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.

Copy

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);
tmpFile.close();