/*
* (c) Copyright 2008, 2009 Hewlett-Packard Development Company, LP
* (c) Copyright 2010 Epimorphics Ltd.
* All rights reserved.
* [See end of file]
*/
package tdb.examples;
import com.hp.hpl.jena.query.Dataset ;
import com.hp.hpl.jena.query.Query ;
import com.hp.hpl.jena.query.QueryExecution ;
import com.hp.hpl.jena.query.QueryExecutionFactory ;
import com.hp.hpl.jena.query.QueryFactory ;
import com.hp.hpl.jena.query.QuerySolution ;
import com.hp.hpl.jena.query.ResultSet ;
import com.hp.hpl.jena.tdb.TDBFactory ;
/** Example of creating a TDB-backed model.
* The preferred way is to create a dataset then get the mode required from the dataset.
* The dataset can be used for SPARQL query and update
* but the Model (or Graph) can also be used.
*
* All the Jena APIs work on the model.
*
* Calling TDBFactory is the only place TDB-specific code is needed.
*/
public class ExTDB5
{
public static void main(String... argv)
{
// Direct way: Make a TDB-back Jena model in the named directory.
String directory = "MyDatabases/DB1" ;
Dataset dataset = TDBFactory.createDataset(directory) ;
// Potentially expensive query.
String sparqlQueryString = "SELECT (count(*) AS ?count) { ?s ?p ?o }" ;
// See http://www.openjena.org/ARQ/app_api.html
Query query = QueryFactory.create(sparqlQueryString) ;
QueryExecution qexec = QueryExecutionFactory.create(query, dataset) ;
try {
ResultSet results = qexec.execSelect() ;
for ( ; results.hasNext() ; )
{
QuerySolution soln = results.nextSolution() ;
int count = soln.getLiteral("count").getInt() ;
System.out.println("count = "+count) ;
}
} finally { qexec.close() ; }
// Close the dataset.
dataset.close();
}
}
/*
* (c) Copyright 2008, 2009 Hewlett-Packard Development Company, LP
* (c) Copyright 2010 Epimorphics Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/