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/** Jobber med å få inn farger her

 * A doctor has the capacity to treat one patient at a time.

 */

public class Doctor {

       // Internal variables go here:

       /**

        * @return the patient this doctor is treating, or null if s/he isn't currently treating any patient.

        */

       public Patient getPatient() { // 1a

             ...

       }

       /**

        * @return true if this doctor is currently treating a patient, otherwise false.

        */

       public boolean isAvailable() { // 1a

             ...

       }

       /**

        * Sets the patient that this doctor is treating, use null to indicate s/he isn't currently treating any patient.

        * @param patient

        */

       public void setPatient(final Patient patient) { // 1a

             ...

       }

}

/**

 * A class for managing a set of doctors and the patients they're treating.

 * When doctors or patients arrive, it is made sure that patients are treated as soon as possible.

 */

public class TreatmentUnit {

       // Internal variables go here: // 1b

       /**

        * Adds a doctor and makes sure s/he starts treating a patient, if one is waiting.

        * @param doctor

        */

       public void addDoctor(final Doctor doctor) {  // 1b

             ...

       }

       /**

        * @return the currently available doctors

        */

       public Collection<Doctor> getAvailableDoctors() {  // 1b

             ...

       }

       /**

        * Adds a patient to this treatment unit, and makes sure treatment starts if any doctor is available.

        * Otherwise the patient is queued for treatment when a doctor becomes available.

        * @param patient

        */

       public void addPatient(final Patient patient) {  // 1b

             ...

       }

       /**

        * @param pred the predicate that the doctor must satisfy

        * @return some doctor satisfying the predicate

        */

       public Doctor getDoctor(final Predicate<Doctor> pred) {  // 1b

             ...

       }

       /**

        * Find the doctor, if any, that treats the provided patient.

        * @param patient

        * @return the doctor treating the provided patient, or null, of the patient isn't currently being treated

        */

       public Doctor getDoctor(final Patient patient) {  // 1b

             ...

       }

       /**

        * Find all patients that are not currently being treated

        * @return the patients not currently being treated

        */

       public Collection<Patient> getWaitingPatients() {  // 1b

             final Collection<Patient> result = new ArrayList<>();

             ...

       }

       /**

        * Finds a waiting patient and sets him/her as the provided doctor's patient.

        * @param doctor the doctor for which a patient to treat should be found.

        * @return true if a patient for the provided doctor was found, false otherwise.

        */

       private boolean startTreatment(final Doctor doctor) {   // 1c

             ...

       }

       /**

        * Finds an available doctor for the provided patient, and sets that doctor to treat the patient.

        * @param patient the patient for which a treating doctor should be found.

        * @return true if a doctor for the provided patient was found, false otherwise.

        */

       private boolean startTreatment(final Patient patient) {   // 1c

             ...

       }

       /**

        * Removes the link between doctor and patient, after treatment is finished.

        * Since the patient is fully treated, s/he is removed from this treatment unit.

        * Also ensure the doctor starts treating another patient.

        * @param doctor the doctor that has finished treating his/her patient.

        */

       public void treatmentFinished(final Doctor doctor) {  // 1c

             ...

}

/**

 * A class describing patients. For now it is empty

 */

public class Patient {

       // empty, in part 1 the patient is dead. As in no methods, no nothing.

}