That "create$" call is creating a list with one element, the ArrayList. Iterating over the Jess list returns just the ArrayList - not what you want.
In recent versions of Jess, the "foreach" function actually knows about Iterators and the like, so you can iterate over the ArrayList directly: (foreach ?u (?bwapi getMyUnits) (printout t (?u toString) crlf)) From: owner-jess-us...@sandia.gov [mailto:owner-jess-us...@sandia.gov] On Behalf Of Hunter McMillen Sent: Tuesday, December 13, 2011 8:56 PM To: jess-users Subject: JESS: [EXTERNAL] Iterate over a Java List in Jess Is there anyway to iterate over a Java List object from Jess? I have a Java object that I store in a Jess variable: engine.getGlobalContext().setVariable("bwapi", new Value(bwapi)); one of the methods that can be called on bwapi returns a Java ArrayList, and I would like to be able to iterate over this list to check certain properties of its elements. Right now I am doing this: engine.executeCommand("(bind ?units (create$ =(?bwapi getMyUnits)))"); engine.executeCommand("foreach ?u ?units (printout t ?u crlf))"); but when the units are supposed to be printed all I get is: = <Java-Object:java.util.ArrayList> Any ideas? Thanks, Hunter M
