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* Copyright (c) 2005, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package javax.lang.model.element;
import javax.lang.model.UnknownEntityException;
/**
* Indicates that an unknown kind of module directive was encountered.
* This can occur if the language evolves and new kinds of directives are
* added to the {@code Directive} hierarchy. May be thrown by a
* {@linkplain ModuleElement.DirectiveVisitor directive 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 ModuleElement.DirectiveVisitor#visitUnknown
* @since 9
* @spec JPMS
*/
public class UnknownDirectiveException extends UnknownEntityException {
private static final long serialVersionUID = 269L;
private final transient ModuleElement.Directive directive;
private final 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 directive was
* encountered; for example, the visit methods of {@link
* ModuleElement.DirectiveVisitor DirectiveVisitor} may pass in
* their additional parameter.
*
* @param d the unknown directive, may be {@code null}
* @param p an additional parameter, may be {@code null}
*/
public UnknownDirectiveException(ModuleElement.Directive d, Object p) {
super("Unknown directive: " + d);
directive = d;
parameter = p;
}
/**
* Returns the unknown directive.
* The value may be unavailable if this exception has been
* serialized and then read back in.
*
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