Please implement "collect( ... ) from" functionality ---------------------------------------------------- Key: JBRULES-546 URL: http://jira.jboss.com/jira/browse/JBRULES-546 Project: JBoss Rules Issue Type: Feature Request Security Level: Public (Everyone can see) Reporter: Dirk Bergstrom Assigned To: Mark Proctor I need to count the number of sub-objects that meet various criteria. As an example, suppose I have several hundred Town objects, each of which has a list of perhaps a few hundred Person objects. I need to write rules like: "Find all the towns that have more than three disabled people with incomes over $100K." "For each town with more than 1000 residents that has more than 50 poor children under the age of 8, add a teacher for every 25 children." I'm shaky on JBR syntax, but I think those would translate to something like: rule "disabled" when ArrayList(size > 50) from collect( Person( disabled == "yes", income > 100000 ) from town.getPersons() ) then //do stuff end rule "teachers" when town : Town( population > 1000 ) count : Arraylist from collect( Person( disabled == "yes", income > 100000 ) from town.getPersons() ) count( size > 50 ) then town.addTeachers(count.size() / 25) end (I'm not really working with towns and people, but it makes for easily understood examples) -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira