public void AverageRatingByProductName(String prodName) {
SessionFactory sf = HibernateUtility.getSessionfactory();
Session session = sf.openSession();
session.beginTransaction();
String sql1 = "SELECT * FROM product where productName = :productName";
SQLQuery query1 = session.createSQLQuery(sql1);
query1.setParameter("productName", prodName);
query1.addEntity(Product.class);
Product product = (Product) query1.uniqueResult();
String sql2 = "SELECT * FROM ratingdetails where productId = :productId";
SQLQuery query2 = session.createSQLQuery(sql2);
query2.setParameter("productId", product.getProductId());
query2.addEntity(RatingDetails.class);
List ratings = query2.list();
session.getTransaction().commit();
float count = ratings.size();
int sum = 0;
for (Object r : ratings) {
RatingDetails rate = (RatingDetails) r;
sum = sum + rate.getRating();
}
float averageRating = (sum / count);
System.out.println("pid " + product + " avg " + averageRating);
}
public void calulateAverageRating() {
SessionFactory sf = HibernateUtility.getSessionfactory();
Session session = sf.openSession();
session.beginTransaction();
String sql = "SELECT * FROM product";
SQLQuery query = session.createSQLQuery(sql);
query.addEntity(Product.class);
List listProductIds = query.list();
for (Object pro : listProductIds) {
Product p = (Product) pro;
String sql1 = "SELECT * FROM ratingdetails where productId = :productId";
SQLQuery query1 = session.createSQLQuery(sql1);
query1.setParameter("productId", p.getProductId());
query1.addEntity(RatingDetails.class);
List ratings = query1.list();
session.getTransaction().commit();
float count = ratings.size();
int sum = 0;
for (Object r : ratings) {
RatingDetails rate = (RatingDetails) r;
sum = sum + rate.getRating();
}
float averageRating = (sum / count);
avgProdList.put(p, averageRating);
System.out.println("pid " + p.getProductId() + " avg " + averageRating);
}
System.out.println(avgProdList);
System.out.println();
sortAverageRating();
/*for (Iterator iterator = listProductIds.iterator(); iterator.hasNext();) {
RatingDetails ratingobj = (RatingDetails) iterator.next();
System.out.print("First Name: " + employee.getFirstName());
System.out.print(" Last Name: " + employee.getLastName());
System.out.println(" Salary: " + employee.getSalary());
}*/
}
