Bug 123736 Underline, linethrough, overline doesn't work for chart font.
Description: Underline, linethrough, overline doesn't work for chart font. Steps to teproduce: 1. Add a style, set its font. 2. Tick "underline", "linethrough" and "overline". 3. Preview. Font setting doesn't work.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/factory/Generator.java
*/
	private static Generator g = null;
	private static ILogger logger = Logger.getLogger( "org.eclipse.birt.chart.engine/factory" ); 
	/**
	 * A private constructor.
	 */
	private Generator( )
	{
		implicitProcessor = SimpleProcessor.instance( );
	}
	/**
	 * Returns a singleton instance of the chart generator.
	 * 
	 * @return A singleton instance for the chart generator.
	 */
	public static synchronized final Generator instance( )
	{
		if ( g == null )
		{
			g = new Generator( );
		}
		return g;
	}
	/**
	 * Prepare all default styles for various StyledComponent.
	 * 
	 * @param model
	 * @param externalProcessor
	 */
	protected final void prepareStyles( Chart model,