Bug 112287 It's better to transfer to "new data source" dialog when creating a new data set without existing data source.
Description: It's better to transfer to "new data source" dialog automatically when creating a new data set without existing data source. Steps to reproduce: 1. There is no existing data source. 2. Create a new data set. 3. It pops up hint message, saying that "there is no data source". Actual result: it's better to transfer to "new data source" dialog box now and help users create a new data source.
chart/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/ReportDataServiceProvider.java
ExtendedItemFilterDialog page = new ExtendedItemFilterDialog( itemHandle,
				this );
		return page.open( );
	}
	protected int invokeEditParameter( )
	{
		ReportItemParametersDialog page = new ReportItemParametersDialog( itemHandle );
		return page.open( );
	}
	protected int invokeDataBinding( )
	{
		Shell shell = new Shell( Display.getDefault( ), SWT.DIALOG_TRIM
				| SWT.RESIZE | SWT.APPLICATION_MODAL );
		
		
		
		
		ColumnBindingDialog page = new ChartColumnBindingDialog( shell );
		page.setInput( itemHandle );
		
		ExpressionProvider ep = new ExpressionProvider( itemHandle );
		ep.addFilter( new ExpressionFilter( ) {
			public boolean select( Object parentElement, Object element )
			{
				
				return !( parentElement.equals( ExpressionProvider.BIRT_OBJECTS )
						&& element instanceof IClassInfo && ( (IClassInfo) element ).getName( )
						.equals( "Total" ) ); 
			}
		} );