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package uk.ac.ox.cs.pagoda.query;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
import uk.ac.ox.cs.pagoda.MyPrefixes;
//import uk.ac.ox.cs.pagoda.multistage.AnswerTupleID;
import uk.ac.ox.cs.pagoda.reasoner.light.BasicQueryEngine;
import uk.ac.ox.cs.pagoda.reasoner.light.RDFoxTripleManager;
import uk.ac.ox.cs.pagoda.util.Namespace;
import uk.ac.ox.cs.pagoda.util.Timer;
import uk.ac.ox.cs.pagoda.util.Utility;
import uk.ac.ox.cs.JRDFox.JRDFStoreException;
import uk.ac.ox.cs.JRDFox.store.DataStore;
import uk.ac.ox.cs.JRDFox.store.TupleIterator;
//public class GapByStore4ID extends GapTupleIterator<AnswerTupleID> {
public class GapByStore4ID extends GapTupleIterator<int[]> {
protected MyPrefixes prefixes = MyPrefixes.PAGOdAPrefixes;
protected TupleIterator iterator = null;
// AnswerTupleID tuple;
protected int[] tuple;
protected BasicQueryEngine m_engine;
protected DataStore m_store;
protected RDFoxTripleManager tripleManager;
public GapByStore4ID(BasicQueryEngine engine) {
m_engine = engine;
m_store = engine.getDataStore();
tripleManager = new RDFoxTripleManager(m_store, false);
}
protected long multi;
@Override
public void compile(String program) throws JRDFStoreException {
clear();
boolean incrementally = true;
Timer t = new Timer();
long oldTripleCount = m_store.getTriplesCount();
if (program != null) {
// m_store.addRules(new String[] {program});
m_store.importRules(program);
incrementally = false;
}
m_store.applyReasoning(incrementally);
long tripleCount = m_store.getTriplesCount();
Utility.logDebug("current store after materialising upper related rules: " + tripleCount + " (" + (tripleCount - oldTripleCount) + " new)",
"current store finished the materialisation of upper related rules in " + t.duration() + " seconds.");
m_engine.setExpandEquality(false);
iterator = m_engine.internal_evaluateAgainstIDBs("select ?x ?y ?z where { ?x ?y ?z . }");
m_engine.setExpandEquality(true);
multi = iterator.open();
Utility.logDebug("gap query evaluted ...");
}
@Override
public boolean hasNext() {
if (iterator == null) return false;
try {
// tuple = new AnswerTupleID(3);
tuple = new int[3];
Integer predicate;
for (; multi != 0; multi = iterator.getNext()) {
for (int i = 0; i < 3; ++i)
// tuple.setTerm(i, (int) iterator.getResourceID(i));
tuple[i] = (int) iterator.getResourceID(i);
if (isRDF_TYPE()) {
// predicate = getGapPredicateID(tuple.getTerm(2));
predicate = getGapPredicateID(tuple[2]);
if (predicate == null) continue;
// tuple.setTerm(2, predicate);
tuple[2] = predicate;
}
else {
// predicate = getGapPredicateID(tuple.getTerm(1));
predicate = getGapPredicateID(tuple[1]);
if (predicate == null) continue;
// tuple.setTerm(1, predicate);
tuple[1] = predicate;
}
return true;
}
} catch (JRDFStoreException e) {
e.printStackTrace();
return false;
}
return false;
}
@Override
// public AnswerTupleID next() {
public int[] next() {
try {
multi = iterator.getNext();
} catch (JRDFStoreException e) {
e.printStackTrace();
}
return tuple;
}
Map<Integer, Integer> original2gap = new HashMap<Integer, Integer>();
LinkedList<String> predicatesWithGap = new LinkedList<String>();
public LinkedList<String> getPredicatesWithGap() {
return predicatesWithGap;
}
protected Integer getGapPredicateID(int originalID) {
Integer gapID;
if ((gapID = original2gap.get(originalID)) != null)
return gapID;
String originalPredicate = tripleManager.getRawTerm(originalID);
if (isAuxPredicate(originalPredicate)) {
// Utility.LOGS.info(originalPredicate);
return null;
}
predicatesWithGap.add(originalPredicate);
String gapPredicate = prefixes.expandIRI(getGapPredicate(originalPredicate));
gapID = tripleManager.getResourceID(gapPredicate);
original2gap.put(originalID, gapID);
return gapID;
}
protected boolean isAuxPredicate(String originalPredicate) {
if (originalPredicate.equals(Namespace.EQUALITY_QUOTED)) return false;
return originalPredicate.contains("_AUX") ||
originalPredicate.startsWith("<" + Namespace.OWL_NS) ||
originalPredicate.startsWith("<" + Namespace.PAGODA_ORIGINAL);
}
protected boolean isRDF_TYPE() {
// return tripleManager.isRdfTypeID(tuple.getTerm(1));
return tripleManager.isRdfTypeID(tuple[1]);
}
@Override
public void remove() {
Utility.logError("Unsupported operation!");
}
@Override
public void save(String file) {
Utility.logError("Unsupported Operation...");
}
@Override
public void addBackTo() throws JRDFStoreException {
int tupleCounter = 0;
Timer t = new Timer();
long oldTripleCounter;
Utility.logDebug("current store before importing gap tuples: " + (oldTripleCounter = m_store.getTriplesCount()));
while (hasNext()) {
next();
++tupleCounter;
tripleManager.addTripleByID(tuple);
}
long tripleCounter = m_store.getTriplesCount();
Utility.logDebug("There are " + tupleCounter + " tuples in the gap between lower and upper bound materialisation.",
"current store after importing gap tuples: " + tripleCounter + " (" + (tripleCounter - oldTripleCounter) + ").",
"current store finished importing gap tuples: " + tripleCounter + " in " + t.duration() + ".");
}
public void clear() {
if (iterator != null) {
iterator.dispose();
iterator = null;
}
}
@Override
public void addTo(DataStore store) throws JRDFStoreException {
Utility.logError("Unsupported Operation...");
}
}
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