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diff --git a/javax/lang/model/element/UnknownAnnotationValueException.java b/javax/lang/model/element/UnknownAnnotationValueException.java
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+/* UnknownAnnotationValueException.java -- Thrown by an unknown annotation value.
+   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 annotation value is encountered,
+ * usually by a {@link AnnotationValueVisitor}.
+ *
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @since 1.6
+ * @see AnnotationValueVisitor#visitUnknown(AnnotationValue,P)
+ */
+public class UnknownAnnotationValueException
+  extends RuntimeException
+{
+
+  private static final long serialVersionUID = 269L;
+
+  /**
+   * The unknown annotation value.
+   */
+  private AnnotationValue annValue;
+
+  /**
+   * The additional parameter.
+   */
+  private Object param;
+
+  /**
+   * Constructs a new {@code UnknownAnnotationValueException}
+   * for the specified annotation value.  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 annValue the unknown annotation value or {@code null}.
+   * @param param the additional parameter or {@code null}.
+   */
+  public UnknownAnnotationValueException(AnnotationValue annValue,
+					 Object param)
+  {
+    this.annValue = annValue;
+    this.param = param;
+  }
+
+  /**
+   * Returns the additional parameter or {@code null} if
+   * unavailable.
+   *
+   * @return the additional parameter.
+   */
+  public Object getArgument()
+  {
+    return param;
+  }
+
+  /**
+   * Returns the unknown annotation value or {@code null}
+   * if unavailable.  The value 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 annotation value.
+   */
+  public AnnotationValue getUnknownAnnotationValue()
+  {
+    return annValue;
+  }
+
+
+}