Is there a, kind of, 'Crystal Ball' OOP Design Pattern?

Question

With regards to design patterns such as GoF, is there a pattern to decribe when one object needs to observe another object that is not even in existance yet?

i.e.

$crystalBall = new crystalBall();
$futureDependent = new FutureDependent();
$futureDependent->attach($crystalBall);

...

then much later
....

$importantObject = new ImportantObject()
$crystalBall->sendToFutureDependent($importantObject);

......
then later again


$strawberriesAndCreamMmmmmLovely = $futureDependent->doStuffWithImportantObject();

Its kind of like an observer in reverse. But different in the sense that on observer gets notified of events.

were as this one just wants a reference to it when its created.

Any ideas?

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Update - after commenting on Chacha102's answer i realise....Crystal Ball is a Registry...it helped by having to say the words... "difficult to get hold of"

Answer 1

I don't get why you wouldn't just have the importantObject attach directly to the futureDependant.