From 09a053f891c27d27247f0c922e94869af35224c1 Mon Sep 17 00:00:00 2001 From: Arefe Talebi Date: Thu, 21 May 2026 18:33:27 +0330 Subject: [PATCH] HW6 --- src/main/java/Main.java | 17 ++- src/main/java/ReportGenerator.java | 133 ++++++++++-------- .../main/resources/2025_order_details.csv | 0 3 files changed, 84 insertions(+), 66 deletions(-) rename 2025_order_details.csv => src/main/resources/2025_order_details.csv (100%) diff --git a/src/main/java/Main.java b/src/main/java/Main.java index 148a46e..398f37f 100644 --- a/src/main/java/Main.java +++ b/src/main/java/Main.java @@ -16,14 +16,17 @@ public class Main { Scanner scanner = new Scanner(input); // TODO: - // - Read each line from products.csv - // - For each line, parse productId, name, and price - // - The format of the file is like this: - // [productId],[name],[price] - // - Store Product objects in the productCatalog ArrayList - // NOTE - // - The data in products.csv is guaranteed to be valid. + while (scanner.hasNextLine()) { + String line = scanner.nextLine(); + String[] parts = line.split(","); + int productId = Integer.parseInt(parts[0]); + String name = parts[1]; + double price = Double.parseDouble(parts[2]); + Product product = new Product(productId, name, price); + productCatalog.add(product); + + } } public static void main(String[] args) diff --git a/src/main/java/ReportGenerator.java b/src/main/java/ReportGenerator.java index 8eb458b..121c4b7 100644 --- a/src/main/java/ReportGenerator.java +++ b/src/main/java/ReportGenerator.java @@ -1,5 +1,12 @@ import java.util.List; +import java.io.*; +import java.util.Scanner; +import java.io.IOException; +import java.io.FileWriter; +import java.io.InputStream; +import java.util.List; + public class ReportGenerator { private final String ordersFilePath; @@ -15,69 +22,77 @@ public class ReportGenerator { this.productList = productList; } - public void processFile() - { + public void processFile() { // TODO: - // 1. Open the order details CSV file - // 2. Read the file line by line - // 3. Split each line using comma delimiter - // (each line is guaranteed to contain exactly two commas) - // 4. Each line contains exactly 3 values in the format: - // [productId],[quantity],[discountPercent] - // 5. Attempt to convert values: - // - productId -> int - // - quantity -> int - // - discountPercent -> int - // NOTE: - // - quantity and discountPercent may contain invalid characters - // (e.g., letters instead of numbers). - // - If parsing any value fails (NumberFormatException), - // the entire line must be considered invalid. - // - Use try-catch blocks and exception handling to safely - // handle parsing and validation errors without stopping - // the processing of the remaining lines. - // 6. Validate parsed values: - // - productId must be greater than 0 - // - quantity must be greater than 0 - // - discountPercent must be between 0 and 99 inclusive - // 7. Look for a Product in productList that matches productId - // 8. If no Product with that ID exists in the catalog, - // the entire line is considered invalid - // 9. If all values are valid and the product exists, calculate: - // subtotal = quantity * product price - // discountValue = subtotal * discountPercent / 100 - // finalCost = subtotal - discountValue - // 10. Update report totals: - // - totalQuantity += quantity - // - totalFinalCost += finalCost - // - totalDiscountValue += discountValue - // 11. If any parsing error, validation failure, or missing product occurs: - // - increment totalInvalidLines - // - skip the line and continue processing the next line - // 12. Close all file resources - } + InputStream input = ReportGenerator.class + .getClassLoader() + .getResourceAsStream(ordersFilePath); + if (input == null) { + System.out.println("Order file not found"); + return; + } + Scanner scanner = new Scanner(input); + while (scanner.hasNextLine()) { + String line = scanner.nextLine(); + try { + String[] parts = line.split(","); + int productId = Integer.parseInt(parts[0]); + int quantity = Integer.parseInt(parts[1]); + int discountPercent = Integer.parseInt(parts[2]); + if (productId <= 0 || + quantity <= 0 || + discountPercent < 0 || + discountPercent > 99) { + + totalInvalidLines++; + continue; + } + Product foundProduct = null; + int i = 0; + while (i < productList.size()) { + Product product = productList.get(i); + if (product.getProductID() == productId) { + foundProduct = product; + break; + } + i++; + } + + if (foundProduct == null) { + totalInvalidLines++; + continue; + } + double subtotal = quantity * foundProduct.getPrice(); + double discountValue = subtotal * discountPercent / 100.0; + double finalCost = subtotal - discountValue; + totalQuantity += quantity; + totalFinalCost += finalCost; + totalDiscountValue += discountValue; + } catch (NumberFormatException e) { + totalInvalidLines++; + + } + } + + scanner.close(); + } public void saveReport() { // TODO: - // 1. Build a formatted report string - // 2. Include: - // - total quantity - // - total final cost - // - total discount value - // - total invalid lines - // 3. Create/open output report file (name it report.txt) - // 4. Write report string into file - // 5. Handle file writing exceptions - // 6. Close writer resources - - /* Example Structure - ========= SALES REPORT ========= - Total Quantity Sold: 42 - Total Final Cost: $1520.75 - Total Discount Value: $230.50 - Invalid Rows: 3 - ================================ - */ + String report = + "======= SALES REPORT ========\n" + + "Total Quantity Sold: " + totalQuantity + "\n" + + "Total Final Cost: $" + totalFinalCost + "\n" + + "Total Discount Value: $" + totalDiscountValue + "\n" + + "Invalid Rows: " + totalInvalidLines + "\n" + + "================"; + try { + FileWriter writer = new FileWriter("report.txt"); + writer.write(report); + writer.close(); + } catch (IOException e) { + System.out.println("Error writing report file"); + } } } \ No newline at end of file diff --git a/2025_order_details.csv b/src/main/resources/2025_order_details.csv similarity index 100% rename from 2025_order_details.csv rename to src/main/resources/2025_order_details.csv