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LocalModel.java
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LocalModel.java
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/**
* Copyright (C) 2022 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.rdf4j.connector;
import org.eclipse.rdf4j.model.*;
import org.eclipse.rdf4j.model.impl.LinkedHashModel;
import java.util.Collection;
/**
* Caches local transactional changes to the RDF4J repository model.
*/
class LocalModel {
private final Model addedStatements;
private final Model removedStatements;
enum Contains {
TRUE, FALSE, UNKNOWN
}
LocalModel() {
this.addedStatements = new LinkedHashModel();
this.removedStatements = new LinkedHashModel();
}
void enhanceStatements(Collection<Statement> statements, Resource subject, IRI property,
Value object, Collection<IRI> context) {
final Collection<Statement> added, removed;
final IRI[] ctxArray = context.toArray(new IRI[0]);
added = addedStatements.filter(subject, property, object, ctxArray);
removed = removedStatements.filter(subject, property, object, ctxArray);
statements.addAll(added);
statements.removeAll(removed);
}
Contains contains(Resource subject, IRI property, Value object, Collection<IRI> contexts) {
final IRI[] ctxArray = contexts.toArray(new IRI[0]);
if (addedStatements.contains(subject, property, object, ctxArray)) {
return Contains.TRUE;
}
return removedStatements.contains(subject, property, object, ctxArray) ? Contains.FALSE : Contains.UNKNOWN;
}
void addStatements(Collection<Statement> statements) {
removedStatements.removeAll(statements);
addedStatements.addAll(statements);
}
void removeStatements(Collection<Statement> statements) {
addedStatements.removeAll(statements);
removedStatements.addAll(statements);
}
Collection<Statement> getAddedStatements() {
return addedStatements;
}
Collection<Statement> getRemovedStatements() {
return removedStatements;
}
}