Class DiscountApprovalService

java.lang.Object
com.university.bookstore.chain.DiscountApprovalService
public class DiscountApprovalService extends Object
Service for managing discount approval using the Chain of Responsibility pattern. Builds and manages the approval chain and processes discount requests.

This service demonstrates the Chain of Responsibility pattern by creating a hierarchy of approval handlers and processing requests through the chain.

Since:
2024-09-15
Version:
3.0
Author:
Navid Mohaghegh

  • Constructor Details

    • DiscountApprovalService

      public DiscountApprovalService()
      Creates a new discount approval service with the default chain.

    • DiscountApprovalService

      public DiscountApprovalService(DiscountHandler chain)
      Creates a new discount approval service with a custom chain.
      Parameters:
      chain - the approval chain to use

  • Method Details

    • requestDiscount

      public DiscountRequest requestDiscount(Material material, double discountPercent, String customerId, String reason)
      Processes a discount request through the approval chain.
      Parameters:
      material - the material for which discount is requested
      discountPercent - the discount percentage (0.0 to 100.0)
      customerId - the customer requesting the discount
      reason - the reason for the discount request
      Returns:
      the processed discount request

    • calculateFinalPrice

      public double calculateFinalPrice(DiscountRequest request)
      Calculates the final price for an approved discount request.
      Parameters:
      request - the discount request
      Returns:
      the final price

    • getProcessedRequests

      public List<DiscountRequest> getProcessedRequests()
      Gets all processed discount requests.
      Returns:
      list of processed requests

    • getApprovedRequests

      public List<DiscountRequest> getApprovedRequests()
      Gets approved discount requests.
      Returns:
      list of approved requests

    • getRejectedRequests

      public List<DiscountRequest> getRejectedRequests()
      Gets rejected discount requests.
      Returns:
      list of rejected requests

    • getRequestsForCustomer

      public List<DiscountRequest> getRequestsForCustomer(String customerId)
      Gets discount requests for a specific customer.
      Parameters:
      customerId - the customer ID
      Returns:
      list of requests for the customer

    • getRequestsForMaterial

      public List<DiscountRequest> getRequestsForMaterial(Material material)
      Gets discount requests for a specific material.
      Parameters:
      material - the material
      Returns:
      list of requests for the material

    • getApprovalStats

      public DiscountApprovalService.ApprovalStats getApprovalStats()
      Gets approval statistics.
      Returns:
      approval statistics

    • clearRequests

      public void clearRequests()
      Clears all processed requests.

    • getChainInfo

      public String getChainInfo()
      Gets the approval chain information.
      Returns:
      chain information

    • toString

      public String toString()
      Overrides:
      toString in class Object