public void applyColumnFilter(String column, ChangeValue changeValue) throws Exception {
		for (String row : rowLookup.keySet()) {
			String oldValue = this.getCell(row, column);
			String newValue = changeValue.change(oldValue);
			this.addCell(row, column, newValue);
		}
	}
public void applyColumnFilter ( String column , ChangeValue changeValue ) throws Exception { for ( String row : rowLookup . keySet ( ) ) { String oldValue = this . getCell ( row , column ) ; String newValue = changeValue . change ( oldValue ) ; this . addCell ( row , column , newValue ) ; } }
Apply filter to a column to change values from say numberic to nominal
based on some range

@param column
@param changeValue
@throws Exception