Re: [Info-gnuprologjava] few questions about your package

[Noor Ahmed]

Hello again,

I used the tips you gave me, but it's still not working. I am using WIN-Prolog, and in order to run the .pl code I have to write:

              ?- read_words(A).
              :- "line of text for processing".

In the Java code, all I did was invoke the "read_words" method. And then, how can I send a line of text to the prolog code from Java? I can't use the line of text as an argument, I tried it and it won't work.

Here's where I'm stuck at:

    Environment en = new Environment();
    en.ensureLoaded(AtomTerm.get("this://e-Q/src/pkginterface/code.pl"));
   
    Interpreter intr;
    Term ans = null;
   
    intr = en.createInterpreter();
   
       
    VariableTerm str = new VariableTerm(label.getText());
    VariableTerm arg1 = new VariableTerm("A");
   
      Term[] args = {arg1};
    
     CompoundTerm goalTerm = new CompoundTerm(AtomTerm.get("read_words"), args);
   
     en.runInitialization(intr);
    
     Goal goal =intr.prepareGoal(goalTerm); 
        try {
            int rc = intr.execute(goal);
        } catch (PrologException ex) {
            Logger.getLogger(checkBalance.class.getName()).log(Level.SEVERE, null, ex);
        } //I need to send the line of text after invoking the read_words method
       
       
       ans = (AtomTerm) goalTerm.dereference();
      
       String check = ans.toString();

Thank you in advance.

Regards.

On Wed, Dec 21, 2011 at 4:44 PM, Daniel Thomas <address@hidden> wrote:

How exactly is it not working properly?

I won't compile as 'label.getText()"."' is invalid and you don't need to
add in "." like that which might be the problem you are getting when you
create the goalTerm as you put a . in when you don't need to. The the
CompoundTerm is not being correctly constructed as the first argument is
the functor and so should just be "read_words" without any brackets or
arguments - that is what args is for.

I hope that helps,

Daniel

On Tue, 2011-12-20 at 21:35 +0300, Noor Ahmed wrote:
>
> Hello,
>
> I have a few questions about your package. The setup instructions are
> not clear. I am using WIN-Prolog, and want to connect it to an
> interface created in Java.
> In WIN-Prolog I have to write "read_words" to run the program, which
> takes a line of string -that comes from the interface- for processing.
>
> So this is the code I wrote, I'm very sure it's wrong because it's not
> working properly:
> "
>
>     Environment en = new Environment();
>
> en.ensureLoaded(AtomTerm.get("/Users/NetBeansProjects/e-Q/src/pkginterface/code.pl"));
>
>     Interpreter intr;
>     AtomTerm ans = null;
>
>     intr = en.createInterpreter();
>
>
>         VariableTerm str = new VariableTerm(label.getText()".");
>
>       Term[] args = {str};
>
>      CompoundTerm goalTerm = new CompoundTerm("read_words(A).", args);
>
>      en.runInitialization(intr);
>         try {
>             intr.runOnce(goalTerm);
>         } catch (PrologException ex) {
>
> Logger.getLogger(checkBalance.class.getName()).log(Level.SEVERE, null,
> ex);
>         }
>
>        ans = (AtomTerm) goalTerm.dereference();
>
>         String check = ans.toString();
> "
>
> Please can you reply soon. Thank you.
>
>
> Regards.
>