/**
* Merges to user lists. New users will be added and old users will be updated.
*
* @param aOriginal Original {@link List} of {@link User}.
* @param aChanges New {@link List} of {@link User} to merge into original list.
* @return Merges {@link List} of {@link User}.
*/
public static List<User> merge(List<User> aOriginal, List<User> aChanges) {
List<User> vUsers = new ArrayList<User>();
// delete original users not in changes, not manually added and without letters
for (Iterator<User> vIterator = aOriginal.iterator(); vIterator.hasNext(); ) {
User vUser = vIterator.next();
List<User> vUsersSelected =
UserListUtils.selectUnique(aChanges, vUser.getName(), vUser.getBirthdate());
if (vUsersSelected.size() == 0 && !vUser.isManualAdded()) {
User vUserDeleted = new User(vUser);
vUsers.add(vUserDeleted.setName(null));
vIterator.remove();
}
}
// update and add user data
List<User> vUnassignedUsers = new ArrayList<User>(); // list of users with more unique
// users in original list
for (Iterator<User> vIterator = aChanges.iterator(); vIterator.hasNext(); ) {
User vUser = vIterator.next();
List<User> vUsersSelected =
UserListUtils.selectUnique(aOriginal, vUser.getName(), vUser.getBirthdate());
if (vUsersSelected.size() == 1) {
// one unique user found > update user
User vUserSelected = new User(vUsersSelected.get(0)).update(vUser);
vUsers.add(vUserSelected);
vIterator.remove();
} else if (vUsersSelected.size() == 0) {
// no user found > check if to find without birthdate
List<User> vUsersByName = UserListUtils.selectUnique(aOriginal, vUser.getName(), "");
if (vUsersByName.size() == 1) {
// found user > update
User vUserSelected = new User(vUsersByName.get(0)).update(vUser);
vUsers.add(vUserSelected);
} else {
// not found by name > add user
User vNewUser = new User(vUser);
vUsers.add(vNewUser);
vIterator.remove();
}
} else if (vUnassignedUsers.size() > 1) {
// more than one unique user found > add to list for further processing
vUnassignedUsers.add(vUser);
vIterator.remove();
}
}
// process unassigned users
// TODO
logger.warn("Unassigned users " + vUnassignedUsers.size());
return vUsers;
}
