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package uk.ac.ox.cs.pagoda.reasoner.light;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;
import org.semanticweb.karma2.*;
import org.semanticweb.karma2.clausifier.OntologyProcesser;
import org.semanticweb.karma2.exception.IllegalInputOntologyException;
import org.semanticweb.karma2.model.ConjunctiveQuery;
import org.semanticweb.owlapi.model.OWLOntology;
import uk.ac.ox.cs.pagoda.query.*;
import uk.ac.ox.cs.pagoda.util.ConjunctiveQueryHelper;
import uk.ac.ox.cs.pagoda.util.Utility;
import uk.ac.ox.cs.JRDFox.JRDFStoreException;
import uk.ac.ox.cs.JRDFox.store.DataStore;
public class KarmaQueryEngine extends RDFoxQueryEngine {
private MyKarma reasoner = null;
String karmaDataFile = null, karmaRuleFile = null;
public KarmaQueryEngine(String name) {
super(name);
// int Base = 1 << 6;
// int index = (new Random().nextInt() % Base + Base) % Base;
// karmaDataFile = "karma_data" + index + ".ttl";
// karmaRuleFile = "karma_rule" + index + ".dlog";
karmaDataFile = Utility.TempDirectory + "karma_data.ttl";
karmaRuleFile = Utility.TempDirectory + "karma_rule.dlog";
reasoner = new MyKarma();
}
public MyKarma getReasoner() {
return reasoner;
}
public void processOntology(OWLOntology elhoOntology) {
try {
OntologyProcesser.transformOntology(elhoOntology, new File(karmaDataFile), new File(karmaRuleFile));
} catch (IllegalInputOntologyException e) {
e.printStackTrace();
}
}
@Override
public void dispose() {
reasoner.dispose();
}
@Override
public AnswerTuples evaluate(String queryText) {
return evaluate(queryText, ConjunctiveQueryHelper.getAnswerVariables(queryText)[0], null);
}
@Override
public AnswerTuples evaluate(String queryText, String[] answerVars) {
return evaluate(queryText, answerVars, null);
}
public AnswerTuples evaluate(String queryText, AnswerTuples soundAnswerTuples) {
return evaluate(queryText, ConjunctiveQueryHelper.getAnswerVariables(queryText)[0], soundAnswerTuples);
}
public AnswerTuples evaluate(String queryText, String[] answerVars, AnswerTuples soundAnswerTuples) {
KarmaQuery karmaQuery = new KarmaQuery(queryText.replace("_:", "?"));
reasoner.setConcurrence(false);
ConjunctiveQuery cq = karmaQuery.getConjunctiveQuery();
if (cq == null) return null;
Set<AnswerTuple> answers = reasoner.answerCQ(cq, soundAnswerTuples, !queryText.contains("_:"));
return new AnswerTuplesImp(answerVars, answers);
}
@Override
public DataStore getDataStore() {
return reasoner.getStore();
}
public void initialiseKarma() {
try {
reasoner.initializeData(new File(karmaDataFile));
reasoner.materialise(new File(karmaRuleFile));
File tmp;
if (karmaDataFile != null && ((tmp = new File(karmaDataFile)).exists())) tmp.delete();
if (karmaRuleFile != null && ((tmp = new File(karmaRuleFile)).exists())) tmp.delete();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (JRDFStoreException e) {
e.printStackTrace();
}
}
}
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