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@startuml Banking System !define AWSPUML https://raw.githubusercontent.com/awslabs/aws-icons-for-plantuml/v18.0/dist !include AWSPUML/AWSCommon.puml !include AWSPUML/AWSSecurity.puml ' Core Banking Entities class Customer { - customerId: string - firstName: string - lastName: string - email: string - phone: string - dateOfBirth: Date - address: Address - creditScore: number -- + openAccount(accountType: string): Account + closeAccount(account: Account): boolean + applyForLoan(loanAmount: number, loanType: string): LoanApplication + getAccountBalance(account: Account): number + transferFunds(fromAccount: Account, toAccount: Account, amount: number): boolean } class Account { - accountNumber: string - accountType: string - balance: number - interestRate: number - dateOpened: Date + isActive: boolean {readOnly} - minimumBalance: number -- + deposit(amount: number): boolean + withdraw(amount: number): boolean + getBalance(): number + getTransactionHistory(): Transaction[] + calculateInterest(): number + closeAccount(): boolean } class Transaction { - transactionId: string - transactionType: string - amount: number - timestamp: Date - description: string - status: string - fromAccount: Account - toAccount: Account -- + processTransaction(): boolean + validateTransaction(): boolean + getTransactionDetails(): string } class Loan { - loanId: string - loanType: string - principalAmount: number - interestRate: number - termMonths: number - startDate: Date - endDate: Date - monthlyPayment: number - outstandingBalance: number - loanStatus: string -- + calculateMonthlyPayment(): number + makePayment(amount: number): boolean + getRemainingBalance(): number + refinanceLoan(newInterestRate: number): boolean } ' Supporting Entities class Branch { - branchId: string - branchName: string - address: Address - phoneNumber: string - manager: Employee - operatingHours: string -- + openBranch(): boolean + closeBranch(): boolean + addCustomer(customer: Customer): boolean + getBranchDetails(): string } class Employee { - employeeId: string - firstName: string - lastName: string - position: string - department: string - salary: number - hireDate: Date - branch: Branch -- + processTransaction(transaction: Transaction): boolean + approveLoan(loanApplication: LoanApplication): boolean + openCustomerAccount(customer: Customer, accountType: string): Account + getEmployeeDetails(): string } class Address { - street: string - city: string - state: string - zipCode: string - country: string -- + validateAddress(): boolean + getFullAddress(): string + updateAddress(newAddress: Address): boolean } class LoanApplication { - applicationId: string - customer: Customer - loanType: string - requestedAmount: number - applicationDate: Date - applicationStatus: string - creditScore: number - income: number - approvedBy: Employee - approvalDate: Date -- + submitApplication(): boolean + updateStatus(status: string): boolean + getApprovalStatus(): string + calculateLoanTerms(): Loan } ' Relationships Customer "1" -- "0..*" Account : owns Account "1" -- "0..*" Transaction : has Customer "1" -- "0..*" Loan : has Customer "1" -- "0..*" LoanApplication : submits Branch "1" -- "0..*" Customer : serves Branch "1" -- "0..*" Employee : employs Employee "1" -- "1" Branch : "works at" Customer "1" -- "1" Address : "lives at" Branch "1" -- "1" Address : "located at" LoanApplication "1" -- "0..1" Employee : "approved by" LoanApplication "1" -- "0..1" Loan : "results in" ' Styling skinparam classAttributeIconSize 0 skinparam linetype ortho skinparam rectangle { BackgroundColor #LightBlue BorderColor #DarkBlue } skinparam class { BackgroundColor #LightGreen BorderColor #DarkGreen ArrowColor #Black } title Banking System - UML Class Diagram @enduml