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ConnectionStatementExecutor.java
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ConnectionStatementExecutor.java
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/**
* Copyright (C) 2019 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.sesame.connector;
import cz.cvut.kbss.ontodriver.sesame.exceptions.SesameDriverException;
import org.eclipse.rdf4j.query.*;
import org.eclipse.rdf4j.repository.RepositoryConnection;
import org.eclipse.rdf4j.repository.RepositoryException;
/**
* Actual implementation of statement processing.
*/
class ConnectionStatementExecutor implements StatementExecutor {
private final RepositoryConnection connection;
ConnectionStatementExecutor(RepositoryConnection connection) {
this.connection = connection;
}
@Override
public TupleQueryResult executeSelectQuery(String query) throws SesameDriverException {
try {
final TupleQuery tq = connection.prepareTupleQuery(QueryLanguage.SPARQL, query);
return new QueryResult(tq.evaluate(), connection);
} catch (MalformedQueryException | QueryEvaluationException | RepositoryException e) {
throw new SesameDriverException(e);
}
}
@Override
public boolean executeBooleanQuery(String query) throws SesameDriverException {
try {
return connection.prepareBooleanQuery(QueryLanguage.SPARQL, query).evaluate();
} catch (MalformedQueryException | QueryEvaluationException | RepositoryException e) {
throw new SesameDriverException(e);
}
}
@Override
public void executeUpdate(String query) throws SesameDriverException {
try {
final Update u = connection.prepareUpdate(QueryLanguage.SPARQL, query);
u.execute();
} catch (MalformedQueryException | UpdateExecutionException | RepositoryException e) {
throw new SesameDriverException(e);
}
}
}