/**

* Copyright (c) 2024 Araf Karsh Hamid

* 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 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.

* This program and the accompanying materials are dual-licensed under

* either the terms of the Eclipse Public License v1.0 as published by

* the Eclipse Foundation

* or (per the licensee's choosing)

* under the terms of the Apache 2 License version 2.0

* as published by the Apache Software Foundation.

*/

package java16;

/**

* Java 16 Examples

* Record Example - To Eliminate the verbosity in Creating Java Beans

* - Public Accessor Methods

* - Constructor

* - Equals

* - Hashcode

* - toString

* are automatically created

* You can have custom implementations of the above methods..

* Compact Constructors are allowed only in Records.

* You cant add Instance Variables or Instance Initializers

*

* @author: Araf Karsh Hamid

* @version:

* @date:

*/

public class RecordExample {

// Record with Attributes Definition ONLY

record User(String firstName, String lastName, String email, String phone, String dept) {}

// Record with Custom Constructor for Field Validations

record User2(String firstName, String lastName, String email, String phone, String dept) {

User2(String firstName, String lastName, String email, String phone, String dept) {

if(firstName == null || lastName == null) {

throw new IllegalArgumentException("Name should not be NULL! First Name = "+firstName+" Last Name = "+lastName);

}

this.firstName = firstName;

this.lastName = lastName;

this.email = email;

this.phone = phone;

this.dept = dept;

}

}

// Record with Compact Constructor - ONLY Validations are written

record User3(String firstName, String lastName, String email, String phone, String dept) {

User3 {

if(firstName == null || lastName == null) {

throw new IllegalArgumentException("Name should not be NULL! First Name = "+firstName+" Last Name = "+lastName);

}

}

}

public static void main (String[] args) {

// Java 16

System.out.println("JAVA 16 >>>>>--------------------------------------------------------");

System.out.println("Record Example. Test 1: ");

User adminUser = new User("Jane", "Doe", "[email protected]", "111-222-3456", "Engineering");

System.out.println("Admin User = "+adminUser.firstName() + " " + adminUser.lastName());

System.out.println("Admin User = "+adminUser);

System.out.println("Record Example. Test 2: With Custom Constructor");

User2 adminUser2 = new User2("Susan", "Doe", "[email protected]", "111-222-3457", "Engineering");

System.out.println("Admin User = "+adminUser2.firstName() + " " + adminUser2.lastName());

System.out.println("Admin User = "+adminUser2);

System.out.println("Record Example. Test 3: With Compact Constructor");

User3 adminUser3 = new User3("Annie", "Doe", "[email protected]", "111-222-3458", "Engineering");

System.out.println("Admin User = "+adminUser3.firstName() + " " + adminUser3.lastName());

System.out.println("Admin User = "+adminUser3);

System.out.println("Record Example. Test 4: With Compact Constructor & Testing Field Validations");

User3 adminUser4 = new User3("Annie", null, "[email protected]", "111-222-3458", "Engineering");

System.out.println("Admin User = "+adminUser4.firstName() + " " + adminUser4.lastName());

System.out.println("Admin User = "+adminUser4);

}

}