How to communicate between java in Prolog?

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Good morning!

I need to develop an expert system as a college job. I thought of doing it using java to create the interface and Prolog as the engine of inference and basis of facts. But the links I found about a JPL library are broken and I don’t know how to communicate between these two technologies. Someone can give a light?

ps: Use Ubuntu 14.04

java linux ubuntu prolog

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An alternative is the library tuProlog I used to make a chess game using java for the interface and Prolog as inference engine

In the Java file would have something like:

static Prolog engine = new Prolog();
engine.setTheory(new Theory(new FileInputStream("prolog/xadrez.pl")));
engine.solve("iniciarJava.");
info = engine.solve("mostrartab(T).");

In the file Prolog the rules and logic:

mostrartab(T):-
  findall((P,Cl,(L,C)),p_atual(P,Cl,(L,C)),T).

/*carrega a base de fatos que será o tabuleiro durante a partida*/
iniciarJava:- retractall(p_atual(_,_,(_,_))),retractall(cemiterio(_,_)),
assert(p_atual('T','B',(1,1))),assert(p_atual('H','B',(1,2))),
assert(p_atual('B','B',(1,3))),assert(p_atual('Q','B',(1,4))),
assert(p_atual('K','B',(1,5))),assert(p_atual('B','B',(1,6))),
assert(p_atual('H','B',(1,7))),assert(p_atual('T','B',(1,8))),
assert(p_atual('T','W',(8,1))),assert(p_atual('H','W',(8,2))),
assert(p_atual('B','W',(8,3))),assert(p_atual('Q','W',(8,4))),
assert(p_atual('K','W',(8,5))),assert(p_atual('B','W',(8,6))),
assert(p_atual('H','W',(8,7))),assert(p_atual('T','W',(8,8))),
assert(p_atual('P','B',(2,1))),assert(p_atual('P','B',(2,2))),
assert(p_atual('P','B',(2,3))),assert(p_atual('P','B',(2,4))),
assert(p_atual('P','B',(2,5))),assert(p_atual('P','B',(2,6))),
assert(p_atual('P','B',(2,7))),assert(p_atual('P','B',(2,7))),
assert(p_atual('P','W',(7,1))),assert(p_atual('P','W',(7,2))),
assert(p_atual('P','W',(7,3))),assert(p_atual('P','W',(7,4))),
assert(p_atual('P','W',(7,5))),assert(p_atual('P','W',(7,6))),
assert(p_atual('P','W',(7,7))),assert(p_atual('P','W',(7,8))),
assert(p_atual(' ',' ',(_,_))).

To catch the return of the Prolog:

info.getVarValue("T")

  • to work just put the . jar as library of the project?

  • this, then you import in the classes of tuProlog

  • in this case, it has 2p.jar and tuprolog.jar. 2p.jar contains some packages of tuprolog.jar, I think it would be more recommended to add only 2p.jar so ne?

  • It will depend on which packages you will use, if 2p.jar has what you need just use it.

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