private ArrayList<Role> getAllRoles(String Declaration) {
		// TODO Auto-generated method stub
		ArrayList<Role> arrayrole = new ArrayList();
		StringTokenizer st = new StringTokenizer(Declaration, ",");
		while(st.hasMoreElements()){
			String token = st.nextToken();
			StringTokenizer sttemp = new StringTokenizer(token, " ");
			String id = sttemp.nextToken();
			id = sttemp.nextToken();
			String multiplicity = sttemp.nextToken();
			Role role = new Role(id, multiplicity);
			arrayrole.add(role);
		}
		return arrayrole;
	}