create fruit shop #1229

jekaGr · 2024-10-31T13:54:14Z

No description provided.

mateacademy-ai-mentor

Thank you for your hard work on this project! While your code meets many of the task requirements, there are a few critical issues that need to be addressed before we can approve the pull request:

Error Handling: Throwing RuntimeException for various operations (unsupported operations, insufficient stock, IOException, etc.) can lead to abrupt application termination. Consider using custom exceptions or handling errors more gracefully to provide better feedback to users.
Null Checks: Ensure that methods like operationStrategy.get(transaction.getOperation()) and getOperationFromCode handle potential null values or invalid inputs to prevent NullPointerException or application crashes.
Input Validation: Add validation checks for input data, such as ensuring the correct number of elements in arrays and handling NumberFormatException for parsing integers. This will help avoid runtime exceptions due to malformed input.
Thread Safety: If your service is intended for a multi-threaded environment, consider using thread-safe collections like ConcurrentHashMap.
File Handling: Ensure file paths are correct and files exist before reading to avoid runtime errors. Add error handling for file operations.
Clarify Comments: The comment suggesting the removal of the main class could be confusing. Clarify its purpose or remove it if not applicable.

Addressing these issues will significantly improve the robustness and user experience of your application. Keep up the great work, and I'm confident you'll nail it with these adjustments! 😊

✨ Please rate this review in the Platform's notification center. I will be grateful for your feedback! ✨

🔄 Fix the issues, commit the changes, and then re-request my review using the Re-request review button in the Reviewers tab.

mateacademy-ai-mentor · 2024-10-31T13:57:29Z

src/main/java/core/basesyntax/Main.java

+import java.util.Map;
+
+/**
+ * Feel free to remove this class and create your own.


The comment suggests removing this class, which might be confusing if this is intended to be the main entry point of the application. Consider clarifying the purpose of this comment or removing it if it's not applicable.

mateacademy-ai-mentor · 2024-10-31T13:57:29Z

src/main/java/core/basesyntax/Main.java

+        List<String> inputReport = fileReader.read(
+                "src/main/java/core/basesyntax/reportToRead.csv");


Ensure that the file path is correct and that the file exists to avoid runtime errors. Consider adding error handling for file reading operations.

mateacademy-ai-mentor · 2024-10-31T13:57:29Z

src/main/java/core/basesyntax/Main.java

+
+        // 4. Process the incoming transactions with applicable OperationHandler implementations
+        DataConverter dataConverter = new DataConverterImpl();
+        List<FruitTransaction> transactions = dataConverter.convertToTransaction(inputReport);


Ensure that the convertToTransaction method correctly handles any potential formatting issues in the input data to avoid runtime exceptions.

mateacademy-ai-mentor · 2024-10-31T13:57:29Z

src/main/java/core/basesyntax/file/DataConverterImpl.java

+            if (line.startsWith("type")) {
+                continue;
+            }
+            String[] parts = line.split(",");


Consider adding validation to check if the parts array has the expected number of elements before accessing them. This will prevent ArrayIndexOutOfBoundsException if the input data is malformed.

mateacademy-ai-mentor · 2024-10-31T13:57:29Z

src/main/java/core/basesyntax/file/DataConverterImpl.java

+            String[] parts = line.split(",");
+            String operationCode = parts[0];
+            String fruit = parts[1];
+            int quantity = Integer.parseInt(parts[2]);


Add error handling for Integer.parseInt(parts[2]) to catch NumberFormatException in case the quantity is not a valid integer.

mateacademy-ai-mentor · 2024-10-31T13:57:30Z

src/main/java/core/basesyntax/strategy/OperationStrategyImpl.java

+
+    @Override
+    public OperationHandler get(FruitTransaction.Operation operation) {
+        return handlerMap.get(operation);


The get method may return null if the operation is not found in the handlerMap. Consider adding a check to handle this case, possibly by throwing an exception or returning a default handler, to avoid potential NullPointerException in the calling code.

mateacademy-ai-mentor · 2024-10-31T13:57:30Z

src/main/java/core/basesyntax/strategy/PurchaseOperation.java

+        int currentQuantity = shopService.getQuantity(fruit);
+        if (transaction.getOperation() == FruitTransaction.Operation.PURCHASE) {
+            if (transactionQuantity > currentQuantity) {
+                throw new RuntimeException("Not enough " + fruit + " in stock for purchase");


Throwing a RuntimeException for insufficient stock might not be the best approach as it can terminate the application abruptly. Consider using a custom exception or handling the error more gracefully to provide better feedback to the user.

mateacademy-ai-mentor · 2024-10-31T13:57:30Z

src/main/java/core/basesyntax/strategy/PurchaseOperation.java

+            }
+            shopService.addFruits(fruit, currentQuantity - transactionQuantity);
+        } else {
+            throw new RuntimeException("Unsupported operation for PurchaseHandler");


Throwing a RuntimeException for unsupported operations might not be the best approach. Consider using a custom exception or handling the error more gracefully to provide better feedback to the user.

mateacademy-ai-mentor · 2024-10-31T13:57:30Z

src/main/java/core/basesyntax/strategy/ReturnOperation.java

+            int quantity = transaction.getQuantity();
+            shopService.addFruits(fruit, quantity);
+        } else {
+            throw new RuntimeException("Unsupported operation for ReturnHandler");


Throwing a RuntimeException for unsupported operations might not be the best approach as it can terminate the application abruptly. Consider using a custom exception or handling the error more gracefully to provide better feedback to the user.

mateacademy-ai-mentor · 2024-10-31T13:57:31Z

src/main/java/core/basesyntax/strategy/SupplyOperation.java

+            int quantity = transaction.getQuantity();
+            shopService.addFruits(fruit, quantity);
+        } else {
+            throw new RuntimeException("Unsupported operation for SupplyHandler");


Throwing a RuntimeException for unsupported operations might not be the best approach as it can terminate the application abruptly. Consider using a custom exception or handling the error more gracefully to provide better feedback to the user.

mateacademy-ai-mentor

Great job on your submission! 🎉 While there are a few areas that need improvement, your code is on the right track. Here are some key points to consider:

File Paths: Ensure that the file paths are correct and that you have the necessary permissions to read from and write to these locations. Verify the paths for both reportToRead.csv and finalReport.csv.
Data Conversion: It appears that the step to convert incoming data into FruitTransaction objects is missing. Make sure to implement this using the DataConverter instance.
Error Handling: Consider adding error handling for parsing integers to manage cases where the quantity is not a valid integer. This will prevent crashes due to malformed input data.
Exception Messages: When throwing exceptions, provide more context in the error message to aid in debugging, such as the line number or content.
SOLID Principles: Review your code to ensure it adheres to SOLID principles, particularly the Dependency Inversion Principle, to improve maintainability.

These improvements will enhance the functionality and robustness of your code. Keep up the good work, and continue to learn and grow from these experiences! 🚀

✨ Please rate this review in the Platform's notification center. I will be grateful for your feedback! ✨

mateacademy-ai-mentor · 2024-10-31T14:10:29Z

src/main/java/core/basesyntax/Main.java

+        List<String> inputReport = fileReader.read(
+                "src/main/java/core/basesyntax/reportToRead.csv");
+
+        // 2. Convert the incoming data into FruitTransactions list


It seems like the step to convert the incoming data into a list of FruitTransaction objects is missing. Ensure that you implement this step using the DataConverter instance.

mateacademy-ai-mentor · 2024-10-31T14:10:29Z

src/main/java/core/basesyntax/Main.java

+        List<String> inputReport = fileReader.read(
+                "src/main/java/core/basesyntax/reportToRead.csv");


Verify that the file path 'src/main/java/core/basesyntax/reportToRead.csv' is correct and that the file exists at this location. Otherwise, the FileReader may throw an error.

mateacademy-ai-mentor · 2024-10-31T14:10:29Z

src/main/java/core/basesyntax/Main.java

+
+        // 6. Write the received report into the destination file
+        FileWriter fileWriter = new FileWriterImpl();
+        fileWriter.write(resultingReport, "src/main/java/core/basesyntax/finalReport.csv");


Verify that the file path 'src/main/java/core/basesyntax/finalReport.csv' is correct and that you have write permissions to this location. Otherwise, the FileWriter may throw an error.

mateacademy-ai-mentor · 2024-10-31T14:10:29Z

src/main/java/core/basesyntax/file/DataConverterImpl.java

+            String[] parts = line.split(",");
+            String operationCode = parts[0];
+            String fruit = parts[1];
+            int quantity = Integer.parseInt(parts[2]);


Consider adding error handling for Integer.parseInt(parts[2]) to manage cases where the quantity is not a valid integer. This will prevent the application from crashing due to malformed input data.

mateacademy-ai-mentor · 2024-10-31T14:10:29Z

src/main/java/core/basesyntax/file/DataConverterImpl.java

+                return operation;
+            }
+        }
+        throw new IllegalArgumentException("Invalid operation code: " + code);


Throwing an IllegalArgumentException is appropriate here, but consider providing more context in the error message, such as the line number or content, to aid in debugging.

create fruit shop

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mateacademy-ai-mentor suggested changes Oct 31, 2024

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fixed

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jekaGr requested a review from mateacademy-ai-mentor October 31, 2024 14:07

mateacademy-ai-mentor approved these changes Oct 31, 2024

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create fruit shop #1229

create fruit shop #1229

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		List<String> inputReport = fileReader.read(
		"src/main/java/core/basesyntax/reportToRead.csv");

create fruit shop #1229

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create fruit shop #1229

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