import java.io.*;

import com.hp.hpl.jena.rdf.model.*;

import com.hp.hpl.jena.query.*;

import com.hp.hpl.jena.sparql.*;

import com.hp.hpl.jena.update.*;

import java.io.File;

import java.io.BufferedReader;

import java.io.IOException;

public class RDFReasoner extends Object {

public static void main (String args[]) {

String current = null;

if (args.length == 0) {

System.out.println("<rdf_filename> <query_filename>");

System.exit(1);

}

else

if (args.length == 1) {

//System.out.println(current + "\n");

String inputFile = null;

Model model = ModelFactory.createDefaultModel();

try {

inputFile = args[0];

InputStream in = new FileInputStream(inputFile);

if (in == null) {

System.out.println("File not found!");

System.exit(1);

}

else {

current = new File(args[0]).getAbsolutePath();

current = "file://" + current;

}

model.read(current);

model.write(System.out);

} catch(Exception e) {

System.out.println(e.getMessage());

System.exit(1);

}

}

else {

//System.out.println(current + "\n");

String inputQuery = null;

String inputFile = null;

String queryString = "";

Model model = ModelFactory.createDefaultModel();

try {

inputFile = args[0];

inputQuery = args[1];

BufferedReader query_in = new BufferedReader(new FileReader(inputQuery));

String line;

while ((line = query_in.readLine())!=null)

queryString += line + "\n";

InputStream in = new FileInputStream(inputFile);

if (in == null) {

System.out.println("File not found!");

System.exit(1);

}

else {

current = new File(args[0]).getAbsolutePath();

current = "file://" + current;

}

//System.out.println("\nQuery: " + queryString + "\n");

model.read(current);

Query query = QueryFactory.create(queryString);

//Execute query and obtain results

QueryExecution qe = QueryExecutionFactory.create(query, model);

ResultSet results = qe.execSelect();

// Output query results

ResultSetFormatter.out(System.out, results, query);

// Important - free up resources used running the query

qe.close();

//model.write(System.out);

} catch(Exception e) {

System.out.println(e.getMessage());

System.exit(1);

}

}

}

}