"from" followed by an expression means: Take the elements of the collection or array returned by the expression and evaluate the rule with each element.
Since a Fact() is not a Collection(), they are all filtered away: nothing remains, and so the query returns nothing. If you use $fact: Fact() from $tm.values() and iterate over the query rows and extract the object bound to "$fact" you'll get the Fact() things according to sort order. -W On 2 December 2011 10:42, Syargey <[email protected]> wrote: > I am still wondering why the following query doesn't work: > > query sortFactsQuery1 > $tm: TreeMap() > from accumulate( $f: Fact(), > init( TreeMap map = new TreeMap(); ), > action( map.put(factKey($f), $f); ), > reverse( map.remove(factKey($f)); ), > result( map ) ) > $sortedFacts: Collection() from $tm.values() > end > > -- > View this message in context: > http://drools.46999.n3.nabble.com/facts-custom-sort-tp3538410p3554200.html > Sent from the Drools: User forum mailing list archive at Nabble.com. > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-users
