ITrafficSource Interface

public interface ITrafficSource : IGenericTrafficSource

Public Interface ITrafficSource
	Inherits IGenericTrafficSource

class MyTrafficSource : ITrafficSource {
   private DateTime createdTime;
   private Dictionary<string, int> speeds;


   //Constructor
   public MyTrafficSource(string src) {
          speeds = new Dictionary<string, int>();

          // Populate speeds with traffic information from "src"
          LoadTrafficFile(src);
   }

   // Fill in createdTime and speeds based on the contents of src.
   private void LoadTrafficFile(string src) {    
           // Set createdTime from a timestamp contained within src    
           createdTime = ...    

           // Scan through remainder of src, populating speeds as we go.
           ...
   }

   //ITrafficSource members
   public TrafficInfo GetTrafficInfo(string tmc, DateTime time) {
          return GetTrafficInfo(tmc, time, null);
   }

   //Get TrafficInfo for the specified TMC code and time
   public TrafficInfo GetTrafficInfo(string tmc, DateTime time, Telogis.GeoBase.TimeZone? timezone) {
      int speed;

      if (timezone != null) {
          time = ((Telogis.GeoBase.TimeZone)timezone).ConvertTime(time);
      }

      //Check if data is still valid  
      if (createdTime.AddMinutes(15) < time) {
          return null;
      }

      if (speeds.TryGetValue(tmc, out speed)) {
          return new TrafficInfo(speed);
      }

      return null;
   }

   public DateTime CreatedTime {
      get { return createdTime; }
   }
}