import com.cis399.assignment1.model.Distance; import com.cis399.assignment1.mode

Question

import com.cis399.assignment1.model.Distance;

import com.cis399.assignment1.model.Event;

import com.cis399.assignment1.model.Participant;

import com.cis399.assignment1.model.implementation.CyclingParticipant;

import com.cis399.assignment1.model.implementation.RunningParticipant;

import com.cis399.assignment1.model.implementation.SwimmingParticipant;

public class Driver {

public static void main(String[] args) {

/*

* A Map will be used to hold the rosters for the three events in the Triathlon. The equivalent class

* in the Foundation API that you can use in Objective-C is the NSMutableDictionary. Note that in order

* to modify the Dictionary after construction we must use an NSMutableDictionary instance, because the

* NSDictionary class is immutable (similar to String in Java).

*/

Map<Event, List<Participant>> mainRoster = new HashMap<Event, List<Participant>>();

mainRoster.put(Event.SWIMMING, new ArrayList<Participant>());

mainRoster.put(Event.CYCLING, new ArrayList<Participant>());

mainRoster.put(Event.RUNNING, new ArrayList<Participant>());

/*

* Interface are first class types in Java, so they can be used on their own to specify a type (and

* consequently they share a namespace with Classes). The Objective-C equivalent, the Protocol, is not

* a first class type, and has to be specified in addition to a valid class type; to say that a type is

* can be any class of a particular protocol we must use the keyword id for the class type, which is

* essentially a wildcard class type in Objective-C. The syntax would look something like this:

* id <SomeProtocolName> variableName;

*/

addParticipantToRoster(mainRoster, new CyclingParticipant("Charles"));

addParticipantToRoster(mainRoster, new SwimmingParticipant("Jason"));

addParticipantToRoster(mainRoster, new RunningParticipant("Kurt"));

Distance distanceToRace = Distance.HALF_IRONMAN;

for(Event event : Event.values()) {

for(Participant participant : mainRoster.get(event)) {

if(!participant.isDisqualified()) {

try {

System.out.println(participant.getName() + " is about to begin the " + event + " event.");

int finishTime = participant.performEvent(event, distanceToRace);

participant.addTime(finishTime);

System.out.println(participant.getName() + ", who prefers " + participant.getPreferredEvent() + ", finished the " + event + " event in " + finishTime + " minutes; Bringing the total race time to " + participant.getTime() + " minutes.");

} catch (CouldNotFinishException e) {

participant.setCouldNotFinish();

System.out.println(participant.getName() + ", who prefers " + participant.getPreferredEvent() + ", could not finish the " + event + " and was disqualified.");

}

}

}

}

Participant winner = null;

for(Participant participant : mainRoster.get(Event.RUNNING)) {

try {

if(!participant.isDisqualified() && (winner == null || winner.getTime() > participant.getTime())) {

winner = participant;

}

} catch (CouldNotFinishException e) {

// Intentionally Left Blank

}

}

if(winner != null) {

try {

System.out.println(" " + winner.getName() + ", who prefers " + winner.getPreferredEvent() + ", wins first place with a total time of " + winner.getTime() + " minutes!");

} catch (CouldNotFinishException e) {

winner = null;

}

}

if(winner == null) {

System.out.println(" No one finished the race!");

}

}

private static void addParticipantToRoster(Map<Event, List<Participant>> mainRoster, Participant participant) {

mainRoster.get(Event.SWIMMING).add(participant);

mainRoster.get(Event.CYCLING).add(participant);

mainRoster.get(Event.RUNNING).add(participant);

}

}

Explanation / Answer

//header file called 'Driver.h'

//assumes the other imports in the java file to be available as Obj-C header files as listed below

#import "Distance.h"

#import "Event.h"

#import "Participant.h"

#import "CyclingParticipant.h"

#import "RunningParticipant.h"

#import "SwimmingParticipant.h"

@interface Driver : NSObject {

}

+ (void) main:(NSArray *)args;

@end

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