/*
* Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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package javax.lang.model.element;
import javax.lang.model.UnknownEntityException;
/**
* Indicates that an unknown kind of element was encountered. This
* can occur if the language evolves and new kinds of elements are
* added to the {@code Element} hierarchy. May be thrown by an
* {@linkplain ElementVisitor element visitor} to indicate that the
* visitor was created for a prior version of the language.
*
* @author Joseph D. Darcy
* @author Scott Seligman
* @author Peter von der Ahé
* @see ElementVisitor#visitUnknown
* @since 1.6
*/
public class UnknownElementException extends UnknownEntityException {
private static final long serialVersionUID = 269L;
private transient Element element;
private transient Object parameter;
/**
* Creates a new {@code UnknownElementException}. The {@code 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 {@link
* ElementVisitor} may pass in their additional parameter.
*
* @param e the unknown element, may be {@code null}
* @param p an additional parameter, may be {@code null}
*/
public UnknownElementException(Element e, Object p) {
super("Unknown element: " + e);
element = e;
this.parameter = p;
}
/**
* Returns the unknown element.
* The value may be unavailable if this exception has been
* serialized and then read back in.
*
* @return the unknown element, or {@code null} if unavailable
*/
public Element getUnknownElement() {
return element;
}
/**
* Returns the additional argument.
*
* @return the additional argument
*/
public Object getArgument() {
return parameter;
}
}