code: /*
   * Copyright (c) 1996, 2004, 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.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package java.lang.reflect;
  
  /**
   * InvocationTargetException is a checked exception that wraps
   * an exception thrown by an invoked method or constructor.
   *
   * <p>As of release 1.4, this exception has been retrofitted to conform to
   * the general purpose exception-chaining mechanism.  The "target exception"
   * that is provided at construction time and accessed via the
   * {@link #getTargetException()} method is now known as the <i>cause</i>,
   * and may be accessed via the {@link Throwable#getCause()} method,
   * as well as the aforementioned "legacy method."
   *
   * @see Method
   * @see Constructor
   */
  public class InvocationTargetException extends ReflectiveOperationException {
      /**
       * Use serialVersionUID from JDK 1.1.X for interoperability
       */
      private static final long serialVersionUID = 4085088731926701167L;
  
       /**
       * This field holds the target if the
       * InvocationTargetException(Throwable target) constructor was
       * used to instantiate the object
       *
       * @serial
       *
       */
      private Throwable target;
  
      /**
       * Constructs an {@code InvocationTargetException} with
       * {@code null} as the target exception.
       */
      protected InvocationTargetException() {
          super((Throwable)null);  // Disallow initCause
      }
  
      /**
       * Constructs a InvocationTargetException with a target exception.
       *
       * @param target the target exception
       */
      public InvocationTargetException(Throwable target) {
          super((Throwable)null);  // Disallow initCause
          this.target = target;
      }
  
      /**
       * Constructs a InvocationTargetException with a target exception
       * and a detail message.
       *
       * @param target the target exception
       * @param s      the detail message
       */
      public InvocationTargetException(Throwable target, String s) {
          super(s, null);  // Disallow initCause
          this.target = target;
      }
  
      /**
       * Get the thrown target exception.
       *
       * <p>This method predates the general-purpose exception chaining facility.
       * The {@link Throwable#getCause()} method is now the preferred means of
       * obtaining this information.
       *
       * @return the thrown target exception (cause of this exception).
       */
      public Throwable getTargetException() {
          return target;
      }
  
      /**
       * Returns the cause of this exception (the thrown target exception,
       * which may be {@code null}).
       *
       * @return  the cause of this exception.
       * @since   1.4
       */
      public Throwable getCause() {
          return target;
      }
  
      // DIFFBLUE MODEL LIBRARY
      // While Object.getClass() is not modelled, we can get the same
      // functionality by adding one toString() method per subclass of
      // Throwable.
      @Override
      public String toString() {
          String message = getLocalizedMessage();
          return (message != null)
              ? ("java.lang.reflect.InvocationTargetException: " + message)
              : "java.lang.reflect.InvocationTargetException";
      }
  }
  