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InferredAxiomLoader.java
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InferredAxiomLoader.java
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package cz.cvut.kbss.ontodriver.jena;
import cz.cvut.kbss.ontodriver.descriptor.AxiomDescriptor;
import cz.cvut.kbss.ontodriver.jena.connector.InferredStorageConnector;
import cz.cvut.kbss.ontodriver.model.Assertion;
import cz.cvut.kbss.ontodriver.model.Axiom;
import cz.cvut.kbss.ontodriver.model.AxiomImpl;
import cz.cvut.kbss.ontodriver.model.Value;
import org.apache.jena.rdf.model.Property;
import org.apache.jena.rdf.model.RDFNode;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.rdf.model.Statement;
import java.net.URI;
import java.util.*;
import static org.apache.jena.rdf.model.ResourceFactory.createProperty;
import static org.apache.jena.rdf.model.ResourceFactory.createResource;
class InferredAxiomLoader extends AbstractAxiomLoader {
private final InferredStorageConnector connector;
InferredAxiomLoader(InferredStorageConnector connector) {
this.connector = connector;
this.inferred = true;
}
@Override
boolean contains(Resource subject, Property property, RDFNode object, URI context) {
return connector.containsWithInference(subject, property, object, context != null ? context.toString() : null);
}
@Override
List<Axiom<?>> find(AxiomDescriptor descriptor, Map<String, Assertion> assertions) {
final List<Axiom<?>> result = new ArrayList<>();
final Resource subject = createResource(descriptor.getSubject().getIdentifier().toString());
for (Assertion a : assertions.values()) {
final Property property = createProperty(a.getIdentifier().toString());
final Collection<Statement> statements =
findStatements(subject, property, descriptor.getAssertionContext(a));
statements.forEach(s -> {
final Optional<Value<?>> value = resolveValue(a, s.getObject());
value.ifPresent(v -> result.add(new AxiomImpl<>(descriptor.getSubject(), a, v)));
});
}
return result;
}
@Override
Collection<Statement> findStatements(Resource subject, Property property, URI context) {
return connector.findWithInference(subject, property, null, context != null ? context.toString() : null);
}
}