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FIX : RDF Conn Test

master
Kevin Shehu 2020-09-23 09:39:38 +02:00
parent e64bf080ff
commit c4286cf81f
2 changed files with 39 additions and 27 deletions
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26
src/main/java/RDFConnectionExample.java
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@ -1,24 +1,16 @@
import org.apache.jena.query.*; import org.apache.jena.query.Query;
import org.apache.jena.query.QueryFactory;
import org.apache.jena.query.ResultSetFormatter; import org.apache.jena.query.ResultSetFormatter;
import org.apache.jena.rdfconnection.RDFConnection; import org.apache.jena.rdfconnection.RDFConnectionFuseki;
import org.apache.jena.rdfconnection.RDFConnectionFactory; import org.apache.jena.rdfconnection.RDFConnectionRemoteBuilder;
import org.apache.jena.system.Txn;
public class RDFConnectionExample { public class RDFConnectionExample {
public static void main(String ...args) { public static void main(String ...args) {
Query query = QueryFactory.create("SELECT * { {?s ?p ?o } UNION { GRAPH ?g { ?s ?p ?o } } }");
Dataset dataset = DatasetFactory.createTxnMem();
RDFConnection conn = RDFConnectionFactory.connect(dataset);
Txn.executeWrite(conn, () ->{ RDFConnectionRemoteBuilder builder = RDFConnectionFuseki.create()
System.out.println("Load a file"); .destination("http://localhost:3030/fuseki");
conn.load("data.ttl");
conn.load("http://localhost:3030/GGD", "data.ttl");
System.out.println("In write transaction");
conn.queryResultSet(query, ResultSetFormatter::out);
});
// And again - implicit READ transaction.
System.out.println("After write transaction");
conn.queryResultSet(query, ResultSetFormatter::out);
} }
} }

34
src/main/java/main.java
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@ -1,28 +1,48 @@
import org.apache.jena.rdf.model.Model; import org.apache.jena.rdf.model.*;
import org.apache.jena.rdf.model.ModelFactory; import org.apache.jena.vocabulary.*;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.vocabulary.VCARD;
public class main { public class main {
public static void main (String args[]) { public static void main (String args[]) {
String personURI = "http://localhost:8080/JohnSmith";
// some definitions
String personURI = "http://localhost:3030/GGD/JohnSmith";
String givenName = "John"; String givenName = "John";
String familyName = "Smith"; String familyName = "Smith";
String fullName = givenName + " " + familyName; String fullName = givenName + " " + familyName;
// create an empty model // create an empty model
Model model = ModelFactory.createDefaultModel(); Model model = ModelFactory.createDefaultModel();
// create the resource // create the resource
// and add the properties cascading style // and add the properties cascading style
Resource johnSmith = model.createResource(personURI) Resource johnSmith
= model.createResource(personURI)
.addProperty(VCARD.FN, fullName) .addProperty(VCARD.FN, fullName)
.addProperty(VCARD.N, .addProperty(VCARD.N,
model.createResource() model.createResource()
.addProperty(VCARD.Given, givenName) .addProperty(VCARD.Given, givenName)
.addProperty(VCARD.Family, familyName)); .addProperty(VCARD.Family, familyName));
// list the statements in the graph
StmtIterator iter = model.listStatements();
// print out the predicate, subject and object of each statement
while (iter.hasNext()) {
Statement stmt = iter.nextStatement(); // get next statement
Resource subject = stmt.getSubject(); // get the subject
Property predicate = stmt.getPredicate(); // get the predicate
RDFNode object = stmt.getObject(); // get the object
System.out.print(subject.toString());
System.out.print(" " + predicate.toString() + " ");
if (object instanceof Resource) {
System.out.print(object.toString());
} else {
// object is a literal
System.out.print(" \"" + object.toString() + "\"");
}
System.out.println(" .");
}
} }
} }