/** Overriden method from SQLMultiSource */
public Rating next() {
if (!hasNext()) return null;
Rating l = new Rating(instances);
Attribute[] attributes = getAttributes();
SparseInstance d = new SparseInstance(attributes.length - 2);
Long start;
try {
l.setUserId(Utils.objectToInteger(records.getObject(1)));
l.setObjectId(Utils.objectToInteger(records.getObject(2)));
int flixId = Integer.parseInt(records.getObject(2).toString());
int i = 0;
for (; i < this.attributes.length; i++) {
start = System.currentTimeMillis();
if (attributes[i].isNominal()) d.setValue(i, records.getObject(i + 3).toString());
else d.setValue(i, Utils.objectToDouble(records.getObject(i + 3)));
Oracle += System.currentTimeMillis() - start;
}
SparseInstance movie = imdb.getMovie(flixId);
d = (SparseInstance) d.mergeInstance(movie);
d.setDataset(instances);
start = System.currentTimeMillis();
records.next();
Oracle += System.currentTimeMillis() - start;
} catch (SQLException e) {
e.printStackTrace();
return null;
}
l.setRecord(d);
return l;
}
public Integer getUserId() {
if (!usersList.isEmpty()) {
int index;
if (userID == null) {
index = 0;
} else {
index = usersList.indexOf(userID.toString()) + 1;
}
if (index >= usersList.size()) {
userID = null;
return null;
}
userID = Utils.objectToInteger(usersList.get(index));
return userID;
}
try {
if (users.next() == false) return null;
int userId = users.getInt(1);
return userId;
} catch (Exception e) {
e.printStackTrace();
try {
usersStatement.close();
// We are at the end of users cursor, so we close it.
users.close();
} catch (SQLException e1) {
e1.printStackTrace();
}
return 0;
}
}