/**
* This file is part of d:swarm graph extension.
*
* d:swarm graph extension 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.
*
* d:swarm graph extension 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 d:swarm graph extension. If not, see <http://www.gnu.org/licenses/>.
*/
package org.dswarm.graph.batch.rdf.parse;
import java.util.Optional;
import org.apache.jena.rdf.model.Property;
import org.apache.jena.rdf.model.RDFNode;
import org.apache.jena.rdf.model.Statement;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.dswarm.graph.DMPGraphException;
import org.dswarm.graph.NodeType;
import org.dswarm.graph.batch.parse.BaseNeo4jHandler;
import org.dswarm.graph.batch.rdf.RDFNeo4jProcessor;
import org.dswarm.graph.model.StatementBuilder;
import org.dswarm.graph.parse.Neo4jHandler;
import org.dswarm.graph.rdf.parse.RDFHandler;
import org.dswarm.graph.rdf.utils.NodeTypeUtils;
/**
* @author tgaengler
*/
public abstract class RDFNeo4jHandler implements RDFHandler {
private static final Logger LOG = LoggerFactory.getLogger(RDFNeo4jHandler.class);
protected final BaseNeo4jHandler handler;
protected final RDFNeo4jProcessor processor;
public RDFNeo4jHandler(final BaseNeo4jHandler handlerArg, final RDFNeo4jProcessor processorArg) throws DMPGraphException {
handler = handlerArg;
processor = processorArg;
}
@Override
public Neo4jHandler getHandler() {
return handler;
}
@Override
public void handleStatement(final Statement st) throws DMPGraphException {
final StatementBuilder sb = new StatementBuilder();
final RDFNode subject = st.getSubject();
final Optional<NodeType> optionalSubjectNodeType = NodeTypeUtils.getNodeType(Optional.of(subject));
sb.setOptionalSubjectNodeType(optionalSubjectNodeType);
processor.determineNode(subject, sb, true);
final Property predicate = st.getPredicate();
final String predicateName = predicate.getURI();
sb.setOptionalPredicateURI(Optional.ofNullable(predicateName));
final RDFNode object = st.getObject();
final Optional<NodeType> optionalObjectNodeType = NodeTypeUtils.getNodeType(Optional.of(object));
sb.setOptionalObjectNodeType(optionalObjectNodeType);
processor.determineNode(object, sb, false);
final org.dswarm.graph.model.Statement statement = sb.build();
handler.handleStatement(statement);
}
}