private IEnumerable <ITypeMappingItem> ToTypeMappingItems(string trimmedContextWithoutHeader)
{
var stringBuilder = new StringBuilder();
TypeMappingItem currentTypeMappingItem = null;
var isInSourceContext = false;
var isInDestinationContext = false;
foreach (var currentChar in trimmedContextWithoutHeader)
{
stringBuilder.Append(currentChar);
var currentString = stringBuilder.ToString();
if (currentString.EndsWith(sourceTypeStartContext) && currentTypeMappingItem == null && !isInSourceContext)
{
currentTypeMappingItem = new TypeMappingItem();
isInSourceContext = true;
stringBuilder.Clear();
}
if (currentString.EndsWith(sourceTypeEndContext) && currentTypeMappingItem != null && isInSourceContext)
{
currentTypeMappingItem.SourceType = currentString.Substring(0, currentString.Length - sourceTypeEndContext.Length);
isInSourceContext = false;
stringBuilder.Clear();
}
if (currentString.EndsWith(sourceDestinationSeparator) &&
currentTypeMappingItem != null && !isInSourceContext && !isInDestinationContext)
{
if (!String.IsNullOrWhiteSpace(currentString.Substring(0, currentString.Length - sourceDestinationSeparator.Length)))
{
throw new Exception("Formatting errors");
}
stringBuilder.Clear();
}
if (currentString.EndsWith(destinationTypeStartContext) &&
currentTypeMappingItem != null && !isInSourceContext && !isInDestinationContext)
{
if (!String.IsNullOrWhiteSpace(currentString.Substring(0, currentString.Length - destinationTypeStartContext.Length)))
{
throw new Exception("Formatting errors");
}
isInDestinationContext = true;
stringBuilder.Clear();
}
if (currentString.EndsWith(destinationTypeEndContext) &&
currentTypeMappingItem != null && !isInSourceContext && isInDestinationContext)
{
currentTypeMappingItem.DestinationType = currentString.Substring(0, currentString.Length - destinationTypeEndContext.Length);
isInDestinationContext = false;
yield return(currentTypeMappingItem);
currentTypeMappingItem = null;
stringBuilder.Clear();
}
}
}
private TypeMappingItem ToTypeMappingItem(string itemAsString)
{
var splitted = Regex.Split(itemAsString, "\\)<-\\]\\s*=>\\s*\\[->\\(").ToList();
var sourceType = splitted[0].TrimStart().Substring("[->(".Length);
var destinationType = splitted[1].TrimEnd();
if (destinationType.EndsWith(","))
{
destinationType = destinationType.Substring(0, destinationType.Length - 1);
}
destinationType = destinationType.TrimEnd().Substring(0, destinationType.Length - ")<-]".Length);
var result = new TypeMappingItem()
{
SourceType = sourceType, DestinationType = destinationType
};
return(result);
}