package com.codegym.task.task21.task2107;
import java.util.LinkedHashMap;
import java.util.*;
/*
Deep cloning of a map
*/
public class Solution {
public static void main(String[] args) {
Solution solution = new Solution();
solution.users.put("Hubert", new User(172, "Hubert"));
solution.users.put("Zapp", new User(41, "Zapp"));
Solution clone = null;
try {
clone = solution.clone();
System.out.println(solution);
System.out.println(clone);
System.out.println(solution.users);
System.out.println(clone.users);
} catch (CloneNotSupportedException e) {
e.printStackTrace(System.err);
}
}
@Override
public Solution clone() throws CloneNotSupportedException {
Solution solution = (Solution) super.clone();
Map<String, User> copyMap = new LinkedHashMap<>();
solution.users = copyMap;
for(Map.Entry<String, User> pair : users.entrySet()){
copyMap.put(pair.getKey(), pair.getValue());
}
return solution;
}
protected Map<String, User> users = new LinkedHashMap();
public static class User {
int age;
String name;
public User(int age, String name) {
this.age = age;
this.name = name;
}
@Override
public boolean equals(Object o){
if(this == o) return true;
if(!(o instanceof User)) return false;
User user = (User)o;
return Objects.equals(user.age, age) && Objects.equals(user.name, name);
}
@Override
public int hashCode(){
return Objects.hash(name, age);
}
public Object clone()throws CloneNotSupportedException{
User user = (User)super.clone();
return user;
}
}
}