Ernest,
I've got some questions about defclass and array's based on an email you
responded to several weeks ago.
> Now if you defclass a Bean with a method like getN123, the
> correseponding deftemplate will look like
>
> (deftemplate my-object (multislot n123) ...)
>
Does this mean I have to create a deftemplate to support the defclass?
> Now, for any of these three methods, if you want to set the
> property/the variable/call a setter method, you have to assemble a
> multifield with all the values, and set the whole thing at once.
>
Can you give me an example?
> Jess does not currently handle what the Beans spec calls 'indexed
> properties', which are methods like int getn123(int idx), in the
> defclass statement.
Is this something your looking at in the future?
Thanks.
glenn
>> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
> Behalf Of Ernest Friedman-Hill
> Sent: Friday, September 25, 1998 4:24 PM
> To: [EMAIL PROTECTED]
> Subject: Re: JESS: Jess defclass/array question
>
>
> I'm a little bit confused by your mentioning 'defclass' and 'instance
> variables' in the same sentence, as defclass deals with Bean
> properties, which are not variables but methods. But, in any case,
> when you fetch an array from Java into Jess, you get it as a
> multifield. If Jess calls a Java method
>
> int[] getN123() { return new int[] { 1, 2, 3 }; }
>
> using 'call', as in
>
> (call ?anObject getN123)
>
> the return value is the multifield (1 2 3). You can then access
> individual elements using the multifield functions like nth$.
>
> Similarly, if you call get-member to retrieve a Java instance variable
> which is an array.
>
> Now if you defclass a Bean with a method like getN123, the
> correseponding deftemplate will look like
>
> (deftemplate my-object (multislot n123) ...)
>
> Now, for any of these three methods, if you want to set the
> property/the variable/call a setter method, you have to assemble a
> multifield with all the values, and set the whole thing at once.
>
> Jess does not currently handle what the Beans spec calls 'indexed
> properties', which are methods like int getn123(int idx), in the
> defclass statement.
>
>
>
>
>
> I think [EMAIL PROTECTED] wrote:
> >
> > [I'm using Jess4.1 Final]
> >
> > I've been using defclass to communicate between Jess and Java,
> as described
> > in Section 7.7 of the Jess manual.
> >
> > So far, I've used simple data types for instance variables, and this has
> > worked fine.
> >
> > Now I'm trying to get access to an array that is an instance variable.
> >
> > According to the documentation in 7.7.1, "Array properties give rise to
> > multislots in Jess."
> >
> > I take this to mean that I can have arrays as instance
> variables in the Java
> > class, and that these arrays become multislots in the Jess class.
> >
> > Am I interpreting this right? If so, does anyone have an
> example that shows
> > how to get access to the array, and the individual array elements?
> >
> > Thanks in advance.
> >
> > Tom Hamilton
> > United Technologies Research Center
> > ---------------------------------------------------------------------
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> >
> >
>
>
> ---------------------------------------------------------
> Ernest Friedman-Hill
> Distributed Systems Research Phone: (510) 294-2154
> Sandia National Labs FAX: (510) 294-2234
> Org. 8920, MS 9214 [EMAIL PROTECTED]
> PO Box 969 http://herzberg.ca.sandia.gov
> Livermore, CA 94550
>
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