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/* UnknownElementException.java -- Thrown by an unknown element.
Copyright (C) 2012 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package javax.lang.model.element;
/**
* Thrown when an unknown element is encountered,
* usually by a {@link ElementVisitor}.
*
* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
* @since 1.6
* @see ElementVisitor#visitUnknown(Element,P)
*/
public class UnknownElementException
extends RuntimeException
{
private static final long serialVersionUID = 269L;
/**
* The unknown element.
*/
private Element element;
/**
* The additional parameter.
*/
private Object param;
/**
* Constructs a new {@code UnknownElementException}
* for the specified element. An additional
* object may also be passed to give further context as
* to where the exception occurred, such as the additional parameter
* used by visitor classes.
*
* @param element the unknown element or {@code null}.
* @param param the additional parameter or {@code null}.
*/
public UnknownElementException(Element element, Object param)
{
super("The element " + element + " is not recognised,");
this.element = element;
this.param = param;
}
/**
* Returns the additional parameter or {@code null} if
* unavailable.
*
* @return the additional parameter.
*/
public Object getArgument()
{
return param;
}
/**
* Returns the unknown element or {@code null}
* if unavailable. The element may be {@code null} if
* the value is not {@link java.io.Serializable} but the
* exception has been serialized and read back in.
*
* @return the unknown element.
*/
public Element getUnknownElement()
{
return element;
}
}
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