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<div><font size="2">This is in Drools 4.0.7</font></div>
<div><font size="2"> </font></div>
<div><font size="2">I have a class called SatManager with a field:</font></div>
<div><font size="2"> </font></div>
<div><font face="Courier New, monospace" size="2">ArrayList<Satellite> listOfOverheadSats </font></div>
<div><font face="Courier New, monospace" size="2"> </font></div>
<div><font size="2">That has an appropriate getter method.</font></div>
<div><font size="2"> </font></div>
<div><font size="2">I have a relatively simple rule that goes something like this:</font></div>
<div><font size="2"> </font></div>
<div><font face="Courier New, monospace" size="2">when</font></div>
<div><font face="Courier New, monospace" size="2"> $sat : Satellite(isOverhead == true)</font></div>
<div><font face="Courier New, monospace" size="2"> $sm : SatManager($ls : listOfOverheadSats not contains $sat)</font></div>
<div><font face="Courier New, monospace" size="2">then</font></div>
<div><font face="Courier New, monospace" size="2"> $ls.add($sat);</font></div>
<div><font face="Courier New, monospace" size="2"> </font></div>
<div><font size="2">My problem is that Drools doesn't understand that the ArrayList has been modified, therefore this rule always fires on the same satellite if the sat object changes in any other way.</font></div>
<div><font size="2"> </font></div>
<div><font size="2">I've tried adding:</font></div>
<div><font size="2"> </font></div>
<div><font face="Courier New, monospace" size="2">update($sm);</font></div>
<div><font face="Courier New, monospace" size="2"> </font></div>
<div><font size="2">To the consequence, but that only caused the rule to re-fire infinitely -- even with the no-loop keyword applied.</font></div>
<div><font size="2"> </font></div>
<div><font size="2">So my question is how does Drools manage its knowledge of changes to Collections embedded in fact objects? The documention for the 'contains/not contains' keyword did not explain this.</font></div>
<div><font size="2"> </font></div>
<div><font size="2">I'm really stumped here.</font></div>
<div><font size="2"> </font></div>
<div><font face="Tahoma, sans-serif" size="2" color="#008080">Allen F. Bagwell</font></div>
<div><font face="Tahoma, sans-serif" size="1" color="#008080">e-mail: afbagwe@sandia.gov</font></div>
<div><font face="Tahoma, sans-serif" size="1" color="#008080">phone: 505/284-4517</font></div>
<div><font face="Tahoma, sans-serif" size="1" color="#008080">fax: 505/ 844-7886</font></div>
<div><font face="Tahoma, sans-serif" size="1" color="#008080"> </font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt; "><font face="Tahoma, sans-serif" size="1" color="#008080">Ask your doctor if medical advice from a TV commercial is right for you.</font></div>
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