Bug 208190 [Regression]A blank column occurs when export report to excel file[1203]
Description: Export report to excel file, a blank column is created on the front of the columns exported. Build version:2.3.0.v20071031-0800 Steps to reproduce: 1.Create a sample datasource and dataset. 2.Pull the dataset to the report layout,and add a group on the table. 3.Preview in web viewer, export the report to excel file, a blank column is created as the first column.
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/layout/ExcelLayoutEngine.java
container.setStart( pos );
		containers.push( container );
	}
	public void endContainer( )
	{
		XlsContainer container = getCurrentContainer( );
		
		if ( container.isEmpty( ) )
		{
			Data data = new Data( EMPTY, container.getStyle( ), Data.STRING );
			data.setRule( container.getRule( ) );
			addData( data );
		}
		engine.removeContainerStyle( );
		containers.pop( );
	}
	public void addData( Object txt, IStyle style, HyperlinkDef link )
	{
		Rule rule = getCurrentContainer( ).getRule( );
		StyleEntry entry = engine.getStyle( style, rule );
		Data data = createData(txt, entry);
		data.setHyperlinkDef( link );
		data.setRule( rule );
		addData( data );
	}
	
	public void addCaption(String text) {
		Rule rule = getCurrentContainer( ).getRule( );
		StyleEntry entry = StyleBuilder.createEmptyStyleEntry( );
		entry.setProperty( StyleEntry.H_ALIGN_PROP, "Center" );