private static object ConvertCollection(Type type, ITypeCache typeCache, object itemValue)
{
var elementType = type.IsArray
? type.GetElementType()
: typeCache.IsGeneric(type) && typeCache.GetGenericTypeArguments(type).Length == 1
? typeCache.GetGenericTypeArguments(type)[0]
: null;
if (elementType == null)
{
return(null);
}
var count = GetCollectionCount(itemValue);
var arrayValue = Array.CreateInstance(elementType, count);
count = 0;
foreach (var item in (itemValue as System.Collections.IEnumerable))
{
arrayValue.SetValue(ConvertSingle(elementType, typeCache, item), count++);
}
if (type.IsArray || typeCache.IsTypeAssignableFrom(type, arrayValue.GetType()))
{
return(arrayValue);
}
else
{
var collectionTypes = new []
{
typeof(IList <>).MakeGenericType(elementType),
typeof(IEnumerable <>).MakeGenericType(elementType)
};
var collectionType = type.GetConstructor(new [] { collectionTypes[0] }) != null
? collectionTypes[0]
: collectionTypes[1];
var activator = _collectionActivators.GetOrAdd(new Tuple <Type, Type>(type, collectionType), t => type.CreateActivator(collectionType));
return(activator?.Invoke(arrayValue));
}
}
