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OwlapiStatement.java
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OwlapiStatement.java
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/**
* Copyright (C) 2016 Czech Technical University in Prague
* <p>
* 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.
* <p>
* 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.owlapi.query;
import cz.cvut.kbss.ontodriver.ResultSet;
import cz.cvut.kbss.ontodriver.Statement;
import cz.cvut.kbss.ontodriver.exception.OntoDriverException;
import cz.cvut.kbss.ontodriver.owlapi.OwlapiConnection;
import java.util.Objects;
public class OwlapiStatement implements Statement {
private StatementOntology targetOntology;
private boolean open;
private final StatementExecutorFactory executorFactory;
final OwlapiConnection connection;
ResultSet resultSet;
public OwlapiStatement(StatementExecutorFactory executorFactory, OwlapiConnection connection) {
this.executorFactory = executorFactory;
this.connection = connection;
this.open = true;
}
void ensureOpen() {
if (!open) {
throw new IllegalStateException("The statement is closed.");
}
}
@Override
public ResultSet executeQuery(String sparql) throws OntoDriverException {
ensureOpen();
Objects.requireNonNull(sparql);
closeExistingResultSet();
this.resultSet = getExecutor().executeQuery(sparql, this);
return resultSet;
}
StatementExecutor getExecutor() {
return executorFactory.getStatementExecutor(targetOntology);
}
@Override
public void executeUpdate(String sparql) throws OntoDriverException {
ensureOpen();
Objects.requireNonNull(sparql);
closeExistingResultSet();
getExecutor().executeUpdate(sparql);
connection.commitIfAuto();
}
@Override
public void useOntology(StatementOntology ontology) {
this.targetOntology = ontology;
}
@Override
public StatementOntology getStatementOntology() {
return targetOntology;
}
@Override
public void close() throws Exception {
this.open = false;
closeExistingResultSet();
}
void closeExistingResultSet() throws OntoDriverException {
if (resultSet != null) {
resultSet.close();
this.resultSet = null;
}
}
}