This example uses analyze method in the OracleGraphNoSql class to generate data sampling from a graph. In this example, data sampling is generated in a proportion sampPercentage: sampFactor with respect to all triples stored in the default graph.

import org.openjena.riot.Lang;
import oracle.rdf.kv.client.jena.*;

public class Example16
{
  
  public static void main(String[] args) throws Exception
  {
    
String szStoreName  = args[0];
String szHostName   = args[1];
String szHostPort   = args[2];
double iSampRate = Double.parseDouble(args[3]); 
    
// Create Oracle NoSQL connection
OracleNoSqlConnection conn 
          = OracleNoSqlConnection.createInstance(szStoreName,
                                                 szHostName, 
                                                 szHostPort);
    
    
// Create a DatasetGraphNoSql object to manage the dataset in the
// Oracle NoSQL Database
OracleGraphNoSql graph = new OracleGraphNoSql(conn);
DatasetGraphNoSql datasetGraph = DatasetGraphNoSql.createFrom(graph);
   
// Clear dataset and close it as it is needed just to clear the 
// dataset
datasetGraph.clearRepository();
datasetGraph.close();
    
// Load data from file into the Oracle NoSQL Database
DatasetGraphNoSql.load("family.rdf", Lang.RDFXML, conn, 
"http://example.com");     
    
// Analyze the default graph and gnerate sampling data
long sizeSamp = graph.analyze(iSampRate);
    
System.out.println("sampling size is " + sizeSamp);
    
graph.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 Example16.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 Example15 <store_name> \
<host_name> <host_port> 0.005

sampling size is 5