OOPS, Question Q3 below, I meant the LHS of the rule instead of RHS. _________ Vicken Kasparian Cheetah Technologies 941-739-3904 ext. 3550 http://www.cheetahtech.com > -----Original Message----- > From: Vicken Kasparian > Sent: Tuesday, November 30, 1999 4:30 PM > To: [EMAIL PROTECTED] > Subject: Working with Java objects > > Hi: > > In my application, I have Java class objects being created and deleted > dynamically. At a given time, I could have thousands of objects that I > want to write rules against. > I was trying to follow the example of the "pumps-fromjava". In that > example, only two objects are created, a pump and a tank. Those objects > are made accessible to the rule engine through the following statements: > // Tell Jess about them > Funcall f = new Funcall("definstance", rete); > f.add(new Value("pump", RU.ATOM)); > f.add(new Value(p)); > f.execute(rete.getGlobalContext()); > > f = new Funcall("definstance", rete); > f.add(new Value("tank", RU.ATOM)); > f.add(new Value(t)); > f.execute(rete.getGlobalContext()); > Then the rule engine is run by : > rete.executeCommand("(run)"); > > In my application, have thousands of objects that I am working with and > they are being created and deleted dynamically. > > Q1. Do I need to tell Jess about each instance of an object for which I > have rules for, or can the rules be defined to work for a class of > objects? > If yes then do I need to call f = new Funcall("definstance", rete) for > each instance of an object that I create? (Any limitations or performance > issues if that is the case?) > > Q2. Is there an explanation somewhere about how the LHS of rules match > patterns for objects defined in a Java code. For example, > (defrule warn-if-low > (tank (name ?name) (low TRUE) (intact TRUE)) > "low" and "intact" are not attributes (properties) of tank. How are > the being used in this rule? > > Q3. Can you have a function call that returns a Boolean on the RHS of a > rule? For example, I would like to check in a rule the existence of an > object in the Java app's working memory that matches a certain pattern. > This can be used to do correlation of patterns across multiple instances > of objects. (If not, any ideas for a workaround??) > > Thank you in advance for any feedback. > > Regards, > _________ > Vicken Kasparian > Cheetah Technologies > 941-739-3904 ext. 3550 > http://www.cheetahtech.com > > --------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] ---------------------------------------------------------------------
