com.javarush.test.level20.lesson07.task03

/* Externalizable Person
Класс Person должен сериализоваться с помощью интерфейса Externalizable.
Подумайте, какие поля не нужно сериализовать.
Исправьте ошибку сериализации.
Сигнатуры методов менять нельзя.
*/
public class Solution {

  public static void main(String[] args) throws IOException, ClassNotFoundException {
    Person person = new Person("Ivan", "Ivanov", 23);
    Person father = new Person("Father", "Father Last Name", 34);
    Person mother = new Person("Mother", "Mother Last Name", 33);
    
    List<Person> children = new ArrayList<>(Arrays.asList(
        new Person("children name1", "children last name1", 34),
        new Person("children name 2", " children last name 2", 45)
    ));

    person.setFather(father);
    person.setMother(mother);
    person.setChildren(children);

    System.out.println("before : " + person);

    String path = "/Users/admin/Desktop/properties.txt";
    ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(path));
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream(path));

    oos.writeObject(person);
    Person deserializablePerson = (Person) ois.readObject();

    System.out.println("after : " + deserializablePerson);
  }

  public static class Person implements Externalizable {

    private String firstName;
    private String lastName;
    private int age;
    private Person mother;
    private Person father;
    private List<Person> children;

    public Person() {

    }

    public Person(String firstName, String lastName, int age) {
      this.firstName = firstName;
      this.lastName = lastName;
      this.age = age;
    }

    public void setMother(Person mother) {
      this.mother = mother;
    }

    public void setFather(Person father) {
      this.father = father;
    }

    public void setChildren(List<Person> children) {
      this.children = children;
    }

    @Override
    public void writeExternal(ObjectOutput out) throws IOException {
      out.writeObject(firstName);
      out.writeObject(lastName);
      out.writeInt(age);
      out.writeObject(mother);
      out.writeObject(father);
      out.writeObject(children);
    }

    @Override
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
      firstName = (String) in.readObject();
      lastName = (String) in.readObject();
      age = in.readInt();
      mother = (Person) in.readObject();
      father = (Person) in.readObject();
      children = (List) in.readObject();
    }

    @Override
    public String toString() {
      return firstName + " " + lastName + " " + age + " " + mother.firstName + " " +
          father.firstName + " " + children.get(0).firstName + " " +
          children.get(1).firstName;
    }
  }
}