Bug 322347 Refactor data set editor pages' codes[29949]
Build Identifier: 20100810 Refactor data set editor pages' codes. Reproducible: Always
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/util/DataSetProvider.java
if ( columns == null || refresh )
			{
				columns = this.populateAllOutputColumns( dataSet, session );
				htColumns.put( dataSet, columns );
			}
			session.shutdown( );
		}
		catch ( BirtException e )
		{
			if ( !suppressErrorMessage )
			{
				ExceptionHandler.handle( e );
			}
			columns = null;
		}
		
		
		if ( columns == null )
		{
			columns = new DataSetViewData[]{};
			
			htColumns.put( dataSet, columns );
		}
		return columns;
	}
	/**
	 * populate all output columns in viewer display. The output columns is
	 * retrieved from oda dataset handles's RESULT_SET_PROP and
	 * COMPUTED_COLUMNS_PROP.
	 *