Is there a way to obtain the generic type of a field in Java?
I have following object variables:
protected ScheduleView<WantedClass> scheduleLine1;
protected ScheduleView<SomeOtherClass> scheduleLine2;
Now I try using reflection to obtain all the object variables who have ScheduleView
as type with WantedClass
as generic type:
Arrays.asList(this.getClass().getDeclaredFields()).stream().map(field -> {
ScheduleView<WantedClass> retValue = null;
System.out.println(field.getGenericType()); // prints control.ScheduleView<dto.WantedClass>
try {
if (field.getType() == ScheduleView.class) { // here I also want to check if the generic type is WantedClass
retValue = (ScheduleView<WantedClass>) field.get(this);
} else {
retValue = null;
}
} catch (IllegalAccessException e) {
retValue = null;
} finally {
return retValue;
}
}).filter(scheduleView -> scheduleView != null).forEach(scheduleView -> {
/* some more code */
});
The thing is I also want to check in the if-Statement if the generic type is WantedClass
. I also tried using the method getGenericType()
but it seems something like this is not possible:
field.getGenericType() == ScheduleView<WantedClass>.class
So is there a way to get the generic type of a field?
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