@Override public KeyIndex userIndex() { requireValid(); return data.getUserIndex(); }
@Override @Nonnull public List<Collection<RatingMatrixEntry>> get() { int nusers = data.getUserIndex().size(); ArrayList<IntArrayList> userLists = new ArrayList<>(nusers); for (int i = 0; i < nusers; i++) { userLists.add(new IntArrayList()); } for (RatingMatrixEntry pref : getRatings()) { final int uidx = pref.getUserIndex(); final int idx = pref.getIndex(); userLists.get(uidx).add(idx); } ArrayList<Collection<RatingMatrixEntry>> users = new ArrayList<>(nusers); for (IntArrayList list: userLists) { list.trim(); users.add(new PackedRatingCollection(data, list)); } return users; } }
assertThat(ip, samePreferenceAs(prefs[i])); assertThat(ip.getUserIndex(), equalTo(data.getUserIndex().getIndex(prefs[i].getUserId()))); assertThat(ip.getItemIndex(), equalTo(data.getItemIndex().getIndex(prefs[i].getItemId())));
@Override public KeyIndex userIndex() { requireValid(); return data.getUserIndex(); }
@Override @Nonnull public List<Collection<RatingMatrixEntry>> get() { int nusers = data.getUserIndex().size(); ArrayList<IntArrayList> userLists = new ArrayList<>(nusers); for (int i = 0; i < nusers; i++) { userLists.add(new IntArrayList()); } for (RatingMatrixEntry pref : getRatings()) { final int uidx = pref.getUserIndex(); final int idx = pref.getIndex(); userLists.get(uidx).add(idx); } ArrayList<Collection<RatingMatrixEntry>> users = new ArrayList<>(nusers); for (IntArrayList list: userLists) { list.trim(); users.add(new PackedRatingCollection(data, list)); } return users; } }