Inheritance from Java class with a public method accepting a protected class in Kotlin

Nikolay Romanov :

I have this situation: There are a Java class

public class A {

    public void overrideMe(B param){
        //TODO: override me in Kotlin!
    }

    protected static class B {

    }
}

and a Kotlin class, which inherits from it and has to override method "overrideMe"

class K: A() {
    override fun overrideMe(param: B) {
        println("Wow!")
    }
}

But Kotlin doesn't allow this behaviour.

'public' function exposes its 'protected (in A)' parameter type B

Is there any way how to resolve this one?

P.S. It's not just a synthetic case - I faced this problem when I tried to implement custom Spring AmqpAppender and to override it's postProcessMessageBeforeSend method.

Nikolay Romanov :

Well, after all, the conclusion is: there is no way to solve this situation in pure Kotlin.

I hope that AmqpAppender.Event will become public in the nearest future.

Even if Java allows that behaviour, having no-public arguments in public methods seems like a bad design for me (also for the developers of Kotlin).

Guess you like

Origin http://10.200.1.11:23101/article/api/json?id=457931&siteId=1

Inheritance from Java class with a public method accepting a protected class in Kotlin

Call Kotlin object with class delegation from Java as a static method

Using interface methods of enum in method accepting class

JAVA method, class and class inheritance, overloading, method rewriting, super keyword

js class static, public, private, protected

Kotlin call java method with Class<T> argument

Why do I get a BootstrapMethodError when trying to call a super class's protected method using method reference from an inner class?

Accessing Kotlin Sealed Class from Java

[Java] class inheritance

Inheritance and Polymorphism of JAVA Class

java inheritance, abstract class

Java class and inheritance

class inheritance in java

How to check if a class has overriden a default method from an interface using Reflection in Kotlin or Java?

Java synchronization method of handling security thread Thread class inheritance

Use a method from another JavaFX class Java

Java : call child class method from parent class using interface

php class drip --- access modifiers public protected private

Javadoc: error - can not find a documented public or protected class

c++ learning class and objects public, protected, private

Why is the need of Protected constructor in Abstract class in java

Public inheritance in C ++ private and protected inheritance of difference

JAVA inheritance (1) class inherits abstract class

How to access a public static final member in a Java class from Scala?

[Java] [Inheritance] Custom Shape Class

JAVA inheritance, super, this, abstract class

The eleventh JAVA homework "class inheritance"

Extending Kotlin class by Java requires me to reimplement already implemented method

Calling Kotlin function with parameter as sealed class from java

Converting private class from Kotlin to Java via bytecode