/// <summary>
/// Overloaded Constructor that iterates through a floor string and creates corresponding Elevator objects
/// </summary>
/// <param name="flr">pass in a string representing the floor</param>
/// <param name="floorNumber">indicates the floor number</param>
/// <param name="floorState">indicates the state or T Value that the floor belongs to in the Elevator System</param>
public Floor(string flr, int floorNumber, int floorState)
{
floor = new ArrayList();
if (flr != null)
{
foreach (char c in flr)
{
Elevator elevator = new Elevator(c, floorNumber,floorState);
this.floor.Add(elevator);
}
}
}
/// <summary>
/// Call this method to find out where a current elevator will be in the next State
/// </summary>
/// <param name="currentElevator"></param>
/// <returns></returns>
private Elevator FindNextElevator(Elevator currentElevator)
{
int nextStateOfCurrentElevator = currentElevator.floorState + 1;
Elevator elevator = null;
if (currentElevator != null && nextStateOfCurrentElevator <= ElevatorProgram.FinalTime)
{
//Get a list of all floors at the current state
Hashtable allFloorsAtCurrentState = (Hashtable)ElevatorStates[nextStateOfCurrentElevator];
foreach (Floor f in allFloorsAtCurrentState.Values)
{
//Return the Elevator object as soon as you find it in the Current State
elevator = f.IsElevatorOnFloor(currentElevator.elevatorName);
if (elevator != null)
{
break;
}
}
}
return(elevator);
}
/// <summary>
/// Call this method to see if the current elevator is on the Final Floor at time T
/// </summary>
/// <param name="currentElevatorNode"></param>
/// <returns></returns>
private bool IsCurrentElevatorAFinalNode(Elevator currentElevatorNode)
{
if (currentElevatorNode.floorState == ElevatorProgram.FinalTime &&
currentElevatorNode.elevatorFloorNumber == ElevatorProgram.FinalFloor)
{
return true;
}
else
{
return false;
}
}
/// <summary>
/// Recursive method to find all possible paths that the Starting Elevator can take until time T.
/// </summary>
/// <param name="parentNode"></param>
/// <param name="currentElevator"></param>
private void GetChildren(TreeNode parentNode, Elevator currentElevator)
{
Elevator nextElevator = null;
//Get a list of all Elevators in the Current State
ArrayList allElevatorsOnFloor = FindAllElevatorsForCurrentState(currentElevator);
try
{
if (currentElevator.floorState <= ElevatorProgram.FinalTime)
{
foreach (Elevator elevator in allElevatorsOnFloor)
{
//Create a tree node object for all Elevators in the Current State
TreeNode Node = new TreeNode(elevator.elevatorName.ToString());
Node.Tag = elevator;
parentNode.Nodes.Add(Node);
//Find the next State of the current Elevator and call this method recursively
//to find all of its Child Nodes or possible path until time T
nextElevator = FindNextElevator(elevator);
if (nextElevator != null)
{
GetChildren(Node, nextElevator);
}
}
}
}
catch (Exception)
{
}
}
/// <summary>
/// Call this method to find out where a current elevator will be in the next State
/// </summary>
/// <param name="currentElevator"></param>
/// <returns></returns>
private Elevator FindNextElevator(Elevator currentElevator)
{
int nextStateOfCurrentElevator = currentElevator.floorState + 1;
Elevator elevator = null;
if (currentElevator != null && nextStateOfCurrentElevator <= ElevatorProgram.FinalTime)
{
//Get a list of all floors at the current state
Hashtable allFloorsAtCurrentState = (Hashtable)ElevatorStates[nextStateOfCurrentElevator];
foreach (Floor f in allFloorsAtCurrentState.Values)
{
//Return the Elevator object as soon as you find it in the Current State
elevator = f.IsElevatorOnFloor(currentElevator.elevatorName);
if (elevator != null)
{
break;
}
}
}
return elevator;
}
/// <summary>
/// Call this method to obtain a list of all Elevators in the Current State
/// </summary>
/// <param name="currentElevator"></param>
/// <returns></returns>
private ArrayList FindAllElevatorsForCurrentState(Elevator currentElevator)
{
//Get all Floors at State 1
Hashtable allFloorsAtCurrentState = (Hashtable)ElevatorStates[currentElevator.floorState];
ArrayList allElevatorsOnFloor = null;
Floor currentFloor = null;
foreach (Floor f in allFloorsAtCurrentState.Values)
{
//Find out which floor that the current elevator is on
if (f.IsElevatorOnFloor(currentElevator.elevatorName) != null)
{
currentFloor = f;
break;
}
}
if (currentFloor != null)
{
//Get a list of all Elevators on the floor
allElevatorsOnFloor = currentFloor.GetAllElevatorsOnFloor();
}
return allElevatorsOnFloor;
}