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Rdf4jUpdateModule.java
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Rdf4jUpdateModule.java
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package cz.cvut.spipes.modules;
import cz.cvut.spipes.constants.KBSS_MODULE;
import cz.cvut.spipes.engine.ExecutionContext;
import org.eclipse.rdf4j.model.IRI;
import org.eclipse.rdf4j.model.Literal;
import org.eclipse.rdf4j.model.util.Values;
import org.eclipse.rdf4j.query.TupleQuery;
import org.eclipse.rdf4j.query.TupleQueryResult;
import org.eclipse.rdf4j.repository.Repository;
import org.eclipse.rdf4j.repository.RepositoryConnection;
import org.eclipse.rdf4j.repository.sparql.SPARQLRepository;
import java.io.File;
import java.io.IOException;
import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.SimpleFormatter;
public class Rdf4jUpdateModule extends AbstractModule{
private static final Logger logger = Logger.getLogger(Rdf4jUpdateModule.class.getName());
private static final String TYPE_URI = KBSS_MODULE.getURI()+"rdf4j-update";
private static final String PROPERTY_PREFIX_URI = KBSS_MODULE.getURI()+"rdf4j";
Repository queryRepository = new SPARQLRepository("http://localhost:8080/rdf4j-server/repositories/1");
Repository updateRepository = new SPARQLRepository("http://localhost:8080/rdf4j-server/repositories/1/statements");
private static void setLogger(){
logger.setLevel(Level.ALL);
logger.setUseParentHandlers(false);
FileHandler fh;
boolean dirCreated = new File("./LOGS/").mkdirs();
try {
fh = new FileHandler("./LOGS/testlogs.txt");
}catch (IOException e){
return;
}
fh.setFormatter(new SimpleFormatter());
logger.addHandler(fh);
}
@Override
ExecutionContext executeSelf() {
setLogger();
logger.info("executeSelf entered");
insertQuery();
selectQuery("SELECT* WHERE{ ?s ?p ?o }");
return this.executionContext;
}
void selectQuery(String query){
RepositoryConnection connection = queryRepository.getConnection();
TupleQuery tupleQuery = connection.prepareTupleQuery(query);
TupleQueryResult tupleQueryResult = tupleQuery.evaluate();
while(tupleQueryResult.hasNext()){
System.out.println(tupleQueryResult.next());
}
}
void insertQuery(){
RepositoryConnection connection = updateRepository.getConnection();
IRI john = Values.iri("http://example.org/people/john");
IRI name = Values.iri("http://example.org/ontology/name");
Literal johnName = Values.literal("John");
connection.add(john,name,johnName);
}
@Override
public String getTypeURI() {
return TYPE_URI;
}
@Override
public void loadConfiguration() {
}
}