if (userView.hasRoleType(RoleType.RESEARCHER)
if (userView != null && userView.hasRoleType(RoleType.RESEARCHER)
		public boolean evaluate(ResultUnitAssociation association) {			final ResearchResult result = association.getResult();			final IUserView userView = AccessControl.getUserView();			if (userView.hasRoleType(RoleType.RESEARCHER)					&& result.hasPersonParticipation(userView.getPerson())) {				return true;			}			return false;		}