| Attributes | Values |
|---|
| has container
| |
| Date Created
| |
| maker
| |
| topic
| |
| described by
| |
| seeAlso
| |
| Date Modified
| |
| link
| |
| id
| - b6bd920306e6297e70bcd2da525dde63
- b6bd920306e6297e70bcd2da525dde63
|
| content
| - %VOSWARNING%
%META:TOPICPARENT{name="VirtJenaProvider"}%
---+ Virtuoso Jena Provider - SPARQL Example 12
<verbatim>
import com.hp.hpl.jena.query.*;
import com.hp.hpl.jena.graph.Triple;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.graph.Graph;
import com.hp.hpl.jena.rdf.model.*;
import com.hp.hpl.jena.rdf.model.RDFNode;
import com.hp.hpl.jena.vocabulary.DC;
import java.util.Iterator;
import virtuoso.jena.driver.*;
public class VirtuosoSPARQLExample12 {
/**
* Executes a SPARQL query against a virtuoso url and prints results.
*/
public static void main(String[] args)
{
String url;
if(args.length == 0)
url = "jdbc:virtuoso://localhost:1111";
else
url = args[0];
Model m = VirtModel.openDatabaseModel("my:test", url, "dba", "dba");
m.removeAll();
Resource r1 = m.createResource("http://example.org/book#1") ;
Resource r2 = m.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") ;
String prolog = "PREFIX dc: <"+DC.getURI()+"> \n" ;
// Query string.
String queryString = prolog + "SELECT ?title WHERE {?x dc:title ?title}" ;
System.out.println("Execute query=\n"+queryString) ;
System.out.println() ;
Query query = QueryFactory.create(queryString) ;
System.out.println("\n==CASE 1 ==Parse ARQ Execute ARQ GraphStore Virtuoso");
//NOTE: query is parsed & executed by ARQ, so it works slow
// and you can't use Virtuoso SPARQL features
QueryExecution qexec = QueryExecutionFactory.create(query, m) ;
// Or QueryExecutionFactory.create(queryString, model) ;
System.out.println("Titles: ") ;
try {
ResultSet rs = qexec.execSelect() ;
for ( ; rs.hasNext() ; ) {
QuerySolution rb = rs.nextSolution() ;
RDFNode x = rb.get("title") ;
if ( x.isLiteral() ) {
Literal titleStr = (Literal)x ;
System.out.println(" "+titleStr) ;
} else
System.out.println("Strange - not a literal: "+x) ;
}
} finally {
qexec.close() ;
}
System.out.println("\n==CASE 2a ==Parse ARQ Execute Virtuoso GraphStore Virtuoso");
//NOTE: query is parsed by ARQ, so you can't use Virtuoso SPARQL features
// execution speed fast
VirtuosoQueryEngine.register();
qexec = QueryExecutionFactory.create(query, m) ;
// Or QueryExecutionFactory.create(queryString, model) ;
System.out.println("Titles: ") ;
try {
ResultSet rs = qexec.execSelect() ;
for ( ; rs.hasNext() ; ) {
QuerySolution rb = rs.nextSolution() ;
RDFNode x = rb.get("title") ;
if ( x.isLiteral() ) {
Literal titleStr = (Literal)x ;
System.out.println(" "+titleStr) ;
} else
System.out.println("Strange - not a literal: "+x) ;
}
} finally {
qexec.close() ;
}
VirtuosoQueryEngine.unregister();
System.out.println("\n==CASE 2b ==Parse ARQ Execute Virtuoso GraphStore Virtuoso");
//NOTE: query is parsed by ARQ, so you can't use Virtuoso SPARQL features
// execution speed fast
qexec = VirtuosoQueryExecutionFactory.create(query, m) ;
System.out.println("Titles: ") ;
try {
ResultSet rs = qexec.execSelect() ;
for ( ; rs.hasNext() ; ) {
QuerySolution rb = rs.nextSolution() ;
RDFNode x = rb.get("title") ;
if ( x.isLiteral() ) {
Literal titleStr = (Literal)x ;
System.out.println(" "+titleStr) ;
} else
System.out.println("Strange - not a literal: "+x) ;
}
} finally {
qexec.close() ;
}
System.out.println("\n==CASE 3 ==Parse & Execute Virtuoso GraphStore Virtuoso");
//NOTE: query is parsed & executed by Virtuoso, so you can use all Virtuoso SPARQL features
// execution speed fast
qexec = VirtuosoQueryExecutionFactory.create(queryString, m) ;
System.out.println("Titles: ") ;
try {
ResultSet rs = qexec.execSelect() ;
for ( ; rs.hasNext() ; ) {
QuerySolution rb = rs.nextSolution() ;
RDFNode x = rb.get("title") ;
if ( x.isLiteral() ) {
Literal titleStr = (Literal)x ;
System.out.println(" "+titleStr) ;
} else
System.out.println("Strange - not a literal: "+x) ;
}
} finally {
qexec.close() ;
}
}
}
</verbatim>
- %VOSWARNING%
%META:TOPICPARENT{name="VirtJenaProvider"}%
---+ Virtuoso Jena Provider - SPARQL Example 12
<verbatim>
import com.hp.hpl.jena.query.*;
import com.hp.hpl.jena.graph.Triple;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.graph.Graph;
import com.hp.hpl.jena.rdf.model.*;
import com.hp.hpl.jena.rdf.model.RDFNode;
import com.hp.hpl.jena.vocabulary.DC;
import java.util.Iterator;
import virtuoso.jena.driver.*;
public class VirtuosoSPARQLExample12 {
/**
* Executes a SPARQL query against a virtuoso url and prints results.
*/
public static void main(String[] args)
{
String url;
if(args.length == 0)
url = "jdbc:virtuoso://localhost:1111";
else
url = args[0];
Model m = VirtModel.openDatabaseModel("my:test", url, "dba", "dba");
m.removeAll();
Resource r1 = m.createResource("http://example.org/book#1") ;
Resource r2 = m.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") ;
String prolog = "PREFIX dc: <"+DC.getURI()+"> \n" ;
// Query string.
String queryString = prolog + "SELECT ?title WHERE {?x dc:title ?title}" ;
System.out.println("Execute query=\n"+queryString) ;
System.out.println() ;
Query query = QueryFactory.create(queryString) ;
System.out.println("\n==CASE 1 ==Parse ARQ Execute ARQ GraphStore Virtuoso");
//NOTE: query is parsed & executed by ARQ, so it works slow
// and you can't use Virtuoso SPARQL features
QueryExecution qexec = QueryExecutionFactory.create(query, m) ;
// Or QueryExecutionFactory.create(queryString, model) ;
System.out.println("Titles: ") ;
try {
ResultSet rs = qexec.execSelect() ;
for ( ; rs.hasNext() ; ) {
QuerySolution rb = rs.nextSolution() ;
RDFNode x = rb.get("title") ;
if ( x.isLiteral() ) {
Literal titleStr = (Literal)x ;
System.out.println(" "+titleStr) ;
} else
System.out.println("Strange - not a literal: "+x) ;
}
} finally {
qexec.close() ;
}
System.out.println("\n==CASE 2a ==Parse ARQ Execute Virtuoso GraphStore Virtuoso");
//NOTE: query is parsed by ARQ, so you can't use Virtuoso SPARQL features
// execution speed fast
VirtuosoQueryEngine.register();
qexec = QueryExecutionFactory.create(query, m) ;
// Or QueryExecutionFactory.create(queryString, model) ;
System.out.println("Titles: ") ;
try {
ResultSet rs = qexec.execSelect() ;
for ( ; rs.hasNext() ; ) {
QuerySolution rb = rs.nextSolution() ;
RDFNode x = rb.get("title") ;
if ( x.isLiteral() ) {
Literal titleStr = (Literal)x ;
System.out.println(" "+titleStr) ;
} else
System.out.println("Strange - not a literal: "+x) ;
}
} finally {
qexec.close() ;
}
VirtuosoQueryEngine.unregister();
System.out.println("\n==CASE 2b ==Parse ARQ Execute Virtuoso GraphStore Virtuoso");
//NOTE: query is parsed by ARQ, so you can't use Virtuoso SPARQL features
// execution speed fast
qexec = VirtuosoQueryExecutionFactory.create(query, m) ;
System.out.println("Titles: ") ;
try {
ResultSet rs = qexec.execSelect() ;
for ( ; rs.hasNext() ; ) {
QuerySolution rb = rs.nextSolution() ;
RDFNode x = rb.get("title") ;
if ( x.isLiteral() ) {
Literal titleStr = (Literal)x ;
System.out.println(" "+titleStr) ;
} else
System.out.println("Strange - not a literal: "+x) ;
}
} finally {
qexec.close() ;
}
System.out.println("\n==CASE 3 ==Parse & Execute Virtuoso GraphStore Virtuoso");
//NOTE: query is parsed & executed by Virtuoso, so you can use all Virtuoso SPARQL features
// execution speed fast
qexec = VirtuosoQueryExecutionFactory.create(queryString, m) ;
System.out.println("Titles: ") ;
try {
ResultSet rs = qexec.execSelect() ;
for ( ; rs.hasNext() ; ) {
QuerySolution rb = rs.nextSolution() ;
RDFNode x = rb.get("title") ;
if ( x.isLiteral() ) {
Literal titleStr = (Literal)x ;
System.out.println(" "+titleStr) ;
} else
System.out.println("Strange - not a literal: "+x) ;
}
} finally {
qexec.close() ;
}
}
}
</verbatim>
|
| Title
| - VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
|
| has creator
| |
| is described using
| |
| atom:source
| |
| atom:updated
| - 2014-04-29T00:54:24Z
- 2014-04-29T00:54:24Z
|
| atom:title
| - VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
|
| atom:author
| |
| label
| - VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
- VirtJenaSPARQLExample12
|
| topic
| - Virtuoso Open-Source, OpenLink Data Spaces, and OpenLink Ajax Toolkit
- Virtuoso Open-Source, OpenLink Data Spaces, and OpenLink Ajax Toolkit
- Virtuoso Open-Source, OpenLink Data Spaces, and OpenLink Ajax Toolkit
- Virtuoso Open-Source, OpenLink Data Spaces, and OpenLink Ajax Toolkit
- Virtuoso Open-Source, OpenLink Data Spaces, and OpenLink Ajax Toolkit
|
![[RDF Data]](/fct/images/sw-rdf-blue.png)
![[cxml]](/fct/images/cxml_doc.png)
![[csv]](/fct/images/csv_doc.png)
![[text]](/fct/images/ntriples_doc.png)
![[turtle]](/fct/images/n3turtle_doc.png)
![[ld+json]](/fct/images/jsonld_doc.png)
![[rdf+json]](/fct/images/json_doc.png)
![[rdf+xml]](/fct/images/xml_doc.png)
![[atom+xml]](/fct/images/atom_doc.png)
![[html]](/fct/images/html_doc.png)