incremental indexation

[ZYWALEWSKI, DANIEL (DANIEL)]

Hello,
 I'm just stuck with one problem and don't know how to figure it out. I'm 
working on the indexation of the objects that are in computer memory (they 
exist only in my java code). Don't have any problems with indexing it, however 
I have no idea how to re-index it if they change during the execution of this 
code; one of my ideas is adding some events to this objects (if you change any 
parameters -> reindex it ). However I'm not sure about its efficiency?
 Thank you in advance
   Daniel