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
public int getGroupCount( )
	{
		return iaGroupBreaks.length + 1;
	}
	/**
	 * Returns the row count in specified group.
	 * 
	 * @param iGroupIndex
	 * @return
	 */
	public int getGroupRowCount( int iGroupIndex )
	{
		int startRow = ( iGroupIndex <= 0 ) ? 0
				: iaGroupBreaks[iGroupIndex - 1];
		int endRow = ( iGroupIndex > iaGroupBreaks.length - 1 ) ? getRowCount( )
				: iaGroupBreaks[iGroupIndex];
		return endRow - startRow;
	}
	/**
	 * Returns a pre-computed column count associated with the resultset wrapper
	 * instance
	 * 
	 * @return A pre-computed column count associated with the resultset wrapper
	 *         instance
	 */
	public int getColumnCount( )
	{
		return saExpressionKeys.length;
	}
	/**