public boolean addPrivilege(Privilege aPrivilege) {
boolean wasAdded = false;
if (privileges.contains(aPrivilege)) {
return false;
}
if (privileges.contains(aPrivilege)) {
return false;
}
if (privileges.contains(aPrivilege)) {
return false;
}
Employee existingEmployee = aPrivilege.getEmployee();
boolean isNewEmployee = existingEmployee != null && !this.equals(existingEmployee);
if (isNewEmployee && existingEmployee.numberOfPrivileges() <= minimumNumberOfPrivileges()) {
return wasAdded;
}
if (isNewEmployee) {
aPrivilege.setEmployee(this);
} else {
privileges.add(aPrivilege);
}
wasAdded = true;
return wasAdded;
}
public boolean removePrivilege(Privilege aPrivilege) {
boolean wasRemoved = false;
// Unable to remove aPrivilege, as it must always have a employee
if (this.equals(aPrivilege.getEmployee())) {
return wasRemoved;
}
// employee already at minimum (1)
if (numberOfPrivileges() <= minimumNumberOfPrivileges()) {
return wasRemoved;
}
privileges.remove(aPrivilege);
wasRemoved = true;
return wasRemoved;
}
