UnknownAnnotationValueException (Java SE 22 & JDK 22)
Description: declaration: module: java.compiler, package: javax.lang.model.element, class: UnknownAnnotationValueException
Keywords: javax.lang.model.element.UnknownAnnotationValueException class

Module java.compiler
Package javax.lang.model.element

# Class UnknownAnnotationValueException

java.lang.Object
java.lang.Throwable
java.lang.Exception
java.lang.RuntimeException
javax.lang.model.UnknownEntityException
javax.lang.model.element.UnknownAnnotationValueException

All Implemented Interfaces:
  `Serializable`

public class UnknownAnnotationValueException extends UnknownEntityException
Indicates that an unknown kind of annotation value was encountered. This can occur if the language evolves and new kinds of annotation values can be stored in an annotation. May be thrown by an annotation value visitor to indicate that the visitor was created for a prior version of the language.

Since:
  1.6
See Also:
  - `AnnotationValueVisitor.visitUnknown(javax.lang.model.element.AnnotationValue, P)`
  - Serialized Form

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `UnknownAnnotationValueException(AnnotationValue av, Object p)`
  Creates a new `UnknownAnnotationValueException`.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `Object`
  `getArgument()`
  Returns the additional argument.
  `AnnotationValue`
  `getUnknownAnnotationValue()`
  Returns the unknown annotation value.

  ### Methods declared in class java.lang.Throwable

  `addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString`

  ### Methods declared in class java.lang.Object

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

- ## Constructor Details

  - ### UnknownAnnotationValueException

    public UnknownAnnotationValueException(AnnotationValue av, Object p)
    Creates a new `UnknownAnnotationValueException`. The `p` parameter may be used to pass in an additional argument with information about the context in which the unknown annotation value was encountered; for example, the visit methods of `AnnotationValueVisitor` may pass in their additional parameter.
    Parameters:
      `av` - the unknown annotation value, may be `null`
      `p` - an additional parameter, may be `null`

- ## Method Details

  - ### getUnknownAnnotationValue

    public AnnotationValue getUnknownAnnotationValue()
    Returns the unknown annotation value. The value may be unavailable if this exception has been serialized and then read back in.
    Returns:
      the unknown element, or `null` if unavailable

  - ### getArgument

    public Object getArgument()
    Returns the additional argument.
    Returns:
      the additional argument, or `null` if unavailable