Class UnknownTreeException

java.lang.Object

java.lang.Throwable

java.lang.Exception

java.lang.RuntimeException

org.openjdk.nashorn.api.tree.UnknownTreeException

All Implemented Interfaces:

Serializable

public class UnknownTreeException
extends RuntimeException

Indicates that an unknown kind of Tree was encountered. This can occur if the language evolves and new kinds of Trees are added to the Tree hierarchy. May be thrown by a tree visitor to indicate that the visitor was created for a prior version of the language.

Since:

9

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
UnknownTreeException(Tree t, Object p)	Creates a new UnknownTreeException.

Method Summary

Modifier and Type	Method	Description
Object	getArgument()	Returns the additional argument.
Tree	getUnknownTree()	Returns the unknown tree.

Methods inherited from class Throwable

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

Methods inherited from class Object

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

Constructor Details

UnknownTreeException

public UnknownTreeException(Tree t,
 Object p)

Creates a new UnknownTreeException. The p parameter may be used to pass in an additional argument with information about the context in which the unknown element was encountered; for example, the visit methods of TreeVisitor may pass in their additional parameter.

Parameters:

t - the unknown tree, may be null

p - an additional parameter, may be null

Method Details

getUnknownTree

public Tree getUnknownTree()

Returns the unknown tree. 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. The value may be unavailable if this exception has been serialized and then read back in.

Returns:

the additional argument