Question

Can’t find the reason why a method does not see inheritance. What am I missing here?

public class Rate extends BaseResource
public class GenericQuote extends BaseResource
public class Payment extends GenericQuote

public void handleMediationErrors(BaseResource response)

handleMediationErrors(myRate) <– works
handleMediationErrors(myPayment) <– fails at compile time tells me that it expects BaseResource not Payment

Answer 1

There’s nothing wrong with the example you’ve given – perhaps you’re using a different BaseResource in one of the classes (importing a different one or declaring it separately elsewhere – this can cause confusion!)

To prove it, this example compiles perfectly:

class BaseResource {}
class Rate extends BaseResource {}
class GenericQuote extends BaseResource {}
class Payment extends GenericQuote {}

public class Test {

    public void handleMediationErrors(BaseResource response) {}

    public static void main(String[] args) {
        new Test().handleMediationErrors(new Payment());
        new Test().handleMediationErrors(new Rate());
        new Test().handleMediationErrors(new GenericQuote());
        new Test().handleMediationErrors(new Payment());
    }
}