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AGJenaModelInterface.java

package com.franz.agjena.examples;





import com.franz.agbase.AllegroGraph;

import com.franz.agbase.AllegroGraphConnection;

import com.franz.agbase.AllegroGraphException;

import com.franz.agbase.examples.AGPaths;

import com.franz.agjena.AllegroGraphGraphMaker;

import com.franz.agjena.AllegroGraphModel;

import com.hp.hpl.jena.graph.Graph;

import com.hp.hpl.jena.graph.GraphMaker;

import com.hp.hpl.jena.rdf.model.Model;

import com.hp.hpl.jena.rdf.model.Resource;

import com.hp.hpl.jena.vocabulary.DC;



public class AGJenaModelInterface {



    /**

     * Demonstrates the Jena Model interface to AllegroGraph.

     *

     * @param args unused

     * @throws AllegroGraphException

     */

    public static void main(String[] args) throws AllegroGraphException {

        // Connect to server, which must already be running.

        AllegroGraphConnection ags = new AllegroGraphConnection();

        try {

            ags.enable();

        } catch (Exception e) {

            throw new AllegroGraphException("Server connection problem", e);

        }



        // Create a fresh triple store

        AllegroGraph ts = ags.renew("store", AGPaths.TRIPLE_STORES);

        GraphMaker maker = new AllegroGraphGraphMaker(ts);

        Graph defaultGraph = maker.getGraph();

        Model model = new AllegroGraphModel(defaultGraph);

        

        // Add some data to the default graph

        Resource r1 = model.createResource("http://example.org/book#1") ;

        Resource r2 = model.createResource("http://example.org/book#2") ;

        r1.addProperty(DC.title, "SPARQL - the book")

          .addProperty(DC.description, "A book about SPARQL");

        r2.addProperty(DC.title, "Advanced techniques for SPARQL");

        

        AGJenaUtils.printModel(model);

        

        // Add the same data to a named graph

        Graph namedGraph = maker.createGraph("http://example.org/graph");

        model = new AllegroGraphModel(namedGraph);

        

        r1 = model.createResource("http://example.org/book#1") ;

        r2 = model.createResource("http://example.org/book#2") ;

        r1.addProperty(DC.title, "SPARQL - the book")

          .addProperty(DC.description, "A book about SPARQL");

        r2.addProperty(DC.title, "Advanced techniques for SPARQL");

        

        AGJenaUtils.printModel(model);

        

        // Close the store and disconnect from the server

        ts.closeTripleStore();

        ags.disable();

    }



}
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