JESS: To give arguments from Java to Jess

Mon, 20 Mar 2000 20:56:59 -0800

I'm new mexican Jess's user, I don't speak english very well, sorry.
I'm use Jess for to develop a Expert System, my idea is use Java for the interfaz and Jess for KB. Now I'm make small examples, but I've the problem that I'm trying to build rules that receive arguments of a bean in Java. For
instance, if I (assume properly) define a bean in java like this:
public class Datos
{
 When I give value here, I've not problem. But I need obtain with methods (In the future I'll make applets). My idea is obtain the value of variables from a applet, and send this to the KB.
 
  private String m_temp;//= "anual";  (1)
  private int m_pluvial;//= 1500;
 
  public void setTemp(String temp)
  {
    String tmp = m_temp;
    m_temp = temp;
    pcs.firePropertyChange("temp", tmp,
                           m_temp);
  }
 public void setPluvial(int pluvial)
  {
    int tmp = m_pluvial;
    m_pluvial = pluvial;
    pcs.firePropertyChange("pluvial", new Integer(tmp),
                           new Integer(m_pluvial));
  }

 public String getTemp()
  {
     return m_temp;
  }
  public int getPluvial()
  {
    return m_pluvial;
  }
 
  private PropertyChangeSupport pcs = new PropertyChangeSupport(this);
  public void addPropertyChangeListener(PropertyChangeListener pcl)
  {
    pcs.addPropertyChangeListener(pcl);
  }
  public void removePropertyChangeListener(PropertyChangeListener pcl)
  {
    pcs.removePropertyChangeListener(pcl);
  }
}
And my KB in Jess is:

(defclass evapo Datos)
(bind ?sb (new Datos))
(definstance evapo ?sb dynamic)
...
 
(defrule alfalfa
    (evapo (temp "anual")(pluvial ?x&:(> ?x 600)&:(< ?x 1500)))
      =>
  (assert (producto (name alfalfa)(min 600) (max 1500)))
  (printout t "* Alfalfa" crlf)
  )
... 
 
The problem now is that the KB isn't receive nothing, but if I gived static values of the variables in my class Datos, the rules are fired (1). But I need that the value are dynamics.
 
I don�t if somebody understand me, but if you can help me, I would be eternally grateful.

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