Lesson 49 (optional)

src/com/walking/lesson49_optional/task1/Main.java

@@ -1,5 +1,11 @@
 package com.walking.lesson49_optional.task1;
 
+import com.walking.lesson49_optional.task1.model.Car;
+import com.walking.lesson49_optional.task1.service.CarService;
+
+import java.util.Optional;
+import java.util.Scanner;
+
 /**
  * Реализуйте задачу 2 урока 43:
  * <a href="https://github.com/KFalcon2022/practical-tasks/tree/master/src/com/walking/lesson43_map/task2">...</a>
@@ -8,5 +14,49 @@
  */
 public class Main {
     public static void main(String[] args) {
+        CarService carService = new CarService(initCars());
+
+        Car desiredCar = createCar();
+        Optional<Car> foundCar = carService.findCar(desiredCar);
+
+        String found = foundCar.map("Найдена машина:\n%s"::formatted)
+                               .orElse("Подходящая машина не обнаружена");
+
+        System.out.println(found);
+    }
+
+    private static Car createCar() {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Enter a car's number");
+        String number = scanner.nextLine();
+
+        System.out.println("Enter a car's color");
+        String color = scanner.nextLine();
+
+        System.out.println("Enter a car's year");
+        int year = scanner.nextInt();
+
+        System.out.println("Enter a actuality of technical inspection");
+        boolean actualTechnicalInspection = scanner.nextBoolean();
+
+        scanner.close();
+
+        return new Car(number, year, color, actualTechnicalInspection);
+    }
+
+    private static Car[] initCars() {
+        Car car1 = new Car("RR-111-RR", 2015, "yellow", true);
+        Car car2 = new Car("RR-222-RR", 2016, "yellow", true);
+        Car car3 = new Car("RR-333-RR", 2017, "yellow", true);
+        Car car4 = new Car("RR-444-RR", 2018, "yellow", true);
+        Car car5 = new Car("RR-555-RR", 2018, "yellow", true);
+        Car car6 = new Car("RR-777-RR", 2015, "yellow", true);
+        Car car7 = new Car("RR-777-RR", 2018, "yellow", true);
+        Car car8 = new Car("RR-888-RR", 2018, "yellow", true);
+        Car car9 = new Car("RR-999-RR", 2018, "yellow", true);
+        Car car10 = new Car("RR-000-RR", 2018, "yellow", true);
+
+        return new Car[]{car1, car2, car3, car4, car5, car6, car7, car8, car9, car10};
     }
 }

src/com/walking/lesson49_optional/task1/model/Car.java

@@ -0,0 +1,45 @@
+package com.walking.lesson49_optional.task1.model;
+
+
+public class Car {
+    private final CarIdentifier identifier;
+
+    private String color;
+    private boolean actualTechnicalInspection;
+
+    public Car(String number, int year, String color, boolean actualTechnicalInspection) {
+        this(new CarIdentifier(number, year), color, actualTechnicalInspection);
+    }
+
+    public Car(CarIdentifier identifier, String color, boolean actualTechnicalInspection) {
+        this.identifier = identifier;
+        this.color = color;
+        this.actualTechnicalInspection = actualTechnicalInspection;
+    }
+
+    public CarIdentifier getIdentifier() {
+        return identifier;
+    }
+
+    public String getColor() {
+        return color;
+    }
+
+    public void setColor(String color) {
+        this.color = color;
+    }
+
+    public boolean isActualTechnicalInspection() {
+        return actualTechnicalInspection;
+    }
+
+    public void setActualTechnicalInspection(boolean actualTechnicalInspection) {
+        this.actualTechnicalInspection = actualTechnicalInspection;
+    }
+
+    @Override
+    public String toString() {
+        return "number: %s | year: %d | color: %s | actualTechnicalInspection: %s".formatted(identifier.getNumber(),
+                identifier.getYear(), color, actualTechnicalInspection ? "actual" : "not actual");
+    }
+}

src/com/walking/lesson49_optional/task1/model/CarIdentifier.java

@@ -0,0 +1,44 @@
+package com.walking.lesson49_optional.task1.model;
+
+import java.util.Objects;
+
+public class CarIdentifier {
+    private final String number;
+    private final int year;
+
+    public CarIdentifier(String number, int year) {
+        this.number = number;
+        this.year = year;
+    }
+
+    public String getNumber() {
+        return number;
+    }
+
+    public int getYear() {
+        return year;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+
+        if (o == null || !getClass().equals(o.getClass())) {
+            return false;
+        }
+
+        CarIdentifier identifier = (CarIdentifier) o;
+
+        return year == identifier.year && Objects.equals(number, identifier.number);
+    }
+
+    @Override
+    public int hashCode() {
+        int hashcode = number.hashCode();
+        hashcode += 31 * year;
+
+        return hashcode;
+    }
+}

src/com/walking/lesson49_optional/task1/service/CarService.java

@@ -0,0 +1,24 @@
+package com.walking.lesson49_optional.task1.service;
+
+import com.walking.lesson49_optional.task1.model.Car;
+import com.walking.lesson49_optional.task1.model.CarIdentifier;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+
+public class CarService {
+    private final Map<CarIdentifier, Car> cars = new HashMap<>();
+
+    public CarService(Car[] cars) {
+        for (Car car : cars) {
+            this.cars.put(car.getIdentifier(), car);
+        }
+    }
+
+    public Optional<Car> findCar(Car car) {
+        return Optional.ofNullable(car)
+                       .map(Car::getIdentifier)
+                       .map(cars::get);
+    }
+}

src/com/walking/lesson49_optional/task2/Main.java

@@ -1,5 +1,15 @@
 package com.walking.lesson49_optional.task2;
 
+import com.walking.lesson49_optional.task2.model.Car;
+import com.walking.lesson49_optional.task2.model.CarIdentifier;
+import com.walking.lesson49_optional.task2.model.Home;
+import com.walking.lesson49_optional.task2.model.Person;
+import com.walking.lesson49_optional.task2.service.CarService;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
 /**
  * Реализуйте рад классов:
  * 1. Жилье, должен иметь поле «адрес»;
@@ -17,5 +27,33 @@
  */
 public class Main {
     public static void main(String[] args) {
+        Home testHome = new Home("ADDRESS");
+        Car testCar = new Car(new CarIdentifier("NUMBER", 2000), null, "red", true);
+        Person testCarOwner = new Person("OWNER", null, null, new ArrayList<>(), testHome, testCar, "fireman");
+        testCar.setOwner(testCarOwner);
+        Person testCarOwnerChild = new Person("CHILD", null, testCarOwner, null, testHome, null, "fireman");
+        testCarOwner.addChild(testCarOwnerChild);
+
+        CarService carService = new CarService(new Car[]{testCar});
+
+        Optional<String> foundAddress = carService.findCar(testCar)
+                                                  .filter(car -> car.getIdentifier()
+                                                                    .getYear() <= 2021)
+                                                  .map(Car::getOwner)
+                                                  .filter(person -> !person.getProfession()
+                                                                           .equals("policeman"))
+                                                  .map(Person::getChildren)
+                                                  .filter(list -> !list.isEmpty())
+                                                  .map(List::getFirst)
+                                                  .filter(person -> !person.getProfession()
+                                                                           .equals("policeman"))
+                                                  .map(Person::getHome)
+                                                  .map(Home::getAddress)
+                                                  .filter(address -> !address.contains("Рублевское шоссе"));
+
+        String address = foundAddress.map("Найден адрес:\n%s"::formatted)
+                                     .orElse("Адресс не найден");
+
+        System.out.println(address);
     }
 }

src/com/walking/lesson49_optional/task2/model/Car.java

@@ -0,0 +1,55 @@
+package com.walking.lesson49_optional.task2.model;
+
+
+public class Car {
+    private final CarIdentifier identifier;
+
+    private Person owner;
+    private String color;
+    private boolean actualTechnicalInspection;
+
+    public Car(String number, int year, Person owner, String color, boolean actualTechnicalInspection) {
+        this(new CarIdentifier(number, year), owner, color, actualTechnicalInspection);
+    }
+
+    public Car(CarIdentifier identifier, Person owner, String color, boolean actualTechnicalInspection) {
+        this.identifier = identifier;
+        this.owner = owner;
+        this.color = color;
+        this.actualTechnicalInspection = actualTechnicalInspection;
+    }
+
+    public CarIdentifier getIdentifier() {
+        return identifier;
+    }
+
+    public Person getOwner() {
+        return owner;
+    }
+
+    public void setOwner(Person owner) {
+        this.owner = owner;
+    }
+
+    public String getColor() {
+        return color;
+    }
+
+    public void setColor(String color) {
+        this.color = color;
+    }
+
+    public boolean isActualTechnicalInspection() {
+        return actualTechnicalInspection;
+    }
+
+    public void setActualTechnicalInspection(boolean actualTechnicalInspection) {
+        this.actualTechnicalInspection = actualTechnicalInspection;
+    }
+
+    @Override
+    public String toString() {
+        return "number: %s | year: %d  | owner: %s | color: %s | actualTechnicalInspection: %s".formatted(identifier.getNumber(),
+                identifier.getYear(), owner.getName(), color, actualTechnicalInspection ? "actual" : "not actual");
+    }
+}

src/com/walking/lesson49_optional/task2/model/CarIdentifier.java

@@ -0,0 +1,44 @@
+package com.walking.lesson49_optional.task2.model;
+
+import java.util.Objects;
+
+public class CarIdentifier {
+    private final String number;
+    private final int year;
+
+    public CarIdentifier(String number, int year) {
+        this.number = number;
+        this.year = year;
+    }
+
+    public String getNumber() {
+        return number;
+    }
+
+    public int getYear() {
+        return year;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+
+        if (o == null || !getClass().equals(o.getClass())) {
+            return false;
+        }
+
+        CarIdentifier identifier = (CarIdentifier) o;
+
+        return year == identifier.year && Objects.equals(number, identifier.number);
+    }
+
+    @Override
+    public int hashCode() {
+        int hashcode = number.hashCode();
+        hashcode += 31 * year;
+
+        return hashcode;
+    }
+}

src/com/walking/lesson49_optional/task2/model/Home.java

@@ -0,0 +1,13 @@
+package com.walking.lesson49_optional.task2.model;
+
+public class Home {
+    private final String address;
+
+    public Home(String address) {
+        this.address = address;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+}