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Rdf4jConnection.java
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Rdf4jConnection.java
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/**
* Copyright (C) 2022 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.ontodriver.rdf4j;
import cz.cvut.kbss.ontodriver.*;
import cz.cvut.kbss.ontodriver.Properties;
import cz.cvut.kbss.ontodriver.descriptor.AxiomDescriptor;
import cz.cvut.kbss.ontodriver.descriptor.AxiomValueDescriptor;
import cz.cvut.kbss.ontodriver.exception.IdentifierGenerationException;
import cz.cvut.kbss.ontodriver.exception.OntoDriverException;
import cz.cvut.kbss.ontodriver.model.Axiom;
import cz.cvut.kbss.ontodriver.rdf4j.exception.Rdf4jDriverException;
import cz.cvut.kbss.ontodriver.rdf4j.query.Rdf4jPreparedStatement;
import cz.cvut.kbss.ontodriver.rdf4j.query.Rdf4jStatement;
import java.net.URI;
import java.util.*;
import static cz.cvut.kbss.ontodriver.util.ErrorUtils.getNPXMessageSupplier;
class Rdf4jConnection implements Connection {
private final Rdf4jAdapter adapter;
private boolean open;
private boolean autoCommit;
private Lists lists;
private Types types;
private Properties properties;
private ConnectionListener<Rdf4jConnection> listener;
Rdf4jConnection(Rdf4jAdapter adapter) {
assert adapter != null;
this.adapter = adapter;
this.open = true;
}
void setLists(Rdf4jLists lists) {
this.lists = lists;
}
void setTypes(Rdf4jTypes types) {
this.types = types;
}
public void setProperties(Properties properties) {
this.properties = properties;
}
void setListener(ConnectionListener<Rdf4jConnection> listener) {
ensureOpen();
assert listener != null;
this.listener = listener;
}
void removeListener() {
this.listener = null;
}
@Override
public void close() throws Exception {
if (!open) {
return;
}
try {
adapter.close();
if (listener != null) {
listener.connectionClosed(this);
}
} finally {
this.open = false;
}
}
@Override
public boolean isOpen() {
return open;
}
@Override
public void commit() throws OntoDriverException {
ensureOpen();
if (autoCommit) {
return;
}
adapter.commit();
}
@Override
public void rollback() throws OntoDriverException {
ensureOpen();
if (autoCommit) {
return;
}
adapter.rollback();
}
@Override
public void setAutoCommit(boolean autoCommit) {
ensureOpen();
this.autoCommit = autoCommit;
}
@Override
public boolean isAutoCommit() {
ensureOpen();
return autoCommit;
}
@Override
public Statement createStatement() {
ensureOpen();
return new Rdf4jStatement(adapter.getQueryExecutor());
}
@Override
public PreparedStatement prepareStatement(String sparql) {
ensureOpen();
Objects.requireNonNull(sparql);
if (sparql.isEmpty()) {
throw new IllegalArgumentException("The value for prepared statement cannot be empty.");
}
return new Rdf4jPreparedStatement(adapter.getQueryExecutor(), sparql);
}
@Override
public boolean isConsistent(URI context) {
ensureOpen();
return adapter.isConsistent(context);
}
@Override
public List<URI> getContexts() throws OntoDriverException {
ensureOpen();
return adapter.getContexts();
}
@Override
public URI generateIdentifier(URI classUri) throws OntoDriverException {
ensureOpen();
Objects.requireNonNull(classUri);
try {
return adapter.generateIdentifier(classUri);
} catch (IdentifierGenerationException e) {
throw new Rdf4jDriverException(e);
}
}
@Override
public boolean contains(Axiom<?> axiom, Set<URI> contexts) throws OntoDriverException {
ensureOpen();
Objects.requireNonNull(axiom, getNPXMessageSupplier("axiom"));
Objects.requireNonNull(contexts);
return adapter.contains(axiom, contexts);
}
@Override
public Collection<Axiom<?>> find(AxiomDescriptor descriptor) throws OntoDriverException {
ensureOpen();
Objects.requireNonNull(descriptor);
try {
return adapter.find(descriptor);
} catch (RuntimeException e) {
throw new Rdf4jDriverException(e);
}
}
@Override
public void persist(AxiomValueDescriptor descriptor) throws OntoDriverException {
ensureOpen();
Objects.requireNonNull(descriptor);
try {
adapter.persist(descriptor);
commitIfAuto();
} catch (RuntimeException e) {
throw new Rdf4jDriverException(e);
}
}
@Override
public void update(AxiomValueDescriptor descriptor) throws OntoDriverException {
ensureOpen();
Objects.requireNonNull(descriptor);
try {
adapter.update(descriptor);
commitIfAuto();
} catch (RuntimeException e) {
throw new Rdf4jDriverException(e);
}
}
@Override
public void remove(AxiomDescriptor descriptor) throws OntoDriverException {
ensureOpen();
Objects.requireNonNull(descriptor);
try {
adapter.remove(descriptor);
commitIfAuto();
} catch (RuntimeException e) {
throw new Rdf4jDriverException(e);
}
}
@Override
public Lists lists() {
ensureOpen();
assert lists != null;
return lists;
}
@Override
public Types types() {
ensureOpen();
assert types != null;
return types;
}
@Override
public Properties properties() {
ensureOpen();
assert properties != null;
return properties;
}
void ensureOpen() {
if (!open) {
throw new IllegalStateException("This connection is closed.");
}
}
void commitIfAuto() throws Rdf4jDriverException {
if (autoCommit) {
adapter.commit();
}
}
@Override
public <T> T unwrap(Class<T> cls) throws OntoDriverException {
if (cls.isAssignableFrom(this.getClass())) {
return cls.cast(this);
}
return adapter.unwrap(cls);
}
}