/**
* The value of this beed is recalculated. This is done by iterating over the arguments. When
* there are no terms, the result is equal to {@link #initialValue()}. When one of the terms is
* null, the result is null. When all terms are effective, the result is dependent on the specific
* subclass.
*/
private final void recalculate() {
$value = initialValue();
for (RealBeed<?> argument : $arguments) {
if (!argument.isEffective()) {
assignEffective(false);
return;
}
$value = operation($value, argument.getdouble());
}
assignEffective(true);
}
/**
* @pre argument != null;
* @post new.getNbOccurrences(argument) == getNbOccurrences(argument) + 1;
*/
public final void addArgument(RealBeed<?> argument) {
assert argument != null;
addUpdateSource(argument);
$arguments.add(argument);
// recalculate(); optimization
if ($effective) {
double oldValue = $value;
if (!argument.isEffective()) {
assignEffective(false);
} else {
assert argument.isEffective();
if (argument.getdouble() != initialValue()) {
$value = operation($value, argument.getdouble());
}
}
if ((!$effective) || !MathUtil.equalPrimitiveValue(oldValue, $value)) {
updateDependents(new ActualDoubleEvent(this, oldValue, $effective ? $value : null, null));
}
}
// otherwise, there is an existing null argument; the new argument cannot change null value
}