[Erp5-dev] collectMovement

[Yoshinori Okuji]

I've commited a generic implementation of collectMovement in 
SimulationTool. It should be compatible with the old version, but has 
many options and the underlying implementation is a bit different.

collectMovement can make a tree of movements by classifying them based 
on resources, variants, base categories, and so on. One tricky part in 
collectMovement is CriterionGroup. This class is used to classify 
movements based on class-specific (or object-specific) information.

For example, InvoiceLine and InvoiceCell define the method 
"getGroupCriterion" which return the result of "self.getPrice()":

  def getGroupCriterion(self):
    return self.getPrice()

Then, collectMovement can classify movements based on the price. This 
method can return anything as far as it is a pickable object. This 
means that it is necessary to use a tuple instead of a list, if you 
want to return a set of values, because lists are not pickable in 
Python. Also, you cannot use acquired wrappers, because these are not 
pickable.

The code is tested with a part of my testFusion.py test suite.

YO
-- 
Yoshinori Okuji, Nexedi Research Director
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