The fails() method used to compile properly, but it doesn't anymore. The now() method seems to lose track of its return type and now forces me to cast (which I didn't have to do in java 7). The problem seems to arise only if I use the new SelfLink(); using similarly typed interfaces works fine.
I may be doing something wrong, but for the life of me, I can't figure it out.
Here is the code.
public class Main {
// The command
public interface ToMessageOperation<MODEL, MESSAGE> {
void run(MODEL object, MESSAGE message) throws Exception;
}
// A command
public class SelfLink<MODEL> implements ToMessageOperation<MODEL, LinkedMessage> {
@Override
public void run(MODEL object, LinkedMessage linkedMessage) throws Exception {
}
}
// A message type
public interface LinkedMessage {
void linkme();
}
// A message
public interface BootInfo extends LinkedMessage {
}
//The Executor
public interface GetRequest<MODEL, MESSAGE> {
GetRequest<MODEL, MESSAGE> runAll(ToMessageOperation<? super MODEL, ? super MESSAGE>... operations);
GetRequest<MODEL, MESSAGE> cleanUp();
MESSAGE now();
}
// The command factory
public SelfLink selfLink() {
return null;
}
public <MODEL, MESSAGE> GetRequest<MODEL,MESSAGE> get(Class<MESSAGE> message) {
return null;
}
public BootInfo works() {
return get(BootInfo.class).cleanUp().now();
}
public BootInfo alsoWorks() {
return get(BootInfo.class).runAll(new ToMessageOperation<Object, BootInfo>() {
@Override
public void run(Object object, BootInfo bootInfo) throws Exception {
}
}).now();
}
public BootInfo surprisedItWorks() {
return get(BootInfo.class).runAll(new ToMessageOperation<Object, LinkedMessage>() {
@Override
public void run(Object object, LinkedMessage message) throws Exception {
}
}).now();
}
public BootInfo fails() {
return get(BootInfo.class).runAll(new SelfLink()).now();
}
}