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SesameValueConverter.java
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SesameValueConverter.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.model.Assertion;
import cz.cvut.kbss.ontodriver.sesame.exceptions.SesameDriverException;
import cz.cvut.kbss.ontodriver.sesame.util.SesameUtils;
import org.eclipse.rdf4j.model.IRI;
import org.eclipse.rdf4j.model.Value;
import org.eclipse.rdf4j.model.ValueFactory;
class SesameValueConverter {
private ValueFactory vf;
private String language;
SesameValueConverter(ValueFactory vf, String language) {
this.vf = vf;
this.language = language;
}
Value toSesameValue(Assertion assertion, cz.cvut.kbss.ontodriver.model.Value<?> val) throws SesameDriverException {
switch (assertion.getType()) {
case DATA_PROPERTY:
return SesameUtils.createDataPropertyLiteral(val.getValue(), language(assertion), vf);
case CLASS:
case OBJECT_PROPERTY:
return getValueAsSesameUri(val);
case ANNOTATION_PROPERTY: // Intentional fall-through
case PROPERTY:
return resolvePropertyValue(assertion, val);
default:
// Failsafe
throw new IllegalArgumentException("Unsupported assertion type " + assertion.getType());
}
}
private String language(Assertion assertion) {
return assertion.hasLanguage() ? assertion.getLanguage() : language;
}
private IRI getValueAsSesameUri(cz.cvut.kbss.ontodriver.model.Value<?> val) throws SesameDriverException {
try {
return vf.createIRI(val.getValue().toString());
} catch (IllegalArgumentException e) {
throw new SesameDriverException(e);
}
}
private Value resolvePropertyValue(Assertion assertion, cz.cvut.kbss.ontodriver.model.Value<?> val) {
if (SesameUtils.isResourceIdentifier(val.getValue())) {
return vf.createIRI(val.getValue().toString());
} else {
return SesameUtils.createDataPropertyLiteral(val.getValue(), language(assertion), vf);
}
}
}