File	Doc	Category	Size	Date	Package
SubtractEval.java	API Doc	Apache Poi 3.0.1	3467	Sun Mar 11 12:59:28 GMT 2007	org.apache.poi.hssf.record.formula.eval

SubtractEval

• java.lang.Object
  • NumericOperationEval

Fields Summary
private SubtractPtg	delegate
private static final ValueEvalToNumericXlator	NUM_XLATOR

Constructors Summary
public SubtractEval(Ptg ptg) delegate = (SubtractPtg) ptg;

Methods Summary
public Eval	evaluate(Eval[] operands, int srcRow, short srcCol) Eval retval = null; double d0 = 0; double d1 = 0; switch (operands.length) { default: // will rarely happen. currently the parser itself fails. retval = ErrorEval.UNKNOWN_ERROR; break; case 2: ValueEval ve = singleOperandEvaluate(operands[0], srcRow, srcCol); if (ve instanceof NumericValueEval) { d0 = ((NumericValueEval) ve).getNumberValue(); } else if (ve instanceof BlankEval) { // do nothing } else { retval = ErrorEval.VALUE_INVALID; } if (retval == null) { // no error yet ve = singleOperandEvaluate(operands[1], srcRow, srcCol); if (ve instanceof NumericValueEval) { d1 = ((NumericValueEval) ve).getNumberValue(); } else if (ve instanceof BlankEval) { // do nothing } else { retval = ErrorEval.VALUE_INVALID; } } } // end switch if (retval == null) { retval = (Double.isNaN(d0) || Double.isNaN(d1)) ? (ValueEval) ErrorEval.VALUE_INVALID : new NumberEval(d0 - d1); } return retval;
public int	getNumberOfOperands() return delegate.getNumberOfOperands();
public int	getType() return delegate.getType();
protected ValueEvalToNumericXlator	getXlator() return NUM_XLATOR;