This example inserts data about two books, and it displays the book titles in all uppercase characters and the length of each title string.
import com.hp.hpl.jena.query.*;
import com.hp.hpl.jena.rdf.model.Model;
import oracle.rdf.kv.client.jena.*;
import com.hp.hpl.jena.update.*;
public class Example13
{
public static void main(String[] args) throws Exception
{
String szStoreName = args[0];
String szHostName = args[1];
String szHostPort = args[2];
String szGraphName = args[3];
// Create Oracle NoSQL connection
OracleNoSqlConnection conn
= OracleNoSqlConnection.createInstance(szStoreName,
szHostName,
szHostPort);
// Create model from named graph
Model model =
OracleModelNoSql.createOracleModelNoSql(szGraphName, conn);
// Clear model
model.removeAll();
String insertString =
" PREFIX dc: <http://purl.org/dc/elements/1.1/> " +
" INSERT DATA " +
" { <http://example/book3> dc:title \"A new book\" ; " +
" dc:creator \"A.N.Other\" . " +
" <http://example/book4> dc:title \"Semantic Web Rocks\" ; " +
" dc:creator \"TB\" . " +
" } ";
System.out.println("Execute insert action " + insertString);
UpdateAction.parseExecute(insertString, model);
String szQuery
= "PREFIX dc: <http://purl.org/dc/elements/1.1/> " +
"PREFIX fn: <http://www.w3.org/2005/xpath-functions#> " +
" SELECT ?subject (fn:upper-case(?object) as ?object1) " +
" (fn:string-length(?object) as ?strlen) " +
" WHERE { ?subject dc:title ?object } ";
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 Example13.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 Example13 <store_name> \
<host_name> <host_port> <graph_name>
Execute query PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX fn: <http://www.w3.org/2005/xpath-functions#>
SELECT ?subject (fn:upper-case(?object) as ?object1)
(fn:string-length(?object) as ?strlen)
WHERE { ?subject dc:title ?object }
----------------------------------------------------------
| subject | object1 | strlen |
==========================================================
| <http://example/book4> | "SEMANTIC WEB ROCKS" | 18 |
| <http://example/book3> | "A NEW BOOK" | 10 |
----------------------------------------------------------