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package uk.ac.ox.cs.pagoda.summary;
import java.io.File;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
import org.semanticweb.HermiT.model.Atom;
import org.semanticweb.HermiT.model.DLClause;
import org.semanticweb.HermiT.model.Individual;
import org.semanticweb.HermiT.model.Term;
import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLAxiom;
import org.semanticweb.owlapi.model.OWLClassAssertionAxiom;
import org.semanticweb.owlapi.model.OWLDataFactory;
import org.semanticweb.owlapi.model.OWLDataPropertyAssertionAxiom;
import org.semanticweb.owlapi.model.OWLLiteral;
import org.semanticweb.owlapi.model.OWLNamedIndividual;
import org.semanticweb.owlapi.model.OWLObjectProperty;
import org.semanticweb.owlapi.model.OWLObjectPropertyAssertionAxiom;
import org.semanticweb.owlapi.model.OWLOntology;
import org.semanticweb.owlapi.model.OWLOntologyCreationException;
import org.semanticweb.owlapi.model.OWLOntologyManager;
import org.semanticweb.owlapi.model.OWLOntologyStorageException;
import uk.ac.ox.cs.JRDFox.model.GroundTerm;
import uk.ac.ox.cs.JRDFox.model.Literal;
import uk.ac.ox.cs.pagoda.owl.OWLHelper;
import uk.ac.ox.cs.pagoda.query.AnswerTuple;
import uk.ac.ox.cs.pagoda.query.QueryRecord;
import uk.ac.ox.cs.pagoda.util.Namespace;
import uk.ac.ox.cs.pagoda.util.SparqlHelper;
import uk.ac.ox.cs.pagoda.util.Utility;
public class Summary {
OWLOntologyManager manager;
OWLDataFactory factory;
OWLOntology ontology, summarisedOntology;
Graph graph;
public Summary(OWLOntology ontology) {
OWLHelper.identifyAndChangeAnnotationAssertions(ontology);
this.ontology = ontology;
graph = new Graph(ontology);
factory = (manager = ontology.getOWLOntologyManager()).getOWLDataFactory();
}
public Summary(OWLOntology ontology, Graph graph) {
this.ontology = ontology;
this.graph = graph;
factory = (manager = ontology.getOWLOntologyManager()).getOWLDataFactory();
}
Map<String, String> label2representative = new HashMap<String, String>();
Map<String, String> representatives = new HashMap<String, String>();
public Collection<String> getRepresentatives() {
return representatives.values();
}
Map<String, LinkedList<String>> groups = null;
public Collection<String> getGroup(String representative) {
if (groups == null) {
groups = new HashMap<String, LinkedList<String>>();
LinkedList<String> group;
for (Map.Entry<String, String> entry: representatives.entrySet()) {
if ((group = groups.get(entry.getValue())) == null)
group = new LinkedList<String>();
group.add(entry.getKey());
}
}
return groups.get(representative);
}
private void process(OWLOntology ontology, OWLOntology abstractOntology) {
OWLOntologyManager manager = ontology.getOWLOntologyManager();
groupIndividualsByConcepts();
manager.addAxioms(abstractOntology, ontology.getRBoxAxioms(true));
manager.addAxioms(abstractOntology, ontology.getTBoxAxioms(true));
OWLAxiom newAxiom;
for (OWLAxiom axiom: ontology.getABoxAxioms(true)) {
newAxiom = summeriseAxiom(axiom);
manager.addAxiom(abstractOntology, newAxiom);
}
OWLObjectProperty sameAs = factory.getOWLObjectProperty(IRI.create(Namespace.EQUALITY));
for (Map.Entry<String, String> entry: representatives.entrySet())
if (!entry.getKey().equals(entry.getValue()))
manager.addAxiom(abstractOntology,
factory.getOWLObjectPropertyAssertionAxiom(
sameAs,
factory.getOWLNamedIndividual(IRI.create(entry.getKey())),
factory.getOWLNamedIndividual(IRI.create(entry.getValue()))));
}
private void groupIndividualsByConcepts() {
String name, label, representative;
Utility.logDebug("grouping individuals by its concepts");
for (Node node: graph.getNodes()) {
name = node.getName();
label = node.getLabel();
if ((representative = label2representative.get(label)) == null) {
representative = name;
label2representative.put(label, name);
}
representatives.put(name, representative);
}
}
private OWLAxiom summeriseAxiom(OWLAxiom axiom) {
if (axiom instanceof OWLClassAssertionAxiom) {
OWLClassAssertionAxiom assertion = (OWLClassAssertionAxiom) axiom;
OWLNamedIndividual a = getRepresentativeIndividual(assertion.getIndividual().toStringID());
return factory.getOWLClassAssertionAxiom(assertion.getClassExpression(), a);
}
else if (axiom instanceof OWLObjectPropertyAssertionAxiom) {
OWLObjectPropertyAssertionAxiom assertion = (OWLObjectPropertyAssertionAxiom) axiom;
OWLNamedIndividual a = getRepresentativeIndividual(assertion.getSubject().toStringID());
OWLNamedIndividual b = getRepresentativeIndividual(assertion.getObject().toStringID());
return factory.getOWLObjectPropertyAssertionAxiom(assertion.getProperty(), a, b);
}
else if (axiom instanceof OWLDataPropertyAssertionAxiom) {
OWLDataPropertyAssertionAxiom assertion = (OWLDataPropertyAssertionAxiom) axiom;
OWLNamedIndividual a = getRepresentativeIndividual(assertion.getSubject().toStringID());
OWLLiteral b = assertion.getObject();
return factory.getOWLDataPropertyAssertionAxiom(assertion.getProperty(), a, b);
}
else {
Utility.logError("Unknown axiom: " + axiom);
return null;
}
}
public OWLNamedIndividual getRepresentativeIndividual(String name) {
return factory.getOWLNamedIndividual(IRI.create(getRepresentativeName(name)));
}
public String getRepresentativeName(String name) {
String rep = representatives.get(name);
if (rep == null) return name;
return rep;
}
public OWLOntology getSummary() {
if (summarisedOntology == null) {
try {
summarisedOntology = ontology.getOWLOntologyManager().createOntology();
} catch (OWLOntologyCreationException e) {
summarisedOntology = null;
e.printStackTrace();
}
process(ontology, summarisedOntology);
}
return summarisedOntology;
}
public void save(String fileName) {
try {
manager.saveOntology(summarisedOntology, IRI.create(new File(fileName)));
} catch (OWLOntologyStorageException e) {
e.printStackTrace();
}
}
private GroundTerm getSummary(GroundTerm t) {
if (t instanceof Literal) return t;
return uk.ac.ox.cs.JRDFox.model.Individual.create(getSummary(((uk.ac.ox.cs.JRDFox.model.Individual) t).getIRI()));
}
public String getSummary(QueryRecord record) {
DLClause queryClause = getSummary(record.getClause());
return SparqlHelper.getSPARQLQuery(queryClause.getBodyAtoms(), record.getAnswerVariables());
}
public DLClause getSummary(DLClause clause) {
Atom[] newHeadAtoms = new Atom[clause.getHeadLength()], newBodyAtoms = new Atom[clause.getBodyLength()];
int index = 0;
for (Atom atom: clause.getHeadAtoms())
newHeadAtoms[index++] = getSummary(atom);
for (Atom atom: clause.getBodyAtoms())
newBodyAtoms[index++] = getSummary(atom);
return DLClause.create(newHeadAtoms, newBodyAtoms);
}
public Atom getSummary(Atom atom) {
Term[] args = new Term [atom.getArity()];
for (int i = 0; i < atom.getArity(); ++i)
if ((args[i] = atom.getArgument(i)) instanceof Individual)
args[i] = Individual.create(getSummary(atom.getArgument(i).toString()));
return Atom.create(atom.getDLPredicate(), args);
}
public String getSummary(String name) {
return getRepresentativeName(OWLHelper.removeAngles(name));
}
public AnswerTuple getSummary(AnswerTuple answer) {
int arity = answer.getArity();
GroundTerm[] t = new GroundTerm[arity];
for (int i = 0; i < arity; ++i)
t[i] = getSummary(answer.getGroundTerm(i));
return new AnswerTuple(t);
}
}
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