// The MIT License (MIT)

//

// Copyright (c) 2018 Robert C. Seacord

//

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

// copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in all

// copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

// SOFTWARE.

package ser101j;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.lang.reflect.Field;

import java.util.Objects;

enum Gender {

MALE, FEMALE

}

public class Person implements java.io.Serializable {

// private static final long serialVersionUID = 9043182744481133479L;

private String firstName;

private String lastName;

private String socialSecurity;

private int age;

private Person spouse;

// Gender field must be public for reflection to work

// public Gender gender;

public Person(String fn, String ln, String socialSecurity, int a) {

this.firstName = fn;

this.lastName = ln;

this.socialSecurity = socialSecurity;

this.age = a;

}

// public Person(String fn, String ln, String socialSecurity, int a, Gender g) {

// this.firstName = fn;

// this.lastName = ln;

// this.socialSecurity = socialSecurity;

// this.age = a;

// this.gender = g;

// }

// public Gender getGender() { return gender; }

// public void setGender(Gender value) { gender = value; }

public String getFirstName() {

return this.firstName;

}

public void setFirstName(String value) {

this.firstName = value;

}

public String getLastName() {

return this.lastName;

}

public void setLastName(String value) {

this.lastName = value;

}

public int getAge() {

return this.age;

}

public void setAge(int value) {

this.age = value;

}

public Person getSpouse() {

return this.spouse;

}

public void setSpouse(Person value) {

this.spouse = value;

}

public String getSocialSecurity() {

return this.socialSecurity;

}

public void setSocialSecurity(String value) {

this.socialSecurity = value;

}

@Override

public String toString() {

return "[Person: firstName=" + this.firstName + " lastName=" + this.lastName +

" age=" + this.age + " spouse=" + this.spouse.getFirstName() + "]";

}

public static void main(String[] args) throws IOException, ClassNotFoundException {

Person p1 = new Person(

"John",

"Doe",

"012-34-5678",

25

// , Gender.MALE

);

Person p2 = new Person(

"Jane",

"Doe",

"987-65-4321",

24

// , Gender.FEMALE

);

p1.setSpouse(p2);

p2.setSpouse(p1);

// Only serialize Person when gender field is not present

Class<?> personClass = p1.getClass();

try {

Field genderField = personClass.getField("gender");

} catch (NoSuchFieldException e) {

try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("tempdata.ser"))) {

oos.writeObject(p1);

}

}

Person p;

try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("tempdata.ser"))) {

p = (Person) ois.readObject();

}

if (!Objects.equals(p.getFirstName(), "John") ||

!Objects.equals(p.getSpouse().getFirstName(), "Jane")) {

System.err.println("Object changed during deserialization");

} else {

System.out.println("Object successfully deserialized");

}

} // end main

} // end class