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26 package io.github.prolobjectlink.prolog;
27
28 import java.util.ArrayList;
29 import java.util.List;
30 import java.util.concurrent.ExecutionException;
31 import java.util.concurrent.FutureTask;
32 import java.util.concurrent.RunnableFuture;
33 import java.util.logging.Level;
34 import java.util.logging.Logger;
35
36 class PrologRunnable extends FutureTask<List<List<Object>>> implements RunnableFuture<List<List<Object>>> {
37
38 private final PrologCallable callable;
39
40 PrologRunnable(PrologCallable callable) {
41 super(callable);
42 this.callable = callable;
43 }
44
45 PrologRunnable(PrologProvider provider, PrologTerm... goals) {
46 this(new PrologCallable(provider, goals));
47 }
48
49 public PrologProvider getProvider() {
50 return callable.getProvider();
51 }
52
53 public List<List<Object>> get() throws InterruptedException, ExecutionException {
54 List<List<Object>> list = new ArrayList<List<Object>>();
55 try {
56 list = callable.call();
57 } catch (Exception e) {
58 Logger.getLogger(Prolog.class.getName()).log(Level.FINEST, null, e);
59 }
60 return list;
61 }
62
63 }