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SesameDataSource.java
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SesameDataSource.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.sesame;
import cz.cvut.kbss.ontodriver.Connection;
import cz.cvut.kbss.ontodriver.DataSource;
import cz.cvut.kbss.ontodriver.OntologyStorageProperties;
import cz.cvut.kbss.ontodriver.exception.OntoDriverException;
import java.util.Collections;
import java.util.Map;
import java.util.Objects;
public class SesameDataSource implements DataSource {
private SesameDriver driver;
private volatile boolean open = true;
private boolean connected;
private OntologyStorageProperties storageProperties;
private Map<String, String> properties;
@Override
public synchronized void close() throws OntoDriverException {
if (!open) {
return;
}
try {
if (connected) {
driver.close();
}
} finally {
this.open = false;
}
}
@Override
public boolean isOpen() {
return open;
}
@Override
public synchronized Connection getConnection() throws OntoDriverException {
if (!open) {
throw new IllegalStateException("The data source is closed.");
}
if (!connected) {
connect();
}
return driver.acquireConnection();
}
@Override
public void setStorageProperties(OntologyStorageProperties storageProperties) throws OntoDriverException {
this.storageProperties = Objects.requireNonNull(storageProperties);
}
@Override
public void setProperties(Map<String, String> properties) throws OntoDriverException {
this.properties = Objects.requireNonNull(properties);
}
private void connect() {
if (storageProperties == null) {
throw new IllegalStateException("Cannot initialize OntoDriver without storageProperties configuration.");
}
if (properties == null) {
this.properties = Collections.emptyMap();
}
this.driver = new SesameDriver(storageProperties, properties);
this.connected = true;
}
}