public ArrayList loadTransactions(String nameOfDataFileWithinDataDirectory)
{
   ArrayList transactions = new ArrayList();
   String[] lines = loadStrings(nameOfDataFileWithinDataDirectory);

   for (int i = 0; i < lines.length; i++)
   {
     transactions.add(parseTransaction(lines[i]));
   }
  return transactions;
}


// This function returns all the files in a directory as an array of File objects
// This is useful if you want more info about the file
public File[] listFiles(String dir) {
  File file = new File(dir);
  if (file.isDirectory()) {
    File[] files = file.listFiles();
    return files;
  } 
  else {
    // If it's not a directory
    return null;
  }
}

//create a new transaction obejct from a comma separated line.
public Transaction parseTransaction(String line)
{
  String sections[] = split(line, ",");

  Transaction t = new Transaction();

  //store all fields
//  t.itemNumber = sections[0];
//  t.bibNumber = sections[1];
  t.ckodate = sections[0];
  t.ckotime = sections[1];
//  t.ckidate = sections[4];
//  t.ckitime = sections[5];
//  t.collcode = sections[6];
  t.itemtype = sections[2];
//  t.barcode = sections[8];
  t.title = sections[3];
//  t.callNumber = sections[10];
//  t.deweyClass = sections[3];

  return t;
}