org.mindswap.pellet.jena.graph.converter.AxiomConverter Maven / Gradle / Ivy
package org.mindswap.pellet.jena.graph.converter;
import org.mindswap.pellet.KnowledgeBase;
import org.mindswap.pellet.jena.JenaUtils;
import org.mindswap.pellet.jena.vocabulary.OWL2;
import org.mindswap.pellet.jena.vocabulary.SWRL;
import org.mindswap.pellet.utils.ATermUtils;
import aterm.ATermAppl;
import aterm.ATermList;
import com.hp.hpl.jena.graph.Graph;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.rdf.model.AnonId;
import com.hp.hpl.jena.rdf.model.Property;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.vocabulary.OWL;
import com.hp.hpl.jena.vocabulary.RDF;
import com.hp.hpl.jena.vocabulary.RDFS;
/**
*
* Title:
*
*
* Description: Converts axioms from ATerms to Jena triples.
*
*
* Copyright: Copyright (c) 2007
*
*
* Company: Clark & Parsia, LLC.
*
*
* @author Evren Sirin
*/
public class AxiomConverter {
private KnowledgeBase kb;
private ConceptConverter converter;
private Graph graph;
public AxiomConverter(KnowledgeBase kb, Graph g) {
this.kb = kb;
graph = g;
converter = new ConceptConverter( graph );
}
public void convert(ATermAppl axiom) {
if( axiom.getAFun().equals( ATermUtils.EQCLASSFUN ) ) {
convertBinary( axiom, OWL.equivalentClass );
}
else if( axiom.getAFun().equals( ATermUtils.SUBFUN ) ) {
convertBinary( axiom, RDFS.subClassOf );
}
else if( axiom.getAFun().equals( ATermUtils.DISJOINTFUN ) ) {
convertBinary( axiom, OWL.disjointWith );
}
else if( axiom.getAFun().equals( ATermUtils.DISJOINTSFUN ) ) {
convertNary( axiom, OWL2.AllDisjointClasses, OWL2.members );
}
else if( axiom.getAFun().equals( ATermUtils.EQPROPFUN ) ) {
convertBinary( axiom, OWL.equivalentProperty );
}
else if( axiom.getAFun().equals( ATermUtils.SUBPROPFUN ) ) {
if( axiom.getArgument( 0 ) instanceof ATermList ) {
Node s = converter.convert( axiom.getArgument( 1 ) );
Node o = converter.convert( axiom.getArgument( 0 ) );
TripleAdder.add( graph, s, OWL2.propertyChainAxiom, o );
}
else {
convertBinary( axiom, RDFS.subPropertyOf );
}
}
else if( axiom.getAFun().equals( ATermUtils.DISJOINTPROPFUN ) ) {
convertBinary( axiom, OWL2.propertyDisjointWith );
}
else if( axiom.getAFun().equals( ATermUtils.DISJOINTPROPSFUN ) ) {
convertNary( axiom, OWL2.AllDisjointProperties, OWL2.members );
}
else if( axiom.getAFun().equals( ATermUtils.DOMAINFUN ) ) {
convertBinary( axiom, RDFS.domain );
}
else if( axiom.getAFun().equals( ATermUtils.RANGEFUN ) ) {
convertBinary( axiom, RDFS.range );
}
else if( axiom.getAFun().equals( ATermUtils.INVPROPFUN ) ) {
convertBinary( axiom, OWL.inverseOf );
}
else if( axiom.getAFun().equals( ATermUtils.TRANSITIVEFUN ) ) {
convertUnary( axiom, OWL.TransitiveProperty );
}
else if( axiom.getAFun().equals( ATermUtils.FUNCTIONALFUN ) ) {
convertUnary( axiom, OWL.FunctionalProperty );
}
else if( axiom.getAFun().equals( ATermUtils.INVFUNCTIONALFUN ) ) {
convertUnary( axiom, OWL.InverseFunctionalProperty );
}
else if( axiom.getAFun().equals( ATermUtils.SYMMETRICFUN ) ) {
convertUnary( axiom, OWL.SymmetricProperty );
}
else if( axiom.getAFun().equals( ATermUtils.ASYMMETRICFUN ) ) {
convertUnary( axiom, OWL2.AsymmetricProperty );
}
else if( axiom.getAFun().equals( ATermUtils.REFLEXIVEFUN ) ) {
convertUnary( axiom, OWL2.ReflexiveProperty );
}
else if( axiom.getAFun().equals( ATermUtils.IRREFLEXIVEFUN ) ) {
convertUnary( axiom, OWL2.IrreflexiveProperty );
}
else if( axiom.getAFun().equals( ATermUtils.TYPEFUN ) ) {
convertBinary( axiom, RDF.type );
}
else if( axiom.getAFun().equals( ATermUtils.SAMEASFUN ) ) {
convertBinary( axiom, OWL.sameAs );
}
else if( axiom.getAFun().equals( ATermUtils.DIFFERENTFUN ) ) {
convertBinary( axiom, OWL.differentFrom );
}
else if( axiom.getAFun().equals( ATermUtils.ALLDIFFERENTFUN ) ) {
convertNary( axiom, OWL.AllDifferent, OWL2.members );
}
else if( axiom.getAFun().equals( ATermUtils.NOTFUN ) ) {
axiom = (ATermAppl) axiom.getArgument( 0 );
Node p = converter.convert( axiom.getArgument( 0 ) );
Node s = converter.convert( axiom.getArgument( 1 ) );
Node o = converter.convert( axiom.getArgument( 2 ) );
Node n = Node.createAnon();
TripleAdder.add( graph, n, RDF.type, OWL2.NegativePropertyAssertion );
TripleAdder.add( graph, n, RDF.subject, s );
TripleAdder.add( graph, n, RDF.predicate, p );
TripleAdder.add( graph, n, RDF.object, o );
}
else if( axiom.getAFun().equals( ATermUtils.PROPFUN ) ) {
Node p = converter.convert( axiom.getArgument( 0 ) );
Node s = converter.convert( axiom.getArgument( 1 ) );
Node o = converter.convert( axiom.getArgument( 2 ) );
TripleAdder.add( graph, s, p, o );
}
else if( axiom.getAFun().equals( ATermUtils.RULEFUN ) ) {
Node node = null;
ATermAppl name = (ATermAppl) axiom.getArgument( 0 );
if( name == ATermUtils.EMPTY ) {
node = Node.createAnon();
}
else if( ATermUtils.isBnode( name ) ) {
node = Node.createAnon( new AnonId( ((ATermAppl) name.getArgument( 0 )).getName() ) );
}
else {
node = Node.createURI( name.getName() );
}
TripleAdder.add( graph, node, RDF.type, SWRL.Imp );
ATermList head = (ATermList) axiom.getArgument( 1 );
if( head.isEmpty() ) {
TripleAdder.add( graph, node, SWRL.head, RDF.nil );
}
else {
Node list = null;
for( ; !head.isEmpty(); head = head.getNext() ) {
Node atomNode = convertAtom( (ATermAppl) head.getFirst() );
Node newList = Node.createAnon();
TripleAdder.add( graph, newList, RDF.type, SWRL.AtomList );
TripleAdder.add( graph, newList, RDF.first, atomNode );
if( list != null )
TripleAdder.add( graph, list, RDF.rest, newList );
else
TripleAdder.add( graph, node, SWRL.head, newList );
list = newList;
}
TripleAdder.add( graph, list, RDF.rest, RDF.nil );
}
ATermList body = (ATermList) axiom.getArgument( 2 );
if( body.isEmpty() ) {
TripleAdder.add( graph, node, SWRL.body, RDF.nil );
}
else {
Node list = null;
for( ; !body.isEmpty(); body = body.getNext() ) {
Node atomNode = convertAtom( (ATermAppl) body.getFirst() );
Node newList = Node.createAnon();
TripleAdder.add( graph, newList, RDF.type, SWRL.AtomList );
TripleAdder.add( graph, newList, RDF.first, atomNode );
if( list != null )
TripleAdder.add( graph, list, RDF.rest, newList );
else
TripleAdder.add( graph, node, SWRL.body, newList );
list = newList;
}
TripleAdder.add( graph, list, RDF.rest, RDF.nil );
}
}
}
private Node convertAtom(ATermAppl term) {
Node atom = Node.createAnon();
if( term.getAFun().equals( ATermUtils.TYPEFUN ) ) {
ATermAppl ind = (ATermAppl) term.getArgument( 0 );
ATermAppl cls = (ATermAppl) term.getArgument( 1 );
Node indNode = convertAtomObject( ind );
Node clsNode = converter.convert( cls );
TripleAdder.add( graph, atom, RDF.type, SWRL.ClassAtom );
TripleAdder.add( graph, atom, SWRL.classPredicate, clsNode );
TripleAdder.add( graph, atom, SWRL.argument1, indNode );
}
else if( term.getAFun().equals( ATermUtils.PROPFUN ) ) {
ATermAppl prop = (ATermAppl) term.getArgument( 0 );
ATermAppl arg1 = (ATermAppl) term.getArgument( 1 );
ATermAppl arg2 = (ATermAppl) term.getArgument( 2 );
Node propNode = JenaUtils.makeGraphNode( prop );
Node node1 = convertAtomObject( arg1 );
Node node2 = convertAtomObject( arg2 );
if( kb.isObjectProperty( prop ) ) {
TripleAdder.add( graph, atom, RDF.type, SWRL.IndividualPropertyAtom );
}
else if( kb.isDatatypeProperty( prop ) ) {
TripleAdder.add( graph, atom, RDF.type, SWRL.DatavaluedPropertyAtom );
}
else {
throw new UnsupportedOperationException( "Unknown property: " + prop );
}
TripleAdder.add( graph, atom, SWRL.propertyPredicate, propNode );
TripleAdder.add( graph, atom, SWRL.argument1, node1 );
TripleAdder.add( graph, atom, SWRL.argument2, node2 );
}
else if( term.getAFun().equals( ATermUtils.SAMEASFUN ) ) {
ATermAppl arg1 = (ATermAppl) term.getArgument( 1 );
ATermAppl arg2 = (ATermAppl) term.getArgument( 2 );
Node node1 = convertAtomObject( arg1 );
Node node2 = convertAtomObject( arg2 );
TripleAdder.add( graph, atom, RDF.type, SWRL.SameIndividualAtom );
TripleAdder.add( graph, atom, SWRL.argument1, node1 );
TripleAdder.add( graph, atom, SWRL.argument2, node2 );
}
else if( term.getAFun().equals( ATermUtils.DIFFERENTFUN ) ) {
ATermAppl arg1 = (ATermAppl) term.getArgument( 1 );
ATermAppl arg2 = (ATermAppl) term.getArgument( 2 );
Node node1 = convertAtomObject( arg1 );
Node node2 = convertAtomObject( arg2 );
TripleAdder.add( graph, atom, RDF.type, SWRL.DifferentIndividualsAtom );
TripleAdder.add( graph, atom, SWRL.argument1, node1 );
TripleAdder.add( graph, atom, SWRL.argument2, node2 );
}
else if( term.getAFun().equals( ATermUtils.BUILTINFUN ) ) {
ATermList args = (ATermList) term.getArgument( 0 );
ATermAppl builtin = (ATermAppl) args.getFirst();
args = args.getNext();
TripleAdder.add( graph, atom, RDF.type, SWRL.BuiltinAtom );
TripleAdder.add( graph, atom, SWRL.builtin, Node.createURI( builtin.toString() ) );
if( args.isEmpty() ) {
TripleAdder.add( graph, atom, SWRL.arguments, RDF.nil );
}
else {
Node list = null;
for( ; !args.isEmpty(); args = args.getNext() ) {
Node atomNode = convertAtomObject( (ATermAppl) args.getFirst() );
Node newList = Node.createAnon();
TripleAdder.add( graph, newList, RDF.first, atomNode );
if( list != null )
TripleAdder.add( graph, list, RDF.rest, newList );
else
TripleAdder.add( graph, atom, SWRL.arguments, newList );
list = newList;
}
TripleAdder.add( graph, list, RDF.rest, RDF.nil );
}
}
else {
throw new UnsupportedOperationException( "Unsupported atom: " + atom );
}
return atom;
}
private Node convertAtomObject(ATermAppl t) {
Node node;
if( ATermUtils.isVar( t ) ) {
node = JenaUtils.makeGraphNode( (ATermAppl) t.getArgument( 0 ) );
TripleAdder.add( graph, node, RDF.type, SWRL.Variable );
}
else {
node = JenaUtils.makeGraphNode( t );
}
return node;
}
private void convertNary(ATermAppl axiom, Resource type, Property p) {
Node n = Node.createAnon();
TripleAdder.add( graph, n, RDF.type, type );
ATermList concepts = (ATermList) axiom.getArgument( 0 );
converter.visitList( concepts );
TripleAdder.add( graph, n, p, converter.getResult() );
}
private void convertBinary(ATermAppl axiom, Property p) {
Node s = converter.convert( axiom.getArgument( 0 ) );
Node o = converter.convert( axiom.getArgument( 1 ) );
TripleAdder.add( graph, s, p, o );
}
private void convertUnary(ATermAppl axiom, Resource o) {
Node s = converter.convert( axiom.getArgument( 0 ) );
TripleAdder.add( graph, s, RDF.type.asNode(), o.asNode() );
}
}