if a java class implements this interface:

interface Foo {
    val bar : FooBar
}

the autogenerator generates a getter for that value:

class MyClass implements Foo {
    @Override public FooBar getBar() {
        return null; // TODO implement
    }
}

Nevertheless I can still call the property from my java code:

this.bar.doSomething()

. What does this do internally? Will the getter be only called once when the class gets created or will getBar() be called everytime I access the property?