/* * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt). * * The MIT License * Copyright © 2014-2022 Ilkka Seppälä * * 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 com.iluwatar.datatransfer; import com.iluwatar.datatransfer.customer.CustomerDto; import com.iluwatar.datatransfer.customer.CustomerResource; import com.iluwatar.datatransfer.product.Product; import com.iluwatar.datatransfer.product.ProductDto; import com.iluwatar.datatransfer.product.ProductResource; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import lombok.extern.slf4j.Slf4j; /** * The Data Transfer Object pattern is a design pattern in which an data transfer object is used to * serve related information together to avoid multiple call for each piece of information. * *
In the first example, {@link App} is a customer details consumer i.e. client to request for * customer details to server. {@link CustomerResource} act as server to serve customer information. * {@link CustomerDto} is data transfer object to share customer information. * *
In the second example, {@link App} is a product details consumer i.e. client to request for * product details to server. {@link ProductResource} acts as server to serve product information. * {@link ProductDto} is data transfer object to share product information. * *
The pattern implementation is a bit different in each of the examples. The first can be
* thought as a traditional example and the second is an enum based implementation.
*/
@Slf4j
public class App {
/**
* Method as act client and request to server for details.
*
* @param args program argument.
*/
public static void main(String[] args) {
// Example 1: Customer DTO
var customerOne = new CustomerDto("1", "Kelly", "Brown");
var customerTwo = new CustomerDto("2", "Alfonso", "Bass");
var customers = new ArrayList<>(List.of(customerOne, customerTwo));
var customerResource = new CustomerResource(customers);
LOGGER.info("All customers:");
var allCustomers = customerResource.customers();
printCustomerDetails(allCustomers);
LOGGER.info("----------------------------------------------------------");
LOGGER.info("Deleting customer with id {1}");
customerResource.delete(customerOne.id());
allCustomers = customerResource.customers();
printCustomerDetails(allCustomers);
LOGGER.info("----------------------------------------------------------");
LOGGER.info("Adding customer three}");
var customerThree = new CustomerDto("3", "Lynda", "Blair");
customerResource.save(customerThree);
allCustomers = customerResource.customers();
printCustomerDetails(allCustomers);
// Example 2: Product DTO
Product tv =
Product.builder().id(1L).name("TV").supplier("Sony").price(1000D).cost(1090D).build();
Product microwave =
Product.builder()
.id(2L)
.name("microwave")
.supplier("Delonghi")
.price(1000D)
.cost(1090D)
.build();
Product refrigerator =
Product.builder()
.id(3L)
.name("refrigerator")
.supplier("Botsch")
.price(1000D)
.cost(1090D)
.build();
Product airConditioner =
Product.builder()
.id(4L)
.name("airConditioner")
.supplier("LG")
.price(1000D)
.cost(1090D)
.build();
List