public static bool GetFromTabDelimitedPairFile(string path, out List <GisFromToPair> pairList, out string explanation)
{
explanation = "";
pairList = new List <GisFromToPair>();
if (!File.Exists(path))
{
explanation = $"File={path} does not exist.";
return(false);
}
try
{
string[] lines = File.ReadAllLines(path);
int nn = 0;
foreach (string line in lines)
{
string[] tokens = line.Split('\t');
if (tokens.Length != 3)
{
explanation = $"Line={nn} Text={line}. Expected 3 tokens, found={tokens.Length}";
return(false);
}
GisLocation fromLoc = GisLocation.ParseFromString(tokens[1], out explanation);
if (fromLoc == null)
{
explanation = $"Line={nn}. Cannot Parse Origin={tokens[1]}";
return(false);
}
GisLocation toLoc = GisLocation.ParseFromString(tokens[2], out explanation);
if (toLoc == null)
{
explanation = $"Line={nn}. Cannot Parse Destination={tokens[2]}";
return(false);
}
GisFromToPair pair = new GisFromToPair(fromLoc, toLoc);
if (pair == null)
{
explanation = $"Line={nn}. Text={line}. Cannot Create Pair.";
return(false);
}
pairList.Add(pair);
nn++;
}
return(true);
}
catch (Exception ex)
{
explanation = $"Path={path} Err={ex.Message}";
return(false);
}
}
public static bool CreatePairedData(List <GisLocation> locationList, int count, out List <GisFromToPair> pairList, out string explanation)
{
explanation = "";
pairList = null;
if (locationList == null || !locationList.Any())
{
explanation = $"LocationList is empty.";
return(false);
}
int nn = locationList.Count;
int maxCount = nn * nn - nn;
if (count > maxCount)
{
explanation = $"Count={count} exceed maximum={maxCount}";
return(false);
}
try
{
Random rnd = new Random();
Dictionary <int, GisFromToPair> pairDict = new Dictionary <int, GisFromToPair>();
while (pairDict.Count < count)
{
int iiFrom = rnd.Next(0, locationList.Count);
int iiTo = -1;
do
{
iiTo = rnd.Next(0, locationList.Count);
} while (iiTo == iiFrom);
GisFromToPair pair = new GisFromToPair(locationList[iiFrom], locationList[iiTo]);
if (!pairDict.ContainsKey(pair.Key))
{
pairDict.Add(pair.Key, pair);
}
}
pairList = pairDict.Values.ToList();
return(true);
}
catch (Exception ex)
{
explanation = $" Err={ex.Message}";
return(false);
}
}
