/// <summary>
/// Prints out a single action string
/// </summary>
/// <param name="actionString">Action String to print out</param>
/// <param name="finalState">Specifies the Final Time or State in the Elevator System</param>
public static void PrintValidActionString(string actionString, int finalState)
{
//Check if the Action String is valid before printing
if (BuildingUtilityClass.IsValidActionString(actionString, finalState))
{
Console.WriteLine(actionString);
}
else
{
Console.Error.WriteLine("No Solution");
}
}
/// <summary>
/// Prints out all action strings in the ValidActionStringsList Collection
/// </summary>
/// <param name="validActionStringsList">Specifies a Collection of valid action strings</param>
/// <param name="finalState">Specifies the Final Time or State in the Elevator System</param>
public static void PrintValidActionStrings(ArrayList validActionStringsList, int finalState)
{
if (validActionStringsList.Count == 0)
{
throw new Exception("No Solution");
}
foreach (string actionString in validActionStringsList)
{
//Check if the Action String is valid before printing
if (BuildingUtilityClass.IsValidActionString(actionString, finalState))
{
Console.WriteLine(actionString);
}
else
{
Console.Error.WriteLine("No Solution");
}
}
}
/// <summary>
/// Recursive method to build action string
/// </summary>
/// <param name="treeNode">Current Node to check in the Tree</param>
private void FindActionPathToFinalFloorAtFinalState(TreeNode treeNode)
{
foreach (TreeNode tn in treeNode.Nodes)
{
//Get the current elevator object specified by the current node in the tree
Elevator currentElevatorNode = (Elevator)tn.Tag;
//If the current elevator doesnt belongs to the Final Floor at State T,
//continue to search the tree
if (!IsCurrentElevatorAFinalNode(currentElevatorNode))
{
FindActionPathToFinalFloorAtFinalState(tn);
}
else
{
//If the current elevator does belong to the Final foor at State T,
//create an Action string by retrieving all Parent Node values
TreeNode currentNode = tn.Parent;
string actionString = String.Empty;
while (currentNode.Text != "RootNode")
{
actionString += currentNode.Text;
currentNode = currentNode.Parent;
}
//Reverse the ActionString since it was build from Final Node to Root Node
actionString = BuildingUtilityClass.ReverseString(actionString);
//Add the action string to an ActionString list of valid actions
if (!ActionStringList.Contains(actionString))
{
if (actionString != String.Empty)
{
ActionStringList.Add(actionString);
}
}
}
}
}
//Main Entry Point of the Elevator System Console Application
static void Main(string[] args)
{
try
{
ArrayList validActionStringsList = new ArrayList();
ParseCommandLineArgs(args);
//The Command to Invoke the Program must be called InvokeProgram
if (InvokeProgramCommand.Equals("InvokeProgram"))
{
/*Create an object encasulating elevator states representative of the
* correctly formatted Input File*/
ElevatorState elevatorStateCollection = new ElevatorState(ElevatorSystemFilePath);
//Get a list of valid action strings
validActionStringsList = elevatorStateCollection.FindValidActionStrings(StartingElevator, FinalFloor, FinalTime);
/*If there were valid action strings that were found print them out
* Otherwise, throw an exception since no input matched the Command Line arguments*/
if (validActionStringsList != null)
{
BuildingUtilityClass.PrintValidActionStrings(validActionStringsList, FinalTime);
}
else
{
throw new Exception("No Solution");
}
}
else
{
throw new Exception("No Solution");
}
}
catch (Exception ex)
{
//If there is no solution, print out "No Solution" to stderr or Console.Error and nothing to Console.WriteLine
Console.Error.WriteLine("No Solution");
}
}
