Designing and implementing java applications.

Understand how to apply OOP principles for designing and implementing Java applications.

Create UML class diagram for application in package oop.banca.

Create UML class diagram for application in package oop.senzor.

Train traffic simulator java application is presented in the listing bellow. Implement and run the program and then resolve the requirements at the end of the program.

import java.util.*;
 
public class Simulator {
 
	/**
	 * @param args
	 */
	public static void main(String[] args) {
 
		//build station Cluj-Napoca
		Controler c1 = new Controler("Cluj-Napoca");
 
		Segment s1 = new Segment(1);
		Segment s2 = new Segment(2);
		Segment s3 = new Segment(3);
 
		c1.addControlledSegment(s1);
		c1.addControlledSegment(s2);
		c1.addControlledSegment(s3);
 
		//build station Bucuresti
		Controler c2 = new Controler("Bucuresti");
 
		Segment s4 = new Segment(4);
		Segment s5 = new Segment(5);
		Segment s6 = new Segment(6);
 
		c2.addControlledSegment(s4);
		c2.addControlledSegment(s5);
		c2.addControlledSegment(s6);
 
		//connect the 2 controllers
 
		c1.setNeighbourController(c2);
		c2.setNeighbourController(c1);
 
		//testing
 
		Train t1 = new Train("Bucuresti", "IC-001");
		s1.arriveTrain(t1);
 
		Train t2 = new Train("Cluj-Napoca","R-002");
		s5.arriveTrain(t2);
 
 
		c1.displayStationState();
		c2.displayStationState();
 
		System.out.println("\nStart train control\n");
 
                //execute 3 times controller steps
		for(int i = 0;i<3;i++){
			System.out.println("### Step "+i+" ###");
			c1.controlStep();
			c2.controlStep();
 
			System.out.println();
 
			c1.displayStationState();
			c2.displayStationState();
		}		
	}
 
}
 
class Controler{
 
	String stationName;
 
	Controler neighbourController;
 
	//storing station train track segments
	ArrayList<Segment> list = new ArrayList<Segment>(); 
 
	public Controler(String gara) {
		stationName = gara;
	}
 
	void setNeighbourController(Controler v){
		neighbourController = v;
	}
 
	void addControlledSegment(Segment s){
		list.add(s);
	}
 
	/**
         * Check controlled segments and return the id of the first free segment or -1 in case there is no free segment in this station
         * 
	 * @return
	 */
	int getFreeSegmentId(){
		for(Segment s:list){
			if(s.hasTrain()==false)
				return s.id;
		}
		return -1;
	}
 
	void controlStep(){
			//check which train must be sent
 
			for(Segment segment:list){
				if(segment.hasTrain()){
					Train t = segment.getTrain();
 
					if(t.getDestination().equals(neighbourController.stationName)){
						//check if there is a free segment
						int id = neighbourController.getFreeSegmentId();
						if(id==-1){
							System.out.println("Trenul +"+t.name+"din gara "+stationName+" nu poate fi trimis catre "+neighbourController.stationName+". Nici un segment disponibil!");
							return;
						}
						//send train
						System.out.println("Trenul "+t.name+" pleaca din gara "+stationName +" spre gara "+neighbourController.stationName);
						segment.departTRain();
						neighbourController.arriveTrain(t,id);
					}
 
				}
			}//.for
 
		}//.
 
 
	public void arriveTrain(Train t, int idSegment){
		for(Segment segment:list){
			//search id segment and add train on it
			if(segment.id == idSegment)
				if(segment.hasTrain()==true){
					System.out.println("CRASH! Train "+t.name+" colided with "+segment.getTrain().name+" on segment "+segment.id+" in station "+stationName);
					return;
				}else{
					System.out.println("Train "+t.name+" arrived on segment "+segment.id+" in station "+stationName);
					segment.arriveTrain(t);
					return;
				}			
		}
 
		//this should not happen
		System.out.println("Train "+t.name+" cannot be received "+stationName+". Check controller logic algorithm!");
 
	}
 
 
	public void displayStationState(){
		System.out.println("=== STATION "+stationName+" ===");
		for(Segment s:list){
			if(s.hasTrain())
				System.out.println("|----------ID="+s.id+"__Train="+s.getTrain().name+" to "+s.getTrain().destination+"__----------|");
			else
				System.out.println("|----------ID="+s.id+"__Train=______ catre ________----------|");
		}
	}
}
 
 
class Segment{
	int id;
	Train train;
 
	Segment(int id){
		this.id = id;
	}
 
	boolean hasTrain(){
		return train!=null;
	}
 
	Train departTRain(){
		Train tmp = train;
		this.train = null;
		return tmp;
	}
 
	void arriveTrain(Train t){
		train = t;
	}
 
	Train getTrain(){
		return train;
	}
}
 
class Train{
	String destination;
	String name;
 
	public Train(String destinatie, String nume) {
		super();
		this.destination = destinatie;
		this.name = nume;
	}
 
	String getDestination(){
		return destination;
	}
 
}

Requirements:

• Create UML class diagram for the application above;
• Modify the application so that a controller to communicate with an unlimited number of neighbor controllers;
• Modify main method to demonstrate to behavior of the new application and crate a network of 3 stations interconnected one to each-other.

Implement a home automation simulator application based on the following requirements:

1. Home automation system is composed of: control unit, temperature sensor, fire sensor, alarm unit, heating unit, cooling unit, gsm unit;
2. Fire rule: if fire sensor is activated then start alarm and call owner
3. Temperature rules: if temperature is lower than a preset value then start heating unit; if temperature is higher than a preset value then start cooling unit;
4. System includes one temperature sensor but multiple fire sensors;
5. All controller actions are stored in an system_logs.txt;
6. Use Singleton design pattern for the control unit;
7. All system actions are simulated by simple console messages;
8. For testing your application use the provided code bellow.

import java.util.Random;
 
public class HomeAutomation {
 
     public static void main(String[] args){
 
         //test using an annonimous inner class 
         Home h = new Home(){
             protected void setValueInEnvironment(Event event){
                System.out.println("New event in environment "+event); 
             }
             protected void controllStep(){
                 System.out.println("Control step executed");
             }
         };
         h.simulate();
     }
}
 
abstract class Home {
    private Random r = new Random();
    private final int SIMULATION_STEPS = 20;
 
    protected abstract void setValueInEnvironment(Event event);
    protected abstract void controllStep();
 
    private Event getHomeEvent(){
        //randomly generate a new event;            
        int k = r.nextInt(100);
        if(k<30)
            return new NoEvent();
        else if(k<60)
            return new FireEvent(r.nextBoolean());
        else
            return new TemperatureEvent(r.nextInt(50));              
    }   
 
    public void simulate(){
        int k = 0;
        while(k <SIMULATION_STEPS){
            Event event = this.getHomeEvent();
            setValueInEnvironment(event);
            controllStep();
 
            try {
                Thread.sleep(300);
            } catch (InterruptedException ex) {
               ex.printStackTrace();
            }
 
            k++;
        }
    }
 
}
 
abstract class Event {
 
    EventType type;
 
    Event(EventType type) {
        this.type = type;
    }
 
    EventType getType() {
        return type;
    }
 
}
 
class TemperatureEvent extends Event {
 
    private int vlaue;
 
    TemperatureEvent(int vlaue) {
        super(EventType.FIRE.TEMPERATURE);
        this.vlaue = vlaue;
    }
 
    int getVlaue() {
        return vlaue;
    }
 
    @Override
    public String toString() {
        return "TemperatureEvent{" + "vlaue=" + vlaue + '}';
    }        
 
}
 
class FireEvent extends Event {
 
    private boolean smoke;
 
    FireEvent(boolean smoke) {
        super(EventType.FIRE);
        this.smoke = smoke;
    }
 
    boolean isSmoke() {
        return smoke;
    }
 
    @Override
    public String toString() {
        return "FireEvent{" + "smoke=" + smoke + '}';
    }
 
}
 
class NoEvent extends Event{
 
    NoEvent() {
        super(EventType.NONE);
    }    
 
    @Override
    public String toString() {
        return "NoEvent{}";
    }   
}
 
enum EventType {
    TEMPERATURE, FIRE, NONE;
}
)}