Bug 150899 Cannot bind data values to chart series, which causes chart preview fail.
How to reproduce it? 1. Create a new chart, bind it with valid data set. 2. Assign the valid data values to category series and value series. Current result: 1. There is no chart live preview in chart builder. It still uses the default sample data. 2. Preview, dataset invalid exception is thrown out. Investigation: It is perhaps caused by ResultSetWrapper.java. There is no initializeMeta( ) in the Constructor.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/internal/datafeed/ResultSetWrapper.java
}
				}
				if ( bAllDone )
				{
					return;
				}
			}
		}
		logger.log( ILogger.WARNING,
				Messages.getString( "exception.resultset.data.type.retrieval.failed"  
				) );
	}
	/**
	 * Groups rows of data as specified in the grouping criteria for the series
	 * definition
	 * 
	 * @throws ChartException
	 */
	public void applyBaseSeriesGrouping( SeriesDefinition sd,
			String[] saExpressionKeys ) throws ChartException
	{
		
		if ( bBaseGroupingApplied )
		{
			return;
		}
		bBaseGroupingApplied = true;
		
		final SeriesGrouping sg = sd.getGrouping( );
		if ( sg == null || !sg.isEnabled( ) )