/// <summary>
/// Checks for a type converter (if one exists).
/// 1) Checks for a converter registered for the current columns data type.
/// 2) Checks to see if a converter is registered for all enums (type of Enum) if the current column is an enum.
/// 3) Checks to see if a converter is registered for all objects (type of Object).
/// </summary>
/// <param name="dataMap">The current data map.</param>
/// <returns>Returns an IConverter object or null if one does not exist.</returns>
internal IConverter GetConverter(Type dataType)
{
if (TypeConverters.ContainsKey(dataType))
{
// User registered type converter
return(TypeConverters[dataType]);
}
if (TypeConverters.ContainsKey(typeof(Enum)) && dataType.IsEnum)
{
// A converter is registered to handled enums
return(TypeConverters[typeof(Enum)]);
}
if (TypeConverters.ContainsKey(typeof(object)))
{
// User registered default converter
return(TypeConverters[typeof(object)]);
}
// No conversion
return(null);
}
private static void LoadTypeConverters(Assembly assem)
{
if (TypeConverters == null)
{
TypeConverters = new Dictionary <Type, IList <TypeConverter> >();
}
var tcType = typeof(TypeConverter);
var types = LoadedTypes[assem].Where(t => tcType.IsAssignableFrom(t) && t != tcType).ToList();
foreach (var t in types)
{
var tc = Activator.CreateInstance(t) as TypeConverter;
if (!TypeConverters.ContainsKey(tc.FromType))
{
TypeConverters.Add(tc.FromType, new List <TypeConverter>());
}
TypeConverters[tc.FromType].Add(tc);
}
}