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package uk.ac.ox.cs.pagoda.reasoner.light;
import org.semanticweb.HermiT.model.Constant;
import org.semanticweb.HermiT.model.Individual;
import org.semanticweb.HermiT.model.Term;
import uk.ac.ox.cs.JRDFox.JRDFStoreException;
import uk.ac.ox.cs.JRDFox.model.GroundTerm;
import uk.ac.ox.cs.JRDFox.store.TupleIterator;
import uk.ac.ox.cs.pagoda.query.AnswerTuple;
import uk.ac.ox.cs.pagoda.query.AnswerTuples;
import uk.ac.ox.cs.pagoda.util.Utility;
import uk.ac.ox.cs.pagoda.util.disposable.DisposedException;
public class RDFoxAnswerTuples extends AnswerTuples {
long multi;
TupleIterator m_iter;
String[] m_answerVars;
public RDFoxAnswerTuples(String[] answerVars, TupleIterator iter) {
m_answerVars = answerVars;
m_iter = iter;
reset();
}
public static Term getHermitTerm(GroundTerm t) {
if(t instanceof uk.ac.ox.cs.JRDFox.model.Individual) {
uk.ac.ox.cs.JRDFox.model.Individual individual = (uk.ac.ox.cs.JRDFox.model.Individual) t;
return Individual.create(individual.getIRI());
}
else {
uk.ac.ox.cs.JRDFox.model.Literal literal = ((uk.ac.ox.cs.JRDFox.model.Literal) t);
return Constant.create(literal.getLexicalForm(), literal.getDatatype().getIRI());
}
}
@Override
public boolean isValid() {
if(isDisposed()) throw new DisposedException();
return multi != 0;
}
@Override
public int getArity() {
if(isDisposed()) throw new DisposedException();
try {
return m_iter.getArity();
} catch (JRDFStoreException e) {
e.printStackTrace();
return -1;
}
}
@Override
public void moveNext() {
if(isDisposed()) throw new DisposedException();
try {
multi = m_iter.getNext();
} catch (JRDFStoreException e) {
e.printStackTrace();
}
}
@Override
public void dispose() {
super.dispose();
m_iter.dispose();
}
@Override
public AnswerTuple getTuple() {
if(isDisposed()) throw new DisposedException();
return new AnswerTuple(m_iter, m_answerVars.length);
}
@Override
public void reset() {
if(isDisposed()) throw new DisposedException();
try {
multi = m_iter.open();
} catch (JRDFStoreException e) {
e.printStackTrace();
}
}
@Override
public boolean contains(AnswerTuple t) {
if(isDisposed()) throw new DisposedException();
Utility.logError("Unsupported operation in RDFoxAnswerTuples");
return false;
}
@Override
public void remove() {
if(isDisposed()) throw new DisposedException();
Utility.logError("Unsupported operation in RDFoxAnswerTuples");
}
@Override
public String[] getAnswerVariables() {
if(isDisposed()) throw new DisposedException();
return m_answerVars;
}
protected void finalize() {
m_iter.dispose();
}
}
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