public String readFromFile(String fileName)
{
try
{
StreamReader sr = new StreamReader(fileName);
String line;
String[] tokens;
Repository.Stack <Student> newStack = new Repository.Stack <Student>();
while ((line = sr.ReadLine()) != null)
{
tokens = line.Split(new String[] { " " }, StringSplitOptions.None);
//System.Console.Out.WriteLine(tokens[0] + "\n" + tokens[1] + "\n" + tokens[2]);
if ("Student".Equals(tokens[0]))
{
newStack.push(new Student(Convert.ToInt32(tokens[1]), tokens[2], Convert.ToInt32(tokens[3])));
}
else if ("UndergraduateStudent".Equals(tokens[0]))
{
newStack.push(new UndergraduateStudent(Convert.ToInt32(tokens[1]), tokens[2], Convert.ToInt32(tokens[3]), Convert.ToInt32(tokens[4])));
}
else if ("GraduateStudent".Equals(tokens[0]))
{
newStack.push(new GraduateStudent(Convert.ToInt32(tokens[1]), tokens[2], Convert.ToInt32(tokens[3]), tokens[4], Convert.ToInt32(tokens[5]), Convert.ToInt32(tokens[6])));
}
else if ("PhDStudent".Equals(tokens[0]))
{
newStack.push(new PhDStudent(Convert.ToInt32(tokens[1]), tokens[2], Convert.ToInt32(tokens[3]), tokens[4], tokens[5], Convert.ToInt32(tokens[6])));
}
else
{
throw new MyException("Error reading from file!");
}
}
this.repo.replaceContent(newStack);
}
catch (MyException ex)
{
return(ex.getMessage());
}
catch (IOException)
{
return("Error reading from file!");
}
catch (FormatException)
{
return("Invalid format in file!");
}
return("Students read from file successfully!");
}
public static void moveElements <W, T>(Repository.Stack <W> source, Repository.Stack <T> destination) where W : T
{
Repository.Stack <T> temp = new Repository.Stack <T>();
try
{
while (!source.isEmpty())
{
temp.push(source.pop());
}
while (!temp.isEmpty())
{
destination.push(temp.pop());
}
}
catch (MyException e)
{
System.Console.WriteLine(e.getMessage());
}
}