5.5

FileUtil

FileUtil class provides utility methods for working with files in your application. It includes methods for reading, creating, and managing files.

Methods

readFile(filePath: String): File

Reads the content of a file located at the specified filePath and returns a File object representing the file.

  • Parameters:

    • filePath (String): The path to the file to be read.

  • Returns:

    • File: A File object representing the read file.

// Read a file
var filePath = "path/to/your/file.txt";
var file = FileUtil.readFile(filePath);

readInputStream(inputStream: InputStream, relativeIterationPath: String): File

Reads the content of an input stream and creates a File object. The relativeIterationPath is used to determine the file path for the created File object.

  • Parameters:

    • inputStream (InputStream): The input stream to read.

    • relativeIterationPath (String): The relative path for the created File object.

  • Returns:

    • File: A File object representing the read content.

var inputStream = ...; // Your input stream source

// Relative path for the created File object
var relativeIterationPath = "output/sample.txt";

// Call the method to read the input stream and create a File object
var file = FileUtil.readInputStream(inputStream, relativeIterationPath);

// Now, you can work with the created File object
// For example, you can check the file's absolute path
var absolutePath = file.getAbsolutePath();
return "Absolute Path: " + absolutePath;

createFile(filePath: String, content: String): File

Creates a new file at the specified filePath with the provided content.

  • Parameters:

    • filePath (String): The path for the new file.

    • content (String): The content to be written to the file.

  • Returns:

    • File: A File object representing the newly created file.

// Create a file
var newFilePath = "path/to/newfile.txt";
var fileContent = "This is the content of the new file.";
var newFile = FileUtil.createFile(newFilePath, fileContent);

createTempFile(fileName: String, content: String): File

Creates a temporary file with the specified fileName and writes the provided content to it.

  • Parameters:

    • fileName (String): The name for the temporary file.

    • content (String): The content to be written to the file.

  • Returns:

    • File: A File object representing the created temporary file.

// Create a temp file
var newFilePath = "path/to/newfile.txt";
var fileContent = "This is the content of the new file.";
var newFile = FileUtil.createTempFile(newFilePath, fileContent);

readFileContent(fileName: String): String

Reads the content of a file with the specified fileName and returns it as a string.

  • Parameters:

    • fileName (String): The name of the file to read.

  • Returns:

    • String: The content of the file as a string.

// Read file content
var fileToRead = "path/to/your/anotherfile.txt";
var fileContent = FileUtil.readFileContent(fileToRead);
return "File Content: " + fileContent;

Examples

Logging Data to a File:

// Logging business operation
var logFilePath = "logs/business_log.txt";
var logMessage = "User John Doe performed a critical operation.";

// Create or append to the log file
var logFile = FileUtil.createFile(logFilePath, logMessage);

// Log the operation details for auditing purposes
return "Operation logged: " + logFile.getAbsolutePath();

Generating Reports:

// Generating a business report
var reportName = "Q3_Sales_Report.pdf";
var reportData = "Quarterly sales report data...";

// Create a temporary report file
var tempReport = FileUtil.createTempFile(reportName, reportData);

// In a real scenario, you might generate a PDF report and save it temporarily
// Provide a download link to the user for the report
return "Report generated: " + tempReport.getAbsolutePath();

Reading Customer Data:

// Reading customer data from a file
var customerFile = "customer_profiles/customer123.txt";

// Read the customer data
var customerData = FileUtil.readFileContent(customerFile);

// Process and display customer information in your application
return "Customer Data:\n" + customerData;

Data Backup and Recovery:

// Creating a backup of important data
var dataFilePath = "data/important_data.csv";
var dataToBackup = FileUtil.readFileContent(dataFilePath);

// Create a backup file with a timestamp
var backupFileName = "data_backup_" + System.currentTimeMillis() + ".csv";
var backupFile = FileUtil.createFile("backups/" + backupFileName, dataToBackup);

// Create a backup of important data for disaster recovery
return "Data backup created: " + backupFile.getAbsolutePath();
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