Bug 139365 The result of grouping is wrong
Description: The result of grouping is wrong. Step to reproduce: Steps to reproduce: 1. New a report. 2. Create a data source and a data set based on the report. 3. Drag the dataset to the layout, and set two groups on the table. The first level group information: Group key: CITY Interval type: prefix Range: 1 The second level group information: Group key: CUSTOMERNUMBER Interval type: Interval Range: 4 4. Save and preview. (Please refer to the attached design file) Actual result: The result of grouping is wrong. Expected result: In the second level group, the CUSTOMERNUMBER 157, 303, 357, 323 shouldnt in a group. They must be regard as single group according to the conditional of the second level group.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/group/GroupBy.java
*/
	int getColumnIndex( )
	{
		return columnIndex;
	}
	
	String getColumnName( )
	{
		return columnName;
	}
	/**
	 * Gets the GroupSpec associated with this group by
	 */
	GroupSpec getGroupSpec( )
	{
		return groupSpec;
	}
	private static boolean isNumber( Class columnType )
	{
		return Number.class.isAssignableFrom( columnType );
	}
	private static boolean isString( Class columnType )
	{
		return String.class.isAssignableFrom( columnType );
	}
	private static boolean isDate( Class columnType )
	{
		return Date.class.isAssignableFrom( columnType );
	}
}