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SimpleListHandler.java
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SimpleListHandler.java
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/**
* Copyright (C) 2020 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.jena.list;
import cz.cvut.kbss.ontodriver.descriptor.SimpleListDescriptor;
import cz.cvut.kbss.ontodriver.descriptor.SimpleListValueDescriptor;
import cz.cvut.kbss.ontodriver.jena.connector.StorageConnector;
import cz.cvut.kbss.ontodriver.model.NamedResource;
import org.apache.jena.rdf.model.Property;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.rdf.model.ResourceFactory;
import org.apache.jena.rdf.model.Statement;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import static org.apache.jena.rdf.model.ResourceFactory.createResource;
class SimpleListHandler extends ListHandler<SimpleListDescriptor, SimpleListValueDescriptor> {
SimpleListHandler(StorageConnector connector) {
super(connector);
}
@Override
SimpleListIterator iterator(SimpleListDescriptor descriptor) {
return new SimpleListIterator(descriptor, connector);
}
@Override
AbstractListIterator iterator(SimpleListValueDescriptor descriptor) {
return iterator((SimpleListDescriptor) descriptor);
}
@Override
void appendNewNodes(SimpleListValueDescriptor descriptor, int index, Resource lastNode) {
final Property hasList = ResourceFactory
.createProperty(descriptor.getListProperty().getIdentifier().toString());
final Property hasNext = ResourceFactory.createProperty(descriptor.getNextNode().getIdentifier().toString());
final List<Statement> toAdd = new ArrayList<>(descriptor.getValues().size() - index);
for (; index < descriptor.getValues().size(); index++) {
lastNode = appendNode(lastNode, index == 0 ? hasList : hasNext, descriptor.getValues().get(index), toAdd);
}
final URI context = descriptor.getContext();
connector.add(toAdd, context != null ? context.toString() : null);
}
private static Resource appendNode(Resource previous, Property property, NamedResource value,
List<Statement> statements) {
final Resource node = createResource(value.getIdentifier().toString());
statements.add(ResourceFactory.createStatement(previous, property, node));
return node;
}
}