https://github.com/ghindea/ebanking-app
OOP homework
https://github.com/ghindea/ebanking-app
Last synced: about 1 year ago
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OOP homework
- Host: GitHub
- URL: https://github.com/ghindea/ebanking-app
- Owner: Ghindea
- Created: 2024-02-16T21:34:48.000Z (over 2 years ago)
- Default Branch: master
- Last Pushed: 2024-02-16T21:47:50.000Z (over 2 years ago)
- Last Synced: 2025-02-14T13:39:02.571Z (over 1 year ago)
- Language: Java
- Homepage:
- Size: 174 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# eBanking App
Homework realised for OOP course, second year, FACC-CSIT
made by: [Ghindea Daniel-Teodor](https://github.com/Ghindea)
[requirements](./Proiect%20POO%202024.pdf)
---
### Synopsis:
This program consists of five main classes that define the properties of the used objects and their functionalities:
- `Main` - the main class that contains methods for loading the data from the input files and for running the program
- `Bank` - **singleton** class
- contains the list of all the users and the list of all the stocks in the system.
- contains a hashmap of all exchange rates
- contains methods for all functionalities of the bank
- `User` - **observer** class
- class that contains the properties of a user and the methods for the functionalities of the user
- contains a list of all the notifications of the user that are received when money are deposited to an account or when a friend transfers money to the user
- contains an inner class `UserBuilder` that is used to **build** a user object
- `Stock` - **subject** class
- class that contains the properties of a stock and the methods for the functionalities of the stock
- `ListPropery` - **strategy** class
- used to implement the strategy pattern for the listing of different types of properties of a user (details, portfolio, notifications)
### Chosen designs patterns:
- [x] Singleton
- [x] Strategy
- [x] Builder
- [x] Observer
### Extra:
I have implemented this test to check Observer DP:
```java
public void test9() throws IOException {
ByteArrayOutputStream outPrintStream = new ByteArrayOutputStream();
System.setOut(new PrintStream(outPrintStream));
String commandFolder = "test9/";
Main.main(getInputArgs(commandFolder));
String output = outPrintStream.toString();
assertJsonLineAreEqual(output, commandFolder);
System.setOut(System.out);
}
```
with the following input:
```
CREATE USER bob.stucky@email.com Bob Stucky 687 Swanson Dr. New York NY 10024
LIST USER bob.stucky@email.com
ADD ACCOUNT bob.stucky@email.com USD
ADD MONEY bob.stucky@email.com USD 50000
CREATE USER daniel.ghindea@gmail.com Daniel Ghindea Str.Politemnistului 1 Bucuresti Romania
ADD ACCOUNT daniel.ghindea@gmail.com USD
ADD MONEY daniel.ghindea@gmail.com USD 100000
ADD FRIEND daniel.ghindea@gmail.com bob.stucky@email.com
TRANSFER MONEY bob.stucky@email.com daniel.ghindea@gmail.com USD 5000
LIST USER daniel.ghindea@gmail.com
LIST NOTIFICATIONS daniel.ghindea@gmail.com
```
### Encountered problems:
Before I came up with the idea of implementing Strategy DP I have encountered this situation:
```java
public void listUser(String[] command) throws UserNotFoundException{
/*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* I thought that tests don't contain invalid users, and when I wanted to make sure InteliJ
* suggested to use AtomicReference, so I did it, but that raised me questions about lambdas.
*
* -> how the process of using variables from outside the lambda expression works? (o_O)?
* -> what is functional programming?
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
AtomicReference ok = new AtomicReference<>(false);
users.forEach(user -> {
if(user.getEmail().equals(command[2])) {
System.out.println(user); ok.set(true);
}
});
if(!ok.get()) throw new UserNotFoundException(command[2]);
}
```