Can I use Java code inside the @Calculation annotation in OpenXava?

Question

Does the @Calculation annotation support Java code? For example, does the next code work?

LocalDate startDate;

@Calculation("startDate.plusDays(400)")
LocalDate endDate;

Otherwise, how can I implement the above case?

Answer 1

In @Calculation you can only use basic arithmetic expressions. If you want to use Java, create a calculated property, that is, just define a getter without field and setter, like this:

@Depends("startDate")
public LocalDate getEndDate() {
    return startDate.plusDay(400);
}

Note the @Depends("startDate") in order endDate would be recalculated in UI when startDate changes.