/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Sep 16, 2009
*/
package com.bigdata.rdf.sail;
import org.openrdf.model.URI;
import org.openrdf.model.ValueFactory;
import org.openrdf.model.vocabulary.RDF;
import org.openrdf.model.vocabulary.RDFS;
import org.openrdf.query.QueryLanguage;
import org.openrdf.query.TupleQuery;
import org.openrdf.query.TupleQueryResult;
import org.openrdf.repository.sail.SailRepository;
import org.openrdf.repository.sail.SailRepositoryConnection;
import org.openrdf.sail.Sail;
import org.openrdf.sail.memory.MemoryStore;
/**
* @author <a href="mailto:mrpersonick@users.sourceforge.net">Mike Personick</a>
* @version $Id$
*/
public class TestSesameMultiGraphs {
public static void main(String[] args) throws Exception {
final Sail sail;
final SailRepository repo;
final SailRepositoryConnection cxn;
sail = new MemoryStore();
repo = new SailRepository(sail);
repo.initialize();
cxn = repo.getConnection();
cxn.setAutoCommit(false);
try {
final ValueFactory vf = sail.getValueFactory();
final String ns = "http://namespace/";
URI a = vf.createURI(ns+"a");
URI b = vf.createURI(ns+"b");
URI c = vf.createURI(ns+"c");
URI g1 = vf.createURI(ns+"graph1");
URI g2 = vf.createURI(ns+"graph2");
/**/
cxn.setNamespace("ns", ns);
cxn.add(a, b, c, g1, g2);
/*
* Note: The either flush() or commit() is required to flush the
* statement buffers to the database before executing any operations
* that go around the sail.
*/
cxn.commit();//
{
String query =
"PREFIX rdf: <"+RDF.NAMESPACE+"> " +
"PREFIX rdfs: <"+RDFS.NAMESPACE+"> " +
"PREFIX ns: <"+ns+"> " +
"select ?p ?o " +
"WHERE { " +
" ns:a ?p ?o . " +
"}";
final TupleQuery tupleQuery =
cxn.prepareTupleQuery(QueryLanguage.SPARQL, query);
TupleQueryResult result = tupleQuery.evaluate();
System.err.println("no dataset specified, RDF-MERGE, should produce one solution:");
while (result.hasNext()) {
System.err.println(result.next());
}
}
{
String query =
"PREFIX rdf: <"+RDF.NAMESPACE+"> " +
"PREFIX rdfs: <"+RDFS.NAMESPACE+"> " +
"PREFIX ns: <"+ns+"> " +
"select ?p ?o " +
"from <"+g1+">" +
"from <"+g2+">" +
"WHERE { " +
" ns:a ?p ?o . " +
"}";
final TupleQuery tupleQuery =
cxn.prepareTupleQuery(QueryLanguage.SPARQL, query);
TupleQueryResult result = tupleQuery.evaluate();
System.err.println("default graph query, RDF-MERGE, should produce one solution:");
while (result.hasNext()) {
System.err.println(result.next());
}
}
{
String query =
"PREFIX rdf: <"+RDF.NAMESPACE+"> " +
"PREFIX rdfs: <"+RDFS.NAMESPACE+"> " +
"PREFIX ns: <"+ns+"> " +
"select ?p ?o " +
"from named <"+g1+">" +
"from named <"+g2+">" +
"WHERE { " +
" graph ?g { ns:a ?p ?o . } " +
"}";
final TupleQuery tupleQuery =
cxn.prepareTupleQuery(QueryLanguage.SPARQL, query);
TupleQueryResult result = tupleQuery.evaluate();
System.err.println("named graph query, no RDF-MERGE, should produce two solutions:");
while (result.hasNext()) {
System.err.println(result.next());
}
}
} finally {
cxn.close();
sail.shutDown();
}
}
}