/**
* @return <code>false</code> if sub-expression represented the specified ParseNode definitely
* cannot appear on either side of the range (':') operator
*/
private static boolean isValidRangeOperand(ParseNode a) {
Ptg tkn = a.getToken();
// Note - order is important for these instance-of checks
if (tkn instanceof OperandPtg) {
// notably cell refs and area refs
return true;
}
// next 2 are special cases of OperationPtg
if (tkn instanceof AbstractFunctionPtg) {
AbstractFunctionPtg afp = (AbstractFunctionPtg) tkn;
byte returnClass = afp.getDefaultOperandClass();
return Ptg.CLASS_REF == returnClass;
}
if (tkn instanceof ValueOperatorPtg) {
return false;
}
if (tkn instanceof OperationPtg) {
return true;
}
// one special case of ControlPtg
if (tkn instanceof ParenthesisPtg) {
// parenthesis Ptg should have only one child
return isValidRangeOperand(a.getChildren()[0]);
}
// one special case of ScalarConstantPtg
if (tkn == ErrPtg.REF_INVALID) {
return true;
}
// All other ControlPtgs and ScalarConstantPtgs cannot be used with ':'
return false;
}
private static boolean isSimpleValueFunction(Ptg token) {
if (token instanceof AbstractFunctionPtg) {
AbstractFunctionPtg aptg = (AbstractFunctionPtg) token;
if (aptg.getDefaultOperandClass() != Ptg.CLASS_VALUE) {
return false;
}
int numberOfOperands = aptg.getNumberOfOperands();
for (int i = numberOfOperands - 1; i >= 0; i--) {
if (aptg.getParameterClass(i) != Ptg.CLASS_VALUE) {
return false;
}
}
return true;
}
return false;
}
private void transformFunctionNode(
AbstractFunctionPtg afp,
ParseNode[] children,
byte desiredOperandClass,
boolean callerForceArrayFlag) {
boolean localForceArrayFlag;
byte defaultReturnOperandClass = afp.getDefaultOperandClass();
if (callerForceArrayFlag) {
switch (defaultReturnOperandClass) {
case Ptg.CLASS_REF:
if (desiredOperandClass == Ptg.CLASS_REF) {
afp.setClass(Ptg.CLASS_REF);
} else {
afp.setClass(Ptg.CLASS_ARRAY);
}
localForceArrayFlag = false;
break;
case Ptg.CLASS_ARRAY:
afp.setClass(Ptg.CLASS_ARRAY);
localForceArrayFlag = false;
break;
case Ptg.CLASS_VALUE:
afp.setClass(Ptg.CLASS_ARRAY);
localForceArrayFlag = true;
break;
default:
throw new IllegalStateException(
"Unexpected operand class (" + defaultReturnOperandClass + ")");
}
} else {
if (defaultReturnOperandClass == desiredOperandClass) {
localForceArrayFlag = false;
// an alternative would have been to for non-base Ptgs to set their operand class
// from their default, but this would require the call in many subclasses because
// the default OC is not known until the end of the constructor
afp.setClass(defaultReturnOperandClass);
} else {
switch (desiredOperandClass) {
case Ptg.CLASS_VALUE:
// always OK to set functions to return 'value'
afp.setClass(Ptg.CLASS_VALUE);
localForceArrayFlag = false;
break;
case Ptg.CLASS_ARRAY:
switch (defaultReturnOperandClass) {
case Ptg.CLASS_REF:
afp.setClass(Ptg.CLASS_REF);
// afp.setClass(Ptg.CLASS_ARRAY);
break;
case Ptg.CLASS_VALUE:
afp.setClass(Ptg.CLASS_ARRAY);
break;
default:
throw new IllegalStateException(
"Unexpected operand class (" + defaultReturnOperandClass + ")");
}
localForceArrayFlag = (defaultReturnOperandClass == Ptg.CLASS_VALUE);
break;
case Ptg.CLASS_REF:
switch (defaultReturnOperandClass) {
case Ptg.CLASS_ARRAY:
afp.setClass(Ptg.CLASS_ARRAY);
break;
case Ptg.CLASS_VALUE:
afp.setClass(Ptg.CLASS_VALUE);
break;
default:
throw new IllegalStateException(
"Unexpected operand class (" + defaultReturnOperandClass + ")");
}
localForceArrayFlag = false;
break;
default:
throw new IllegalStateException(
"Unexpected operand class (" + desiredOperandClass + ")");
}
}
}
for (int i = 0; i < children.length; i++) {
ParseNode child = children[i];
byte paramOperandClass = afp.getParameterClass(i);
transformNode(child, paramOperandClass, localForceArrayFlag);
}
}