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/*
 * Copyright 2005-2006 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package javax.lang.model.type;

/**
 * Indicates that an unknown kind of type was encountered.  This can
 * occur if the language evolves and new kinds of types are added to
 * the {@code TypeMirror} hierarchy.  May be thrown by a {@linkplain
 * TypeVisitor type 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
 * @version 1.9 07/05/05
 * @see TypeVisitor#visitUnknown
 * @since 1.6
 */
public class UnknownTypeException extends RuntimeException {

    private static final long serialVersionUID = 269L;

    private transient TypeMirror type;
    private transient Object parameter;

    /**
     * Creates a new {@code UnknownTypeException}.The {@code p}
     * parameter may be used to pass in an additional argument with
     * information about the context in which the unknown type was
     * encountered; for example, the visit methods of {@link
     * TypeVisitor} may pass in their additional parameter.
     *
     * @param t the unknown type, may be {@code null}
     * @param p an additional parameter, may be {@code null}
     */
    public UnknownTypeException(TypeMirror t, Object p) {
  super("Unknown type: " + t);
  type = t;
  this.parameter = p;
    }

    /**
     * Returns the unknown type.
     * The value may be unavailable if this exception has been
     * serialized and then read back in.
     *
     * @return the unknown type, or {@code null} if unavailable
     */
    public TypeMirror getUnknownType() {
  return type;
    }

    /**
     * Returns the additional argument.
     *
     * @return the additional argument
     */
    public Object getArgument() {
  return parameter;
    }
}
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