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package uk.ac.ox.cs.pagoda.reasoner;
import org.semanticweb.karma2.profile.ELHOProfile;
import org.semanticweb.owlapi.model.OWLOntology;
import uk.ac.ox.cs.pagoda.constraints.UnaryBottom;
import uk.ac.ox.cs.pagoda.query.AnswerTuples;
import uk.ac.ox.cs.pagoda.query.QueryRecord;
import uk.ac.ox.cs.pagoda.query.QueryRecord.Step;
import uk.ac.ox.cs.pagoda.reasoner.light.KarmaQueryEngine;
import uk.ac.ox.cs.pagoda.rules.LowerDatalogProgram;
import uk.ac.ox.cs.pagoda.util.Timer;
import uk.ac.ox.cs.pagoda.util.Utility;
class ELHOQueryReasoner extends QueryReasoner {
LowerDatalogProgram program;
OWLOntology elho_ontology;
KarmaQueryEngine elLowerStore = null;
private Timer t = new Timer();
public ELHOQueryReasoner() {
elLowerStore = new KarmaQueryEngine("el");
}
@Override
public void evaluate(QueryRecord queryRecord) {
AnswerTuples elAnswer = null;
t.reset();
try {
elAnswer = elLowerStore.evaluate(queryRecord.getQueryText(), queryRecord.getAnswerVariables());
queryRecord.updateLowerBoundAnswers(elAnswer);
} finally {
if (elAnswer != null) elAnswer.dispose();
}
queryRecord.addProcessingTime(Step.ELLowerBound, t.duration());
queryRecord.setDifficulty(Step.ELLowerBound);
queryRecord.markAsProcessed();
}
@Override
public void evaluateUpper(QueryRecord queryRecord) {
evaluate(queryRecord);
}
@Override
public void dispose() {
if (elLowerStore != null) elLowerStore.dispose();
super.dispose();
}
@Override
public void loadOntology(OWLOntology ontology) {
program = new LowerDatalogProgram(properties.getToClassify());
program.load(ontology, new UnaryBottom());
program.transform();
importData(program.getAdditionalDataFile());
elho_ontology = new ELHOProfile().getFragment(ontology);
elLowerStore.processOntology(elho_ontology);
}
@Override
public boolean preprocess() {
elLowerStore.importRDFData("data", importedData.toString());
String rlLowerProgramText = program.toString();
// program.save();
elLowerStore.materialise("lower program", rlLowerProgramText);
elLowerStore.initialiseKarma();
if (!isConsistent()) {
Utility.logDebug("The dataset is not consistent with the ontology.");
return false;
}
return true;
}
@Override
public boolean isConsistent() {
String[] X = new String[] {"X"};
AnswerTuples ans = null;
try {
ans = elLowerStore.evaluate(QueryRecord.botQueryText, X);
if (ans.isValid()) return false;
} finally {
if (ans != null) ans.dispose();
}
return true;
}
}
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