private MethodHandle addReturnConversion(MethodHandle finisher, Class<?> type) {
// FIXME: This is slow because it creates a closure node on every call that requires a return
// cast.
MethodType finisherType = finisher.type();
MethodHandle caster = ValueConversions.identity(type);
caster = caster.asType(caster.type().changeParameterType(0, finisherType.returnType()));
finisher = MethodHandles.filterReturnValue(finisher, caster);
return finisher.asType(finisherType);
}
/**
* Return a method handle to invoke on the callerType, target, and remaining arguments. The method
* handle must finish the call. This is the first look at the caller type and target.
*/
private MethodHandle dispatch(MethodType callerType, MethodHandle target) {
MethodType targetType = target.type();
if (USE_AS_TYPE_PATH || target.isVarargsCollector()) {
MethodHandle newTarget = target.asType(callerType);
targetType = callerType;
Invokers invokers = targetType.invokers();
MethodHandle invoker = invokers.erasedInvokerWithDrops;
if (invoker == null) {
invokers.erasedInvokerWithDrops = invoker = dropDispatchArguments(invokers.erasedInvoker());
}
return invoker.bindTo(newTarget);
}
throw new RuntimeException("NYI");
}