yinonavraham

public interface AB extends A {
    String bar();
}

yinonavraham

public interface A {
    String foo();
}

yinonavraham

public abstract class ABFactory {
    private ABFactory() { /* prevent instantiation */ }

    public static AB createAB(A a) {
        B b = new BImpl(a);
        return (AB) Proxy.newProxyInstance(a.getClass().getClassLoader(),
                new Class[]{AB.class}, (proxy, method, args) -> {
            Class<?>[] declaringClassInterfaces = method.getDeclaringClass().getInterfaces();
            List<Class<?>> interfaces = new ArrayList<>(Arrays.asList(declaringClassInterfaces));
            interfaces.add(method.getDeclaringClass());

yinonavraham

GET /trust/official.json HTTP/1.1
Host: dvjy3tqbc323p.cloudfront.net
User-Agent: Go 1.1 package http
Accept-Encoding: gzip