root/trunk/java/nepomuk_client/src/org/semanticdesktop/nepomuk/webapp/ExampleUsage.java

package org.semanticdesktop.nepomuk.webapp;

import java.util.List;

import org.ontoware.aifbcommons.collection.ClosableIterator;
import org.ontoware.rdf2go.model.Statement;
import org.ontoware.rdf2go.model.node.Variable;
import org.ontoware.rdf2go.vocabulary.RDF;
import org.semanticdesktop.nepomuk.clientservices.NepomukXmlRpcClient;
import org.semanticdesktop.services.NepomukServices;
import org.semanticdesktop.services.rdfrepository.Node;
import org.semanticdesktop.services.rdfrepository.QueryResultTable;
import org.semanticdesktop.services.rdfrepository.RDFRepository;
import org.semanticdesktop.services.rdfrepository.RDFRepositoryConst;

public class ExampleUsage {

        /**
         * @param args
         * @throws Exception 
         */
        public static void main(String[] args) throws Exception {
                NepomukXmlRpcClient client = new NepomukXmlRpcClient();
                NepomukServices services = client;
                System.out.println("And Zarathustra spoke: "+ services.getRdf2gorepository().echo("hello?"));
                System.out.println("So, lets dump 10 random types from the repo ");
                ClosableIterator<? extends Statement> i = services.getRdf2gorepository().getMainRepository().
                        findStatements(Variable.ANY, Variable.ANY, RDF.type, Variable.ANY);
                int c = 0;
                while (i.hasNext() && (c<10)) {
                        System.out.println(i.next().toString());
                        c++;
                }
                i.close();
                System.out.println("The same with RDFRepo");
                org.semanticdesktop.services.rdfrepository.Statement queryStatement = 
                        new org.semanticdesktop.services.rdfrepository.Statement(
                                        new org.semanticdesktop.services.rdfrepository.Node("", RDFRepositoryConst.NULLNODE),
                                        org.semanticdesktop.services.rdfrepository.Node.createURI(RDF.type.toString()),
                                        new org.semanticdesktop.services.rdfrepository.Node("", RDFRepositoryConst.NULLNODE),
                                        new org.semanticdesktop.services.rdfrepository.Node("", RDFRepositoryConst.NULLNODE)
                        );
                List<org.semanticdesktop.services.rdfrepository.Statement> reporesult = client.getRdfrepository().listStatements("main", queryStatement);
                c = 0;
                while (i.hasNext() && (c<10) && (c<reporesult.size())) {
                        System.out.println(reporesult.get(c));
                        c++;
                }
        System.out.println("A select query for all classes:");
        {
            QueryResultTable result = client.getRdfrepository().select(RDFRepository.MAIN_REPOSITORY_ID,
            "PREFIX rdfs:    <http://www.w3.org/2000/01/rdf-schema#> \n"
            + "PREFIX rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> \n"
            + "SELECT ?x WHERE {?x rdf:type rdfs:Class}", "sparql");
            List<List<Node>> rows = result.getRows();
            for (List<Node> row : rows)
            {
                for (Node node:row){
                    System.out.print(node.toString()+" | ");
                }
                System.out.println();
            }
        }
                System.err.flush();
                System.out.flush();
                System.out.print("Creating a new class: ");
                String starship = services.getPimoservice().createClass("Starship");
                System.out.println(starship);
                System.out.print("Creating the NCC 1701: ");
                String enterprise = services.getPimoservice().createResource("Enterprise NCC 1701", starship);
                System.out.println(enterprise);
                System.out.println("Deleting the NCC 1701.");
                services.getPimoservice().deleteResource(enterprise);
                System.out.println("Deleting the new class.");
                services.getPimoservice().deleteClass(starship);
                
                
                System.out.println("end.");
                
        }

}