Bug 122584 Cascading parameter values can't be displayed properly in html viewer.
Description: Cascading parameter values can't be displayed properly in html viewer. Steps to reproduce: 1. Preview attached design file in html viewer. 2. Click on "change parameter" button in html viewer. 3. Select the first parameter value and expect that the second parameter value in the same cascading parameter group could be displayed, but it is not displayed.
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
*            the String to be convert
	 * @param locate
	 * 			  the locate of the string
	 * @return result Date
	 */
	private static Date toDate( String source )
			throws BirtException
	{
		try
		{
			
			return toDate( source, Locale.getDefault( ) );
		}
		catch ( BirtException e )
		{
			
			return toDate( source, DEFAULT_LOCALE );
		}
	}
	/**
	 * Call org.eclipse.birt.core.format.DateFormatter
	 * @param source
	 * @return
	 */
	private static String toString( Date source, Locale locale )
	{
		DateFormatter df = new DateFormatter( locale );
		return df.format( (Date) source );
	}
}