This example "converts" two Fahrenheit temperatures (18.1 and 32.0) to Celsius temperatures.
import com.hp.hpl.jena.update.*;
import com.hp.hpl.jena.query.*;
import com.hp.hpl.jena.rdf.model.Model;
import oracle.rdf.kv.client.jena.*;
public class Example11
{
public static void main(String[] args) throws Exception
{
String szStoreName = args[0];
String szHostName = args[1];
String szHostPort = args[2];
String szModelName = args[3];
// Create Oracle NoSQL connection
OracleNoSqlConnection conn
= OracleNoSqlConnection.createInstance(szStoreName,
szHostName,
szHostPort);
// Create model from named graph
Model model =
OracleModelNoSql.createOracleModelNoSql(szModelName, conn);
// Clear model
model.removeAll();
String insertString =
" PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> " +
" INSERT DATA " +
" { " +
" <u:Object1> <u:temp> \"18.1\"^^xsd:float ; " +
" <u:name> \"Foo... \" . " +
" <u:Object2> <u:temp> \"32.0\"^^xsd:float ; " +
" <u:name> \"Bar... \" . " +
" } ";
System.out.println("Execute insert action " + insertString);
UpdateAction.parseExecute(insertString, model);
String szQuery =
" PREFIX fn: <http://www.w3.org/2005/xpath-functions#> " +
" SELECT ?subject ?temp ((?temp - 32.0)*5/9 as ?celsius_temp) " +
" WHERE { ?subject <u:temp> ?temp } ";
System.out.println("Execute query " + szQuery);
Query query = QueryFactory.create(szQuery, Syntax.syntaxARQ);
QueryExecution qexec = QueryExecutionFactory.create(query, model);
try {
ResultSet results = qexec.execSelect();
ResultSetFormatter.out(System.out, results, query);
}
finally {
qexec.close();
}
model.close();
conn.dispose();
}
}
The following are the commands to compile and run this example, as well as the expected output of the java command.
javac -classpath ./:./jena-core-2.7.4.jar:./jena-arq-2.9.4.jar: \
./sdordfnosqlclient.jar:./kvclient.jar:./xercesImpl-2.10.0.jar: \
./slf4j-api-1.6.4.jar:./slf4j-log4j12-1.6.4.jar:./log4j/1.2.16.jar: \
./jena-iri-0.9.4.jar:./xml-apis-1.4.01.jar Example11.java
javac -classpath ./:./jena-core-2.7.4.jar:./jena-arq-2.9.4.jar: \
./sdordfnosqlclient.jar:./kvclient.jar:./xercesImpl-2.10.0.jar: \
./slf4j-api-1.6.4.jar:./slf4j-log4j12-1.6.4.jar:./log4j/1.2.16.jar: \
./jena-iri-0.9.4.jar:./xml-apis-1.4.01.jar Example11 <store_name> \
<host_name> <host_port> <graph_name>
Execute insert action PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
INSERT DATA {
<u:Object1> <u:temp> "18.1"^^xsd:float ; <u:name> "Foo... " .
<u:Object2> <u:temp> "32.0"^^xsd:float ; <u:name> "Bar... " . }
Execute query PREFIX fn: <http://www.w3.org/2005/xpath-functions#>
SELECT ?subject ?temp ((?temp - 32.0)*5/9 as ?celsius_temp)
WHERE { ?subject <u:temp> ?temp }
----------------------------------------------------
| subject | temp | celsius_temp |
====================================================
| <u:Object1> | 18.1 | -7.722222222222222222222223 |
| <u:Object2> | 32 | 0. |
----------------------------------------------------