Re: JESS: Java reflection - the store () command

Mon, 15 Jan 2001 12:24:17 -0800 

When your command

> (defclass dates RelevantDate)

yields a deftemplate definition

>(deftemplate dates extends __fact "$JAVA-OBJECT$ RelevantDate" 
> (slot class ...)
> (slot OBJECT (type 2048)))

then the RelevantDate class does most likely not conform to the JavaBean
standard of naming getter/setter methods for the Bean's attributes.

Thomas

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Hello all,
 
I'm having trouble using the Jess command store() from Java to insert Java objects as facts into a Rete engine. The example in the user manual works, when calling Java's core packages i.e..
 
app.rete.store("BUTTON", new java.awt.Button("Press Me!"));
app.rete.executeCommand("(defclass button java.awt.Button)");
app.rete.executeCommand("(definstance button (fetch BUTTON) static)");
 
 
As expected, these commands create a deftemplate with the requisite slots for an instance of Button, and creats a fact with the slots filled. However, when storing a class defined in my program (here RelevantDate), only one slot seems to be created (
 
app.rete.store("DATE1", app.date1);
app.rete.executeCommand("(defclass dates RelevantDate)");
app.rete.executeCommand("(definstance dates (fetch DATE1) static)");
 
The resulting deftemplate:
 
(deftemplate dates extends __fact "$JAVA-OBJECT$ RelevantDate"
 (slot class (default <External-Address:jess.SerializablePropertyDescriptor>))
 (slot OBJECT (type 2048)))
 
I have no trouble retrieving this object direct from the Java code, but I need a way to create individual slots for the variables in a RelevantDate object in Jess. Can anyone help?
 
Thanks in advance, Scott Duguid

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