Instructions
Requirements and Specifications
Source Code
CAMPUS
import java.util.HashMap;
public class Campus {
private String campusName;
private HashMap locations;
private Location startingLocation;
private String filename;
public Campus() {
this.campusName = null;
this.locations = new HashMap<>();
this.startingLocation = null;
this.filename = null;
}
public Campus(String campusName, Location startingLocation) {
this.campusName = campusName;
this.locations = new HashMap<>();
this.startingLocation = startingLocation;
this.filename = null;
}
public void addLocation(Location location) {
locations.put(location.getName(), location);
}
public Location getLocation(String name) {
return locations.get(name);
}
public void removeLocation(String name) {
locations.remove(name);
}
public String getCampusName() {
return campusName;
}
public void setCampusName(String campusName) {
this.campusName = campusName;
}
public Location getStartingLocation() {
return startingLocation;
}
public void setStartingLocation(Location startingLocation) {
this.startingLocation = startingLocation;
}
public String getFilename() {
return filename;
}
public void setFilename(String filename) {
this.filename = filename;
}
}
DOOR
public class Door {
private String direction;
private Location leavingLocation;
private Location enteringLocation;
public Door() {
this.direction = null;
this.leavingLocation = null;
this.enteringLocation = null;
}
public Door(String direction, Location leavingLocation, Location enteringLocation) {
this.direction = direction;
this.leavingLocation = leavingLocation;
this.enteringLocation = enteringLocation;
}
public String describe() {
return "You can go " + direction.toUpperCase() + " to get to " + enteringLocation.getName();
}
public Location getLeaving() {
return leavingLocation;
}
public void setLeaving(Location leaving) {
leavingLocation = leaving;
}
public Location getEntering() {
return enteringLocation;
}
public void setEntering(Location entering) {
enteringLocation = entering;
}
public String getDirection() {
return direction;
}
public void setDirection(String direction) {
this.direction = direction;
}
}
LOCATION
import java.util.ArrayList;
public class Location {
private String name;
private String description;
private Boolean haveVisited;
private ArrayList doors;
public Location() {
this.name = null;
this.description = null;
this.haveVisited = false;
this.doors = new ArrayList<>();
}
public Location(String name, String description) {
this.name = name;
this.description = description;
this.haveVisited = false;
this.doors = new ArrayList<>();
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public ArrayList getDoors() {
return doors;
}
public Location leaveLocation(String dir) {
return doors.stream().filter(d -> d.getDirection().equals(dir)).map(Door::getEntering).findAny().orElse(null);
}
public void addDoor(Door door) {
doors.add(door);
}
public boolean visit() {
boolean result = haveVisited;
haveVisited = true;
return result;
}
}
TOUR STATUS
public class TourStatus {
private Campus campus;
private Location currentLocation;
public TourStatus() {
this.campus = null;
this.currentLocation = null;
}
public Campus getCampus() {
return campus;
}
public void setCampus(Campus campus) {
this.campus = campus;
}
public Location getCurrentLocation() {
return currentLocation;
}
public void setCurrentLocation(Location currentLocation) {
this.currentLocation = currentLocation;
}
public void updateTourLocation(String dir) {
if (currentLocation != null) {
Location result = currentLocation.leaveLocation(dir);
if (result != null) {
currentLocation = currentLocation.leaveLocation(dir);
if (!currentLocation.visit()) {
System.out.println("Welcome to " + currentLocation.getName());
System.out.println(currentLocation.getDescription());
}
}
else {
System.out.println("Invalid direction");
}
}
}
}
TOUR UMW
import java.io.File;
import java.io.IOException;
import java.util.Scanner;
public class TourUMW {
private static final String SEP1 = "*****";
private static final String SEP2 = "+++";
private static final String INPUT_FILENAME = "input.txt";
private static Campus campus;
private static TourStatus status;
public static void main(String[] args) {
Campus campus = null;
try (Scanner scanner = new Scanner(new File(INPUT_FILENAME))) {
campus = setUpCampus(scanner);
}
catch (IOException e) {
throw new RuntimeException(e);
}
System.out.println("You are visiting " + campus.getCampusName());
System.out.println();
TourStatus status = new TourStatus();
status.setCampus(campus);
status.setCurrentLocation(campus.getStartingLocation());
status.getCurrentLocation().visit();
System.out.println("Welcome to " + campus.getStartingLocation().getName());
System.out.println(campus.getStartingLocation().getDescription());
System.out.println();
Scanner scanner = new Scanner(System.in);
boolean isOver = false;
while (!isOver) {
System.out.println("You are at " + status.getCurrentLocation().getName() + " now");
for (Door d : status.getCurrentLocation().getDoors()) {
System.out.println(d.describe());
}
System.out.println("Print 'Q' to quit");
System.out.print("Your choice: ");
String choice = promptUser(scanner);
if ("q".equals(choice)) {
isOver = true;
} else {
status.updateTourLocation(choice);
}
System.out.println();
}
System.out.println("Thank you for visiting " + campus.getCampusName());
scanner.close();
}
public static Campus setUpCampus(Scanner input) {
Campus campus = new Campus();
String line;
String campusName = input.nextLine().trim();
line = input.nextLine().trim();
assert SEP1.equals(line);
campus.setCampusName(campusName);
Location startingLocation = null;
line = input.nextLine().trim();
assert "Locations:".equals(line);
while(true) {
String name = input.nextLine().trim();
if (SEP1.equals(name)) {
break;
}
String description = input.nextLine().trim();
Location location = new Location(name, description);
if (startingLocation == null) {
startingLocation = location;
}
campus.addLocation(location);
line = input.nextLine().trim();
assert SEP2.equals(line);
}
campus.setStartingLocation(startingLocation);
assert "Doors:".equals(input.nextLine().trim());
while(true) {
String loc1 = input.nextLine().trim();
if (SEP1.equals(loc1)) {
break;
}
String dir = input.nextLine().trim();
String loc2 = input.nextLine().trim();
Location l1 = campus.getLocation(loc1);
Location l2 = campus.getLocation(loc2);
l1.addDoor(new Door(dir, l1, l2));
line = input.nextLine().trim();
assert SEP2.equals(line);
}
return campus;
}
public static String promptUser(Scanner input) {
return input.nextLine().trim().toLowerCase();
}
}