[pigeon] let Java FlutterApis be invoked with null callbacks #58913
Description
I had IDL with
@FlutterApi()
abstract class FlutterBookApi {
void displayBookDetails(Book book);
}it created Java code
public interface Reply<T> {
void reply(T reply);
}
public void displayBookDetails(Book argInput, Reply<Void> callback) {
BasicMessageChannel<Object> channel =
new BasicMessageChannel<Object>(binaryMessenger, "dev.flutter.pigeon.FlutterBookApi.displayBookDetails", new StandardMessageCodec());
HashMap inputMap = argInput.toMap();
channel.send(inputMap, new BasicMessageChannel.Reply<Object>() {
public void reply(Object channelReply) {
callback.reply(null);
}
});
}but if I don't care about the result, I can't pass null to callback since it doesn't null check and can crash.
cc @gaaclarke