/* * 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.specialcase; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** *
The Special Case Pattern is a software design pattern that encapsulates particular cases * into subclasses that provide special behaviors.
* *In this example ({@link ReceiptViewModel}) encapsulates all particular cases.
*/ public class App { private static final Logger LOGGER = LoggerFactory.getLogger(App.class); /** * Program entry point. */ public static void main(String[] args) { // DB seeding LOGGER.info("Db seeding: " + "1 user: {\"ignite1771\", amount = 1000.0}, " + "2 products: {\"computer\": price = 800.0, \"car\": price = 20000.0}"); Db.getInstance().seedUser("ignite1771", 1000.0); Db.getInstance().seedItem("computer", 800.0); Db.getInstance().seedItem("car", 20000.0); final var applicationServices = new ApplicationServicesImpl(); ReceiptViewModel receipt; LOGGER.info("[REQUEST] User: " + "abc123" + " buy product: " + "tv"); receipt = applicationServices.loggedInUserPurchase("abc123", "tv"); receipt.show(); MaintenanceLock.getInstance().setLock(false); LOGGER.info("[REQUEST] User: " + "abc123" + " buy product: " + "tv"); receipt = applicationServices.loggedInUserPurchase("abc123", "tv"); receipt.show(); LOGGER.info("[REQUEST] User: " + "ignite1771" + " buy product: " + "tv"); receipt = applicationServices.loggedInUserPurchase("ignite1771", "tv"); receipt.show(); LOGGER.info("[REQUEST] User: " + "ignite1771" + " buy product: " + "car"); receipt = applicationServices.loggedInUserPurchase("ignite1771", "car"); receipt.show(); LOGGER.info("[REQUEST] User: " + "ignite1771" + " buy product: " + "computer"); receipt = applicationServices.loggedInUserPurchase("ignite1771", "computer"); receipt.show(); } }