src/org/tiefaces/components/websheet/utility/ShiftFormulaUtility.java
private static Ptg[] convertPtg(final Ptg[] ptgs, final int position,
			final ShiftFormulaRef shiftFormulaRef, final Object ptg) {

		byte originalOperandClass = -1;

		if (!((Ptg) ptg).isBaseToken()) {
			originalOperandClass = ((Ptg) ptg).getPtgClass();
		}

		int currentRow;
		currentRow = getFirstSupportedRowNumFromPtg(ptg);
		if ((currentRow >= 0)
				&& shiftFormulaRef.getWatchList().contains(currentRow)) {
			return convertPtgForWatchList(ptgs, position, shiftFormulaRef,
					ptg, originalOperandClass, currentRow);

		}
		// no need change ptg
		if ((ptg instanceof AttrPtg)
				&& (shiftFormulaRef.getFormulaChanged() > 1)) {
			AttrPtg newPtg = (AttrPtg) ptg;
			if (newPtg.isSum()) {
				FuncVarPtg fptg = FuncVarPtg.create("sum",
						shiftFormulaRef.getFormulaChanged());
				return singlePtg(fptg, fptg.getPtgClass(),
						shiftFormulaRef.getFormulaChanged());
			}
		}
		return singlePtg(ptg, originalOperandClass,
				shiftFormulaRef.getFormulaChanged());

	}
private static Ptg[] convertPtg(final Ptg[] ptgs, final int position,
			final ShiftFormulaRef shiftFormulaRef, final Object ptg) {

		byte originalOperandClass = -1;

		if (!((Ptg) ptg).isBaseToken()) {
			originalOperandClass = ((Ptg) ptg).getPtgClass();
		}

		int currentRow;
		currentRow = getFirstSupportedRowNumFromPtg(ptg);
		if ((currentRow >= 0)
				&& shiftFormulaRef.getWatchList().contains(currentRow)) {
			return convertPtgForWatchList(ptgs, position, shiftFormulaRef,
					ptg, originalOperandClass, currentRow);

		}
		// no need change ptg
		if ((ptg instanceof AttrPtg)
				&& (shiftFormulaRef.getFormulaChanged() > 1)) {
			AttrPtg newPtg = (AttrPtg) ptg;
			if (newPtg.isSum()) {
				FuncVarPtg fptg = FuncVarPtg.create("sum",
						shiftFormulaRef.getFormulaChanged());
				return singlePtg(fptg, fptg.getPtgClass(),
						shiftFormulaRef.getFormulaChanged());
			}
		}
		return singlePtg(ptg, originalOperandClass,
				shiftFormulaRef.getFormulaChanged());

	}
Convert ptg.

@param ptgs
the ptgs
@param position
the position
@param shiftFormulaRef
the shift formula ref
@param ptg
the ptg
@return the ptg[]