A simple implementation of assignment of Programming Fundamentals in Practice, just for being evaluated for marks so feel free to copy the code 😆

The program may still have some 🐛 bugs. If you find them, please let me know (via e-mail).

Its main ambition is to develop an App Store system. It is a menu-driven, console app that can store apps of the following type:

• EducationApp
• GameApp
• ProductivityApp

An app can only be added for existing developers. The information entered via the app will be persisted in XML files.

Class Name	Code Coverage	Test Results
AppStoreAPI
EducationApp
GameApp
ProductivityApp

• Newly added

  Class Name	Responsibility
  FoundationClassUtility	Extend the functionality of utils package, providing more convenient tools like function pointers, statistics, etc.
  Language	Enumerate all the languages that are available on the App Store.
  Genre	Enumerate the genres that a GameApp belongs to.

  Function pointers are provided in the package, you can use them in this way:

  // Declaring a function using FunctionPointer class void function(FunctionPointer<Void, Integer> callback) { callback.invoke(1234); // Call the method } // Employing lambda (Since Java 8) function((Integer parameter) -> parameter + 20)

• Modified

  Class Name	Modification
  DeveloperAPI, AppStoreAPI	Since the XStream.setupDefaultSecurity() method is deprecated in version 1.4.18 and above, the implementation of the load() method is modified to avoid using the deprecated method.
  DeveloperAPI, AppStoreAPI	Because FileNotFoundException will be thrown if the two XML files do not exist in the specified path, the fileName() method has now been modified to create the file if it does not exist.

• Additional fields

  Class Name	Extra fields	Description
  App	String description	Describe the functionality, target age groups, etc. of an app with brief information.
  App	HashSet<Language> languages	Indicate the languages that an app support.
  App	String currencySymbol	The current currency symbol employed in the App Store system (CNY/EUR/USD/GBP).
  GameApp	HashSet<Genre> genres	Types or styles of a GameApp.

There are several additional functionalities I have written in class main.Driver:

• Add a private field clearScreen which is a function pointer that will be instantiated when the start() method is called. On Windows platform, it will clear the console by using command cls and on macOS or other UNIX-like OS it will do the same operation by print special characters to the console (Not tested).

  Use the following statement when you want to clear all outputs on the console:

  clearScreen.invoke();

• Platform Specified Feature: When the program run on Windows, the window title will be changed into App Store

Apache 2.0 © Ryker Zhu (ZHU He)