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
title = BirtResources
					.getString( ResourceConstants.BIRT_VIEWER_TITLE );
		}
		this.reportTitle = ParameterAccessor.htmlEncode( title );
		this.__initParameters( request );
	}
	/*
	 * Prepare the report parameters
	 */
	protected void __initParameters( HttpServletRequest request )
			throws Exception
	{
		this.reportDesignHandle = getDesignHandle( request );
		InputOptions options = new InputOptions( );
		options.setOption( InputOptions.OPT_REQUEST, request );
		options.setOption( InputOptions.OPT_LOCALE, locale );
		options.setOption( InputOptions.OPT_RTL, new Boolean( rtl ) );
		
		Collection parameterList = getParameterList( );
		
		if ( this.isDesigner
				&& !IBirtConstants.SERVLET_PATH_FRAMESET
						.equalsIgnoreCase( request.getServletPath( ) ) )
			parseConfigVars( request, parameterList );
		
		this.parametersAsString = getParsedParametersAsString( parameterList,
				request, options );
		
		Collection parameterDefList = getReportService( )
				.getParameterDefinitions( this.reportDesignHandle, options,