I'm working on a small financial site that uses a lot of financial formulae
(duh).  I'm also an OO newbie and trying to get up to speed on the
methodology with this project (using machii).
 
Since a lot of the financial formulae are dependent upon each other, one of
the troubles I'm having is with the separation of the business logic into
small, 'do one thing well' type pieces.
 
For example, if there are 5 calculations that need to be made: A, B, C, D
and E:
 
A is a simple calculation on values stored in the db
B uses A values to make its calculation
C uses A and B values, and the previous date's value of C for its
calculation
Etc.
 
With this set up I'm having difficulty creating cohesive objects.  There
seems too much dependency between each calculation to really separate them.
Separating them into individual components just seems to create a string of
dependent objects.

Perhaps I should be creating "parent" objects that tie these smaller
calculation objects together?
 
Any advice appreciated.
 
Cheers,

Sam
 
________________________________

Sam Clement
ABOVE Studios
Boutique Design Solutions
<http://www.abovestudios.com/>          
32 Clifford St - Belmont
Trinidad + Tobago - West Indies
T: (868) 621 5159 
W: abovestudios.com <http://www.abovestudios.com/> 

        
 

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