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EpistemicAxiomRemover.java
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EpistemicAxiomRemover.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.StorageConnector;
import org.apache.jena.rdf.model.Property;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.rdf.model.ResourceFactory;
import java.net.URI;
/**
* This class performs an epistemic removal of statements.
* <p/>
* Epistemic remove means that only information known to the application is
* deleted. The assertions in the descriptor represent this information. Thus,
* only statements representing these properties are removed from the ontology. Note that if the
* descriptor contains an unspecified property assertion, all property
* assertions related to the subject individual are removed from the property's
* context.
*/
class EpistemicAxiomRemover {
private final StorageConnector connector;
EpistemicAxiomRemover(StorageConnector connector) {
this.connector = connector;
}
/**
* Removes statements corresponding to the subject and properties specified by the descriptor.
*
* @param descriptor Descriptor of statements to remove
*/
void remove(AxiomDescriptor descriptor) {
final Resource subject = ResourceFactory.createResource(descriptor.getSubject().getIdentifier().toString());
descriptor.getAssertions().stream().filter(a -> !a.isInferred()).forEach(assertion -> {
final URI context = descriptor.getAssertionContext(assertion);
final Property property = ResourceFactory.createProperty(assertion.getIdentifier().toString());
if (context != null) {
connector.remove(subject, property, null, context.toString());
} else {
connector.remove(subject, property, null);
}
});
}
}