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
{
				bAllDone = true;
				if ( oaTuple[i] == null )
				{
					continue;
				}
				boaFound[i] = true;
				if ( oaTuple[i] instanceof Number ) 
				
				{
					iaDataTypes[i] = IConstants.NUMERICAL;
				}
				else if ( oaTuple[i] instanceof String ) 
				
				{
					iaDataTypes[i] = IConstants.TEXT;
				}
				else if ( oaTuple[i] instanceof Date
						|| oaTuple[i] instanceof Calendar ) 
				
				
				{
					iaDataTypes[i] = IConstants.DATE_TIME;
				}
				for ( int j = 0; j < iColumnCount; j++ )
				{
					if ( !boaFound[j] )
					{
						bAllDone = false;
						break;