createTmpFile()

Function that creates a file with a unique name in the temporary work folder and returns a file object. This file stores data temporarily in memory or in a buffer. It is used to prevent multiple input/output access to a physical file when writing. In the end, the contents are transferred to a physical file for which only a single input/output access will occur.

In the following script, the contents of the data sample file are copied in uppercase to a temporary file.

try{
	// Open a reader
	var reader = openTextReader(data.filename);
	// Create a temporary file
	var tmpFile = createTmpFile();
	// Open a writer on the temporary file
	var writer = openTextWriter(tmpFile.getPath());
	try{
		var line = null; // Current line
		/* read line by line and readLine will return null at the end of the file */
		while( (line = reader.readLine()) != null ){
			// Edit the line
			line = line.toUpperCase();
			// Write the result in the temporary file
			writer.write(line);
			// add a new line
			writer.newLine();
		}
	}
	finally{
		// Close the writer of the temporary file
		writer.close();
	}
}
finally{
	// Close the reader
	reader.close();
}
deleteFile(data.filename);
tmpFile.move(data.filename);