Re: SWI-Prolog Query

As far as i understand you are running Prolog interpreter as OS command,
eg. "Runtime.getRuntime().exec("swipl");"
Am i right?

if so, you could use -s flag in the call to specify the source file to be
loaded by interpreter and -t for toplevel goal, eg.
Runtime.getRuntime().exec("swipl -s blah.pl -t somegoal");

to output to file use "tell" predicate in goal specified by -t
eg. -t "tell('out.txt'), my_predicate(X), write(X), told"

"my_predicate" is a predicate you want to call.

HTH





2014-04-15 16:49 GMT+02:00 Pavan Kumar <[email protected]>:

> I have a Java Program that generates a SWI-Prolog Query and writes to a
> file, I need to Invoke SWI-Prolog from my Java Program and SWI-Prolog
> should take the file having the Query as Input and write the Output to
> another file.
> So, I found Open(/4) in SWI-Prolog but didn't understand it, its usage and
> how to make SWI-Prolog execute the Command in that file and also specify
> the Target Output file that SWI-Prolog should write to.
>
> Also Is it possible to call SWI-Prolog from my Java Program and make it
> execute the Query in file? if yes, can anyone let me know how to do it?
> Also, There can be one or more commands in the Input file for SWI-Prolog It
> should execute the commands in that file and write output to a Target file
> mentioned.
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