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JenaAdapter.java
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JenaAdapter.java
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package cz.cvut.kbss.ontodriver.jena;
import cz.cvut.kbss.ontodriver.Wrapper;
import cz.cvut.kbss.ontodriver.descriptor.*;
import cz.cvut.kbss.ontodriver.exception.OntoDriverException;
import cz.cvut.kbss.ontodriver.jena.connector.StorageConnector;
import cz.cvut.kbss.ontodriver.jena.exception.JenaDriverException;
import cz.cvut.kbss.ontodriver.jena.list.ListHandler;
import cz.cvut.kbss.ontodriver.jena.query.JenaPreparedStatement;
import cz.cvut.kbss.ontodriver.jena.query.JenaStatement;
import cz.cvut.kbss.ontodriver.jena.util.IdentifierGenerator;
import cz.cvut.kbss.ontodriver.model.Axiom;
import cz.cvut.kbss.ontodriver.util.Transaction;
import java.net.URI;
import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;
/**
* Transformations between OntoDriver API-based values and Jena-based ones.
* <p>
* Implementation notes:
* <ul>
* <li>Datatype literal types are based on Jena's mapping, as described in a table at <a href="https://jena.apache.org/documentation/notes/typed-literals.html">https://jena.apache.org/documentation/notes/typed-literals.html</a></li>
* </ul>
*/
public class JenaAdapter implements Wrapper {
private final Transaction transaction = new Transaction();
private final StorageConnector connector;
JenaAdapter(StorageConnector connector) {
this.connector = connector;
}
void commit() throws JenaDriverException {
if (transaction.isActive()) {
transaction.commit();
connector.commit();
transaction.afterCommit();
}
}
void rollback() {
if (transaction.isActive()) {
transaction.rollback();
connector.rollback();
transaction.afterRollback();
}
}
void persist(AxiomValueDescriptor descriptor) {
beginTransactionIfNotActive();
new AxiomSaver(connector).saveAxioms(descriptor);
}
private void beginTransactionIfNotActive() {
if (!transaction.isActive()) {
connector.begin();
transaction.begin();
}
}
Collection<Axiom<?>> find(AxiomDescriptor descriptor) {
beginTransactionIfNotActive();
// TODO
return new MainAxiomLoader(connector, null).find(descriptor);
}
boolean contains(Axiom<?> axiom, URI context) {
beginTransactionIfNotActive();
return new ExplicitAxiomLoader(connector).contains(axiom, context);
}
List<URI> getContext() {
beginTransactionIfNotActive();
return connector.getContexts().stream().map(URI::create).collect(Collectors.toList());
}
URI generateIdentifier(URI classUri) {
beginTransactionIfNotActive();
return new IdentifierGenerator(connector).generateIdentifier(classUri);
}
void update(AxiomValueDescriptor descriptor) {
beginTransactionIfNotActive();
new EpistemicAxiomRemover(connector).remove(descriptor);
new AxiomSaver(connector).saveAxioms(descriptor);
}
void remove(AxiomDescriptor descriptor) {
beginTransactionIfNotActive();
new EpistemicAxiomRemover(connector).remove(descriptor);
}
TypesHandler typesHandler() {
beginTransactionIfNotActive();
return new TypesHandler(connector);
}
PropertiesHandler propertiesHandler() {
beginTransactionIfNotActive();
return new PropertiesHandler(connector);
}
public ListHandler<SimpleListDescriptor, SimpleListValueDescriptor> simpleListHandler() {
beginTransactionIfNotActive();
return ListHandler.simpleListHandler(connector);
}
public ListHandler<ReferencedListDescriptor, ReferencedListValueDescriptor> referencedListHandler() {
beginTransactionIfNotActive();
return ListHandler.referencedListHandler(connector);
}
public JenaStatement createStatement() {
return new JenaStatement(connector);
}
public JenaPreparedStatement prepareStatement(String sparql) {
return new JenaPreparedStatement(connector, sparql);
}
void close() throws JenaDriverException {
connector.close();
}
@Override
public <T> T unwrap(Class<T> cls) throws OntoDriverException {
if (cls.isAssignableFrom(getClass())) {
return cls.cast(this);
}
return connector.unwrap(cls);
}
}