TDBでSPARQL ― 2010-03-05 23:31:08

もちろんSPARQL使うこともできる．

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.rdf.model.Literal;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.tdb.TDBFactory;

public class TDBEx003 {
public static void main(String[] args) {
		String assemblerFile = "Store/tdb-assembler.ttl";
		Model model = TDBFactory.assembleModel(assemblerFile);
		
		String strQuery = "" +
				"PREFIX rdf:  " +
				"PREFIX dc:  " +
				"SELECT ?rc ?title " +
				"WHERE {" +
				"?rc dc:title ?title ." +
				"}";
		Query query = QueryFactory.create(strQuery);
		QueryExecution qexec = QueryExecutionFactory.create(query,model);
		
		ResultSet result = qexec.execSelect();
		
		while(result.hasNext()) {
			QuerySolution qsol = result.next();
			Resource rc = (Resource) qsol.get("rc");
			Literal title = (Literal) qsol.get("title");
			System.out.println(rc);
			System.out.println(title);
		}

		model.close();

	}
}

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