[Pharo-project] Issue 3322 in pharo: [Kernel Dependencies] ClassDescription>>#updateInstanceFrom:

pharo at googlecode.com pharo at googlecode.com
Fri Nov 26 12:25:47 CET 2010


Comment #1 on issue 3322 by jannik.laval: [Kernel Dependencies]  
ClassDescription>>#updateInstanceFrom:
http://code.google.com/p/pharo/issues/detail?id=3322

mail from Mariano:


The problem is the class changes. If there are objects that or disk with an  
image semgment, you want to load back the segment, update their instances  
(of the class that changed), and then put them again on disk. To do this,  
ImageSegment puts its code in updateInstancesFrom: oldClass

I don't know about announcements or SystemNotifier. If someone is already  
notifying a class change, then ImageSegment could be just registered there,  
be notified and wala, no dependency. But I am not sure if someone is  
notifying or how to do it (to add it).







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