Package de.fuberlin.wiwiss.d2rq.examples

Source Code of de.fuberlin.wiwiss.d2rq.examples.JenaGraphExample

package de.fuberlin.wiwiss.d2rq.examples;

import java.util.Iterator;

import com.hp.hpl.jena.datatypes.xsd.XSDDatatype;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.graph.Triple;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.util.FileManager;
import com.hp.hpl.jena.vocabulary.DC;

import de.fuberlin.wiwiss.d2rq.jena.GraphD2RQ;
import de.fuberlin.wiwiss.d2rq.map.Mapping;
import de.fuberlin.wiwiss.d2rq.parser.MapParser;

public class JenaGraphExample {

  public static void main(String[] args) {
    // Load mapping file
    Model mapModel = FileManager.get().loadModel("doc/example/mapping-iswc.ttl");
   
    // Parse mapping file
    MapParser parser = new MapParser(mapModel, "http://localhost:2020/");
    Mapping mapping = parser.parse();
   
    // Set up the GraphD2RQ
    GraphD2RQ g = new GraphD2RQ(mapping);

    // Create a find(spo) pattern
    Node subject = Node.ANY;
    Node predicate = DC.date.asNode();
    Node object = Node.createLiteral("2003", null, XSDDatatype.XSDgYear);
    Triple pattern = new Triple(subject, predicate, object);

    // Query the graph
    Iterator<Triple> it = g.find(pattern);
   
    // Output query results
    while (it.hasNext()) {
      Triple t = it.next();
        System.out.println("Published in 2003: " + t.getSubject());
    }
    g.close();
  }
}
TOP

Related Classes of de.fuberlin.wiwiss.d2rq.examples.JenaGraphExample

TOP
Copyright © 2018 www.massapi.com. All rights reserved.
All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.