Just for the heck of it, here's two more ways for "comibining" those two rules. (Gee, what a vague specification!)

# straightforwardly doing both in one
rule comb1
when
   $cm: ConditionMatrix()
   $docs1: ArrayList() from collect( Document( ... ) )
   $docs2: ArrayList() from collect( Document( ... ) )
then ... end

# abstraction
rule comb2
when
   $cm: ConditionMatrix()
   $filter: Filter()
   $docs: ArrayList() from collect( $d: Document() eval( $filter.pass( $cm, $d ) ) )
then ... end

-W



2011/5/25 Vincent Legendre <vincent.legendre@eurodecision.com>
Not sure of what you exactly ...

If you want to combine tests, you can write this :
Rule “test filter”
When
      $cm:  ConditionMatrix()
      $document:   ArrayList() from collect ( Document (user.isPrivateName  == $cm.isPrivateName, Payment.isLegal == $cm.isLegal) )                                                             
Then
                //do something
End

If you want to make the filter more dynamic and write only one "collect" rule, I don't see any out-of-the-box method.
You can add a method in ConditionMatrix that accepts a Document and write this rule :

Rule “test filter”
When
      $cm:  ConditionMatrix()
      $document:   ArrayList() from collect ( Document (eval($cm.accept(this)) ) )                                                             
Then
                //do something
End

Of course you have to implement the "accept" method in Java (and you can then do several sub-classes for you filters)


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