Bug 145970 [REGRESSION] Set format in parameter dialog will lose the orginal data set by user.
Reproduce: 1. New a report scalar parameter, "p1", in the initialize dialog, set format to be uppercase. 2. New a data set with query "select * from CLASSICMODELS.CUSTOMERS where CLASSICMODELS.CUSTOMERS.CONTACTFIRSTNAME = ?". And bind the data set parameter to the report parameter "p1". 3. Insert a table into layout view, drag column [CUSTOMERNUMBER], [CONTACTLASTNAME], [CONTACTFIRSTNAME] from Data Explorer into table detail row respectively. 4. Preview. In the pop-up parameter dialog, type "Eric". Press "ok". Actually result: There was no data displayed. Expected result: There is one record whose first name is "Eric" in database.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
if ( model != null )
			return model.getFlattenParameters( );
		else
			return null;
	}
	/**
	 * @return the parameter handle
	 */
	public ParameterHandle findParameter( String paramName )
			throws ReportServiceException
	{
		if ( paramName == null )
			return null;
		IReportRunnable runnable = (IReportRunnable) this.reportDesignHandle
				.getDesignObject( );
		ModuleHandle model = null;
		if ( runnable != null )
			model = runnable.getDesignHandle( ).getModuleHandle( );
		if ( model != null )
			return model.findParameter( paramName );
		else
			return null;
	}
	/**
	 * @return the maxRows
	 */
	public int getMaxRows( )
	{
		return maxRows;
	}