[rules-users] Strategy for initializing objects

Hello I want to achieve this: box1.setX(0) box2.setX(box1.size()); box2.setX(box1.size + box2.size) ... I want to do it with rules, and would like to know what's the best method of initializing (or any other operation with varying data) a group of objects rule "init box" when b : Box( x == -1) then b.setX(Box.getX()); Box.setX( Box.getX() + b.size); end This does not work. A single box object is matched several times instead of different box objects. What is happening? how come a single box object is matched several times? Why doesnt drools choose other instances of box? What do I need to do to initialize all boxes, once for every box? Thank you. -- robosonia