How to use findRoleByKey method of org.cerberus.crud.dao.IUserRoleDAO class

Best Cerberus-source code snippet using org.cerberus.crud.dao.IUserRoleDAO.findRoleByKey

Source:UserRoleService.java

...46    private IUserRoleDAO userRoleDAO;47    private final String OBJECT_NAME = "UserRole";48    @Override49    public void updateUserRoles(User user, List<UserRole> newRoles) throws CerberusException {50        List<UserRole> oldRoles = this.findRoleByKey(user.getLogin());51        //delete if don't exist in new52        for (UserRole old : oldRoles) {53            if (!newRoles.contains(old)) {54                this.removeRoleFromUser(old, user);55            }56        }57        //insert if don't exist in old58        for (UserRole role : newRoles) {59            if (!oldRoles.contains(role)) {60                this.addRoleToUser(role, user);61            }62        }63    }64    private void addRoleToUser(UserRole role, User user) throws CerberusException {65        if (!userRoleDAO.addRoleToUser(role, user)) {66            //TODO define message => error occur trying to add role user67            throw new CerberusException(new MessageGeneral(MessageGeneralEnum.NO_DATA_FOUND));68        }69    }70    private void removeRoleFromUser(UserRole role, User user) throws CerberusException {71        if (!userRoleDAO.removeRoleFromUser(role, user)) {72            //TODO define message => error occur trying to delete role user73            throw new CerberusException(new MessageGeneral(MessageGeneralEnum.NO_DATA_FOUND));74        }75    }76    @Override77    public List<UserRole> findRoleByKey(String login) throws CerberusException {78        List<UserRole> list = userRoleDAO.findRoleByKey(login);79        if (list == null) {80            //TODO define message => error occur trying to find role user81            throw new CerberusException(new MessageGeneral(MessageGeneralEnum.NO_DATA_FOUND));82        }83        return list;84    }85    @Override86    public AnswerList<UserRole> readByUser(String login) {87        return userRoleDAO.readByUser(login);88    }89    @Override90    public Answer updateRolesByUser(User user, List<UserRole> newRoles) {91        Answer a = new Answer(new MessageEvent(MessageEventEnum.DATA_OPERATION_OK).resolveDescription("ITEM", OBJECT_NAME)92                .resolveDescription("OPERATION", "UPDATE"));...

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