trustAlg.setGraph2Output(trustGraph);
trustAlg.setGraph2Listen(repGraph);
//add rank based trust alg as an observer to the reputation graph
repGraph.addObserver(trustAlg);
//parse the feedbacks from the arff file
DefaultArffFeedbackGenerator feedbackGen = new DefaultArffFeedbackGenerator();
ArrayList<Feedback> feedbacks = (ArrayList<Feedback>) feedbackGen.generateHardcoded("feedbacks.arff");