Implement Own Implementation of State Design Pattern through Revisiting Previous Assessment
parent
9ee08e7713
commit
fbe7e2294d
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package bank.assessment;
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import bank.assessment.states.BankAccountStates;
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import bank.assessment.states.NotCreatedState;
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public abstract class BankAccount {
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private String username, password, accountNumber, sortCode;
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private double balance;
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private double overdraftLimit;
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BankAccountStates bankAccountState;
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BankAccount() { this.bankAccountState = NotCreatedState.getInstance(this); }
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BankAccount(String username, String password, String accountNumber, String sortCode) {
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this.username = username;
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this.password = password;
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this.accountNumber = accountNumber;
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this.sortCode = sortCode;
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this.bankAccountState = NotCreatedState.getInstance(this);
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}
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public BankAccount(String username, String password, String accountNumber, String sortCode, double overdraftLimit) {
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this.username = username;
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this.password = password;
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this.accountNumber = accountNumber;
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this.sortCode = sortCode;
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this.overdraftLimit = overdraftLimit;
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this.bankAccountState = NotCreatedState.getInstance(this);
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}
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// Method Actions To Change State
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public void changeBankAccountState(BankAccountStates bankAccountState) { this.bankAccountState = bankAccountState; }
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public void createAccount(Person person) { this.bankAccountState.createAccount(person); }
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public void logIn() { this.bankAccountState.logIn(); }
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public void logOut() {
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this.bankAccountState.logOut();
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}
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public void deposit() { this.bankAccountState.deposit(); }
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public boolean withdraw() { return this.bankAccountState.withdraw(); }
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public void viewDetails() {
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this.bankAccountState.viewDetails();
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}
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public void deleteAccount() { this.bankAccountState.deleteAccount(); }
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// Getters & Setters
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public String getUsername() {
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return username;
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}
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public void setUsername(String username) {
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this.username = username;
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}
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public String getPassword() {
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return password;
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}
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public void setPassword(String password) {
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this.password = password;
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}
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public String getAccountNumber() {
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return accountNumber;
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}
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public void setAccountNumber(String accountNumber) {
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this.accountNumber = accountNumber;
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}
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public String getSortCode() {
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return sortCode;
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}
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public void setSortCode(String sortCode) {
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this.sortCode = sortCode;
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}
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public double getBalance() {
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return balance;
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}
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public void setBalance(double balance) {
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this.balance = balance;
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}
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public double getOverdraftLimit() {
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return overdraftLimit;
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}
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public void setOverdraftLimit(double overdraftLimit) {
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this.overdraftLimit = overdraftLimit;
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}
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void displayBalance() {
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System.out.println("Current Account Balance: " + balance);
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}
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@Override
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public String toString() {
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return "BankAccount{" +
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"username='" + username + '\'' +
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", password='" + password + '\'' +
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", accountNumber='" + accountNumber + '\'' +
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", sortCode='" + sortCode + '\'' +
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", balance=" + String.format("£%.2f", balance) +
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", overdraftLimit=" + String.format("£%.2f", overdraftLimit) +
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'}';
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}
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}
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package bank.assessment;
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public class BasicAccount extends BankAccount {
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public BasicAccount() { }
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public BasicAccount(String username, String password, String accountNumber, String sortCode) {
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super(username, password, accountNumber, sortCode);
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}
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public BasicAccount(String username, String password, String accountNumber, String sortCode, double overdraftLimit) {
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super(username, password, accountNumber, sortCode, overdraftLimit);
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}
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}
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package bank.assessment;
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import java.util.Scanner;
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public class Console {
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public static final Scanner INPUT = new Scanner(System.in);
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}
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package bank.assessment;
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public class Main {
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public static void main(String[] args) {
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// Note:
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// For the first time in my life. This project will include no error handling for the
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// user inputs because the focus of the project is the design. Not going to handle any users that are "dumb" :)
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Person person = new Person();
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person.setBankAccount(new BasicAccount());
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getPersonDetails(person);
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int choice;
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do
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{
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System.out.println("""
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Welcome Glasgow University Banking\s
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Press 1: Register With Us
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Press 2: Log In
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Press 3: View Details
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Press 4: Deposit Money
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Press 5: Withdraw Money
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Press 6: Log Out
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Press 7: Delete Account
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Press 8: Quit
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""");
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choice = Integer.parseInt(Console.INPUT.nextLine());
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switch (choice) {
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case 1 -> person.getBankAccount().createAccount(person);
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case 2 -> person.getBankAccount().logIn();
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case 3 -> person.getBankAccount().viewDetails();
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case 4 -> person.getBankAccount().deposit();
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case 5 -> person.getBankAccount().withdraw();
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case 6 -> person.getBankAccount().logOut();
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case 7 -> person.getBankAccount().deleteAccount();
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}
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} while (choice != 8);
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System.out.println("Thank You For Using Glasgow University Banking! We Hope to See You Soon :D");
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System.exit(0);
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}
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private static void getPersonDetails(Person person) {
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System.out.println("What is Your Forename?");
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person.setForename(Console.INPUT.nextLine());
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System.out.println("What is Your Surname?");
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person.setSurname(Console.INPUT.nextLine());
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System.out.println("What is Your Email Address?");
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person.setEmailAddress(Console.INPUT.nextLine());
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System.out.println("What is Your Date of Birth? (Format: DD/MM/YYYY)");
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person.setDateOfBirth(Console.INPUT.nextLine());
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}
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}
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package bank.assessment;
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public class Person {
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private String forename, surname, emailAddress, dateOfBirth;
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private BankAccount bankAccount;
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public Person() { }
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public Person(String forename, String surname, String emailAddress, String dateOfBirth) {
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this.forename = forename;
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this.surname = surname;
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this.emailAddress = emailAddress;
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this.dateOfBirth = dateOfBirth;
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}
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public String getForename() {
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return forename;
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}
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public void setForename(String forename) {
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this.forename = forename;
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}
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public String getSurname() {
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return surname;
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}
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public void setSurname(String surname) {
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this.surname = surname;
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}
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public String getEmailAddress() {
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return emailAddress;
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}
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public void setEmailAddress(String emailAddress) { this.emailAddress = emailAddress; }
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public String getDateOfBirth() {
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return dateOfBirth;
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}
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public void setDateOfBirth(String dateOfBirth) {
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this.dateOfBirth = dateOfBirth;
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}
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public BankAccount getBankAccount() {
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return bankAccount;
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}
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public void setBankAccount(BankAccount bankAccount) {
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this.bankAccount = bankAccount;
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}
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@Override
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public String toString() {
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return "Person{" +
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"forename='" + forename + '\'' +
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", surname='" + surname + '\'' +
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", emailAddress='" + emailAddress + '\'' +
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", dateOfBirth='" + dateOfBirth + '\'' +
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", bankAccount=" + bankAccount +
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'}';
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}
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}
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package bank.assessment;
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public class PremiumAccount extends BasicAccount {
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public PremiumAccount(String username, String password, String accountNumber, String sortCode, double overdraftLimit) {
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super(username, password, accountNumber, sortCode, overdraftLimit);
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}
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@Override
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public boolean withdraw() {
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System.out.println("How Much Money Do You Want To Withdraw?");
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double amount = Double.parseDouble(Console.INPUT.nextLine());
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if (amount <= (getBalance() + getOverdraftLimit())) {
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setBalance(getBalance() - amount);
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System.out.println("Withdraw Successful!");
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displayBalance();
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return true;
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} else {
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System.out.println("Insufficient Funds Available to Withdraw! Try Again!");
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return false;
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}
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}
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}
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package bank.assessment.states;
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import bank.assessment.Person;
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public interface BankAccountStates {
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void createAccount(Person person);
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void logIn();
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void logOut();
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void deposit();
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boolean withdraw();
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void viewDetails();
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void deleteAccount();
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}
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package bank.assessment.states;
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import bank.assessment.BankAccount;
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import bank.assessment.Console;
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import bank.assessment.Person;
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public class LoggedInState implements BankAccountStates {
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BankAccount bankAccount;
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private static LoggedInState instance;
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private LoggedInState(BankAccount bankAccount) {
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this.bankAccount = bankAccount;
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}
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public static LoggedInState getInstance(BankAccount bankAccount) {
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return instance == null ? instance = new LoggedInState(bankAccount) : instance;
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}
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@Override
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public void createAccount(Person person) {
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System.out.println("This Account Is Already Registered With Us. Please Log In!");
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}
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@Override
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public void logIn() {
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System.out.println("You Are Already Logged In!");
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}
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@Override
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public void logOut() {
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// Log out!
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}
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@Override
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public void deposit() {
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System.out.println("How Much Money Do You Want To Deposit?");
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double cashToDeposit = Double.parseDouble(Console.INPUT.nextLine());
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if (cashToDeposit >= 0) {
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bankAccount.setBalance(bankAccount.getBalance() + cashToDeposit);
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} else {
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System.out.println("Amount Entered Not Valid! Try Again!");
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}
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}
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@Override
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public boolean withdraw() {
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return bankAccount.withdraw();
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}
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@Override
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public void viewDetails() {
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System.out.println("Your Current Bank Details:");
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System.out.println(bankAccount);
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}
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@Override
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public void deleteAccount() {
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bankAccount.changeBankAccountState(NotCreatedState.getInstance(bankAccount));
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System.out.println("Account Deleted! We're Sad To See You Go :(");
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}
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}
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@ -0,0 +1,72 @@
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package bank.assessment.states;
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import bank.assessment.BankAccount;
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import bank.assessment.BasicAccount;
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import bank.assessment.Console;
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import bank.assessment.Person;
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public class LoggedOutState implements BankAccountStates {
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BankAccount bankAccount;
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private static LoggedOutState instance;
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private LoggedOutState(BankAccount bankAccount) {
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this.bankAccount = bankAccount;
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}
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public static LoggedOutState getInstance(BankAccount bankAccount) {
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return instance == null ? instance = new LoggedOutState(bankAccount) : instance;
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}
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@Override
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public void createAccount(Person person) {
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System.out.println("You Have Already Created An Account!");
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}
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@Override
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public void logIn() {
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System.out.println("Please Enter Your Login Username: ");
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String loginUsername = Console.INPUT.nextLine();
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System.out.println("Please Enter Your Login Password: ");
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String loginPassword = Console.INPUT.nextLine();
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if (!bankAccount.getUsername().equalsIgnoreCase(loginUsername) || !bankAccount.getPassword().equalsIgnoreCase(loginPassword)) {
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System.out.println("Uh Oh Error! Incorrect Username Or Password Entered!");
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} else {
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System.out.printf("Welcome Back '%s'", bankAccount.getUsername());
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bankAccount.changeBankAccountState(LoggedInState.getInstance(bankAccount));
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}
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}
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@Override
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public void logOut() {
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System.out.println("You Have Already Logged Out! Please Log in!");
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}
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@Override
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public void deposit() {
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}
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@Override
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public boolean withdraw() {
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System.out.println("Please Log In Before Trying To Withdraw Funds!");
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return false;
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}
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@Override
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public void viewDetails() {
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}
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@Override
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public void deleteAccount() {
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bankAccount = new BasicAccount();
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System.out.println("Account Deleted! We're Sad To See You Go :(");
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// Same as?
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// bankAccount = new BasicAccount();
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// System.out.println("Account Deleted! We're Sad To See You Go :(");
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}
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}
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@ -0,0 +1,86 @@
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package bank.assessment.states;
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import bank.assessment.*;
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import java.util.Random;
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public class NotCreatedState implements BankAccountStates {
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BankAccount bankAccount;
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private final Random random = new Random();
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private static NotCreatedState instance;
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private NotCreatedState(BankAccount bankAccount) {
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this.bankAccount = bankAccount;
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}
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public static NotCreatedState getInstance(BankAccount bankAccount) {
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return instance == null ? instance = new NotCreatedState(bankAccount) : instance;
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}
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@Override
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public void createAccount(Person person) {
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System.out.println("Please Enter in a Suitable Username: ");
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String username = Console.INPUT.nextLine();
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System.out.println("Please Enter in a Suitable Password: ");
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String password = Console.INPUT.nextLine();
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String accountNumber = String.valueOf(generateRandomNum(random, 100000, 999999));
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String sortCode = generateRandomNum(random, 10, 99) + "-" + generateRandomNum(random, 10,99) + "-" + generateRandomNum(random, 10,99);
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System.out.println("Would You Like A Premium Account? (Format Y/N)");
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String choice = Console.INPUT.nextLine();
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if (choice.equalsIgnoreCase("y")) {
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System.out.println("What Would You Like Your Overdraft Limit To Be?");
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String overdraftLimit = Console.INPUT.nextLine();
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bankAccount = new PremiumAccount(username, password, accountNumber, sortCode, Double.parseDouble(overdraftLimit));
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} else if (choice.equalsIgnoreCase("n")) {
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bankAccount = new BasicAccount(username, password, accountNumber, sortCode);
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}
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System.out.println("Bank Account Successfully Created!");
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System.out.println("Your Details Are: " + bankAccount);
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bankAccount.changeBankAccountState(LoggedOutState.getInstance(bankAccount));
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person.setBankAccount(bankAccount);
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}
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@Override
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public void logIn() {
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System.out.println("Sorry, Our Systems Couldn't Find Your Details. Please Try Again or Register!");
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}
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@Override
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public void logOut() {
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System.out.println("You Must Be Logged In Before You Can Log Out!");
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}
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@Override
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public void deposit() {
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System.out.println("Sorry, Please Log In First Before Trying Deposit Cash!");
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}
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@Override
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public boolean withdraw() {
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System.out.println("Sorry, Please Log In First Before Trying Withdraw Funds!");
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return false;
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}
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@Override
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public void viewDetails() {
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System.out.println("There Are No Account Details To View, Please Log In or Register!");
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}
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@Override
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public void deleteAccount() {
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System.out.println("No Account Found To Delete, Please Log In!");
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}
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private int generateRandomNum(Random random, int lower, int upper) {
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return lower + random.nextInt(upper) + 1;
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}
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}
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