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Back to the pricing issue! If you want to do this in a flexible OO way, 
you could use a Java based rules engine, such as DROOLs. Most of the 
business logic gets described as rules, which can even come from a DBMS. 
What ever class collaboration is responsible for setting the final price 
can then ensure that any "special pricing" events are fired before the 
final price is generated. The beauty of using Java here over RPG is that 
several groups have written rule engines that work with standard Java 
implementations. I don't think that you will find the same depth of 3rd 
party tools in the RPG space.

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