static Func <object, bool> BuildFilter(string filter, ActorType type)
{
if (filter == null)
{
var prototype = ActorPrototype.Of(type);
return(item => prototype.DeclaresHandlerFor(item.GetType()));
}
if (filter == "*")
{
return(item => true);
}
if (!filter.EndsWith("()"))
{
throw new InvalidOperationException("Filter string value is missing '()' function designator");
}
var method = GetStaticMethod(filter, type.Implementation);
if (method == null)
{
throw new InvalidOperationException("Filter function should be a static method");
}
return((Func <object, bool>)method.CreateDelegate(typeof(Func <object, bool>)));
}
internal static StreamSubscriptionSpecification From(ActorType actor, StreamSubscriptionAttribute attribute)
{
return(From(actor, ActorPrototype.Of(actor), attribute));
}
internal static IEnumerable <StreamSubscriptionSpecification> From(ActorType actor)
{
return(From(actor, ActorPrototype.Of(actor)));
}