assertionfailedexception.java

一个网上书店程序!实现网上购书结算等！ 由jsp+javabean+mysql组成！ 功能很完善

/*
   Copyright (C) 2002 MySQL AB

      This program 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 of the License, or
      (at your option) any later version.

      This program 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 this program; if not, write to the Free Software
      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */
package com.mysql.jdbc;


/**
 * Assertions for empty code paths that should never be
 * executed.
 *
 * @author Mark Matthews
 *
 * @version $Id: AssertionFailedException.java,v 1.1.2.3 2003/02/09 18:14:28 mmatthew Exp $
 */
public class AssertionFailedException extends RuntimeException {
    /**
     * Creates an AssertionFailedException for the given exception
     * that should never have been thrown.
     *
     * @param ex the exception that should never have been thrown.
     */
    public AssertionFailedException(Exception ex) {
        super("ASSERT FAILS: Exception " + ex.toString()
            + " that should not be thrown, was thrown");
    }

    /**
     * Convenience method.
     *
     * @param ex the exception that should never have been thrown.
     * @throws AssertionFailedException for the exception ex.
     */
    public static void shouldNotHappen(Exception ex)
        throws AssertionFailedException {
        throw new AssertionFailedException(ex);
    }
}