Class 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 Detail

      • 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 Detail

      • 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