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AGRepositoryAdd.java

package com.franz.ag.repository.examples;



import static com.franz.ag.repository.examples.AGRepositoryValueFactory.*;



import java.io.FileInputStream;

import java.io.InputStream;

import java.net.URL;



import com.franz.ag.repository.AGRepository;

import com.franz.agbase.AllegroGraph;

import com.franz.agbase.AllegroGraphConnection;

import com.franz.agbase.AllegroGraphException;

import com.franz.agbase.examples.AGPaths;



import org.openrdf.model.Statement;

import org.openrdf.model.ValueFactory;

import org.openrdf.repository.Repository;

import org.openrdf.repository.RepositoryConnection;

import org.openrdf.rio.RDFFormat;



public class AGRepositoryAdd {



    /**

     * Demonstrates various ways of adding data to a repository. 

     * 

     * @param args unused

     * @throws AllegroGraphException

     */

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

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

        AllegroGraphConnection ags = new AllegroGraphConnection();

        try {

            ags.enable();

        } catch (Exception e) {

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

        }



        // Get a connection to a fresh repository

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

        Repository repo = new AGRepository(ts);

        repo.initialize();

        RepositoryConnection repoConn = repo.getConnection();

        

        // Load RDFXML from a URL into the null context

        repoConn.add(new URL("http://www.w3.org/TR/owl-guide/wine.rdf"), "", RDFFormat.RDFXML);

        System.out.println("Loaded " + repoConn.size() + " triples.");

        

        // Get the ValueFactory for the Repository and create some example values. 

        ValueFactory vf = repo.getValueFactory();

        createExampleValues(vf);



        repoConn.add(bob, name, nameBob);

        System.out.println("Check for added statement: " + 

                repoConn.hasStatement(bob, name, nameBob, false));

        

        Statement statement = vf.createStatement(alice, name, nameAlice);

        repoConn.add(statement);



        System.out.println("Check for added statement: " +

                repoConn.hasStatement(statement, false));

        System.out.println("Check for added statement: " +

                repoConn.hasStatement(alice, name, nameAlice, false));



        // Load Ntriples from a local file

        InputStream defaultGraph = new FileInputStream(AGPaths.dataSources("default-graph.nt"));

        try {

            repoConn.add(defaultGraph, "", RDFFormat.NTRIPLES);

        } finally {

            defaultGraph.close();

        }



        System.out.println("Repository contains newly added statements: " +

                repoConn.hasStatement(null, publisher, nameBob, false));

        System.out.println("Repository contains newly added statements: " +

                repoConn.hasStatement(null, publisher, nameAlice, false));



        // add file graph1.nt to context1

        InputStream graph1 = new FileInputStream(AGPaths.dataSources("graph1.nt"));

        try {

            repoConn.add(graph1, "", RDFFormat.NTRIPLES, context1);

        } finally {

            graph1.close();

        }



        // add file graph2.nt to context2

        InputStream graph2 = new FileInputStream(AGPaths.dataSources("graph2.nt"));

        try {

            repoConn.add(graph2, "", RDFFormat.NTRIPLES, context2);

        } finally {

            graph2.close();

        }



        System.out.println("alice is known in context1?: " +

                repoConn.hasStatement(null, name, nameAlice, false, context1));

        System.out.println("alice is known in context2?: " +

                repoConn.hasStatement(null, name, nameAlice, false, context2));



        System.out.println("bob is known in context2?: " +

                repoConn.hasStatement(null, name, nameBob, false, context2));

        System.out.println("bob is known in context1?: " +

                repoConn.hasStatement(null, name, nameBob, false, context1));



        // Shutdown the Repository, close the store and disconnect from the server

        repoConn.close();

        repo.shutDown();

        ts.closeTripleStore();

        ags.disable();

    }

}
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