EOF Design Questions

Howdy All,

The standard use of EOF is something like this:

Fetch a number of EOs into an EC (as needed).
Make changes to some or all of the EOs, i.e. EOi(StateAi) ---> 
EOi(StateBi)
Add some new EOs or delete some of the fetched EOs

I am wondering how to the following efficiently, after the above:

Clone all the EOs in the EC that have been change, i.e. EOi(StateBi) 
---> EOj(StateBi)
Revert only the original EOs to their fetched state, i.e. EOi(StateBi) 
---> EOi(StateAi)
Note: Any deleted EOs would not be cloned but still reverted, i.e. 
no-longer deleted
Make some more changes to the original fetched EOs, i.e. EOi(StateAi) 
---> EOi(StateCi)
Save all the originally fetched EOs and new EOs i.e. ec.saveChanges()
Note: The new EOs include (really) new EOs and cloned EOs.

I've looked at the APIs for EC and EOGenericRecord and nothing pops 
out, specifically with respect to:

1.  How best to clone an EO in an EC?
Create and insert a new EO, transfer state, ...

2.  How best to revert some EOs (but not all) in the EC?
Using the original snapshot ... but could that change (is that a 
problem)?

Any suggestions, important API calls, pseudocode, would be most 
appreciate.

Thanks in advance,
Ashley Aitken.


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Ashley Aitken
Perth, Western Australia
mrhatken at mac dot com