Package javax.el

Class ELContext

java.lang.Object
javax.el.ELContext
Direct Known Subclasses:
StandardELContext
public abstract class ELContext extends Object

  • Constructor Details

    • ELContext

      public ELContext()

  • Method Details

    • setPropertyResolved

      public void setPropertyResolved(boolean resolved)

    • setPropertyResolved

      public void setPropertyResolved(Object base, Object property)
      Mark the given property as resolved and notify any interested listeners.
      Parameters:
      base - The base object on which the property was found
      property - The property that was resolved
      Since:
      EL 3.0

    • isPropertyResolved

      public boolean isPropertyResolved()

    • putContext

      public void putContext(Class key, Object contextObject)
      Add an object to this EL context under the given key.
      Parameters:
      key - The key under which to store the object
      contextObject - The object to add
      Throws:
      NullPointerException - If the supplied key or context is null

    • getContext

      public Object getContext(Class key)
      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 is null

    • getELResolver

      public abstract ELResolver getELResolver()

    • getImportHandler

      public ImportHandler 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

    • getFunctionMapper

      public abstract FunctionMapper getFunctionMapper()

    • getLocale

      public Locale getLocale()

    • setLocale

      public void setLocale(Locale locale)

    • getVariableMapper

      public abstract VariableMapper getVariableMapper()

    • addEvaluationListener

      public void addEvaluationListener(EvaluationListener listener)
      Register an EvaluationListener with this ELContext.
      Parameters:
      listener - The EvaluationListener to register
      Since:
      EL 3.0

    • getEvaluationListeners

      public List<EvaluationListener> getEvaluationListeners()
      Obtain the list of registered EvaluationListeners.
      Returns:
      A list of the EvaluationListener registered with this ELContext
      Since:
      EL 3.0

    • notifyBeforeEvaluation

      public void notifyBeforeEvaluation(String expression)
      Notify interested listeners that an expression will be evaluated.
      Parameters:
      expression - The expression that will be evaluated
      Since:
      EL 3.0

    • notifyAfterEvaluation

      public void notifyAfterEvaluation(String expression)
      Notify interested listeners that an expression has been evaluated.
      Parameters:
      expression - The expression that was evaluated
      Since:
      EL 3.0

    • notifyPropertyResolved

      public void notifyPropertyResolved(Object base, Object property)
      Notify interested listeners that a property has been resolved.
      Parameters:
      base - The object on which the property was resolved
      property - The property that was resolved
      Since:
      EL 3.0

    • isLambdaArgument

      public boolean isLambdaArgument(String name)
      Determine if the specified name is recognised as the name of a lambda argument.
      Parameters:
      name - The name of the lambda argument
      Returns:
      true if the name is recognised as the name of a lambda argument, otherwise false
      Since:
      EL 3.0

    • getLambdaArgument

      public Object getLambdaArgument(String name)
      Obtain the value of the lambda argument with the given name.
      Parameters:
      name - The name of the lambda argument
      Returns:
      The value of the specified argument
      Since:
      EL 3.0

    • enterLambdaScope

      public 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.
      Parameters:
      arguments - The arguments in scope for the current lambda expression.
      Since:
      EL 3.0

    • exitLambdaScope

      public void exitLambdaScope()
      Called after evaluating a lambda expression to signal that the arguments are no longer required.
      Since:
      EL 3.0

    • convertToType

      public Object convertToType(Object obj, Class<?> type)
      Coerce the supplied object to the requested type.
      Parameters:
      obj - The object to be coerced
      type - 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