if the specified name is recognised as the name of a lambda argument.booleanvoidnotifyAfterEvaluation(String expression) Notify interested listeners that an expression has been evaluated.voidnotifyBeforeEvaluation(String expression) Notify interested listeners that an expression will be evaluated.voidnotifyPropertyResolved(Object base, Object property) Notify interested listeners that a property has been resolved.voidputContext(Class<?> key, Object contextObject) Add an object to this EL context under the given key.voidvoidsetPropertyResolved(boolean resolved) voidsetPropertyResolved(Object base, Object property) Mark the given property as resolved and notify any interested listeners.
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Constructor Details
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ELContext
public ELContext()
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Method Details
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setPropertyResolved
public void setPropertyResolved(boolean resolved) -
setPropertyResolved
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isPropertyResolved
public boolean isPropertyResolved() -
putContext
Add an object to this EL context under the given key.- Parameters:
key- The key under which to store the objectcontextObject- The object to add- Throws:
NullPointerException- If the supplied key or context isnull
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getContext
Obtain the context object for the given key.- Parameters:
key- The key of the required context object- Returns:
- The value of the context object associated with the given key
- Throws:
NullPointerException- If the supplied key isnull
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getELResolver
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getImportHandler
Obtain the ImportHandler for this ELContext, creating one if necessary. This method is not thread-safe.- Returns:
- the ImportHandler for this ELContext.
- Since:
- EL 3.0
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getFunctionMapper
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getLocale
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setLocale
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getVariableMapper
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addEvaluationListener
Register an EvaluationListener with this ELContext.- Parameters:
listener- The EvaluationListener to register- Since:
- EL 3.0
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getEvaluationListeners
Obtain the list of registered EvaluationListeners.- Returns:
- A list of the EvaluationListener registered with this ELContext
- Since:
- EL 3.0
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notifyBeforeEvaluation
Notify interested listeners that an expression will be evaluated.- Parameters:
expression- The expression that will be evaluated- Since:
- EL 3.0
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notifyAfterEvaluation
Notify interested listeners that an expression has been evaluated.- Parameters:
expression- The expression that was evaluated- Since:
- EL 3.0
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notifyPropertyResolved
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isLambdaArgument
Determine if the specified name is recognised as the name of a lambda argument.- Parameters:
name- The name of the lambda argument- Returns:
trueif the name is recognised as the name of a lambda argument, otherwisefalse- Since:
- EL 3.0
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getLambdaArgument
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enterLambdaScope
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exitLambdaScope
public void exitLambdaScope()Called after evaluating a lambda expression to signal that the arguments are no longer required.- Since:
- EL 3.0
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convertToType
Coerce the supplied object to the requested type.- Type Parameters:
T- The type to which the object should be coerced- Parameters:
obj- The object to be coercedtype- The type to which the object should be coerced- Returns:
- An instance of the requested type.
- Throws:
ELException- If the conversion fails- Since:
- EL 3.0
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