private static IDictionary TryConvertDictionary(IDictionary value, ColumnDesc column, Type targetType)
{
if (targetType.GetTypeInfo().IsInstanceOfType(value))
{
return(value);
}
var mapColumnInfo = (MapColumnInfo)column.TypeInfo;
Type childTargetKeyType;
Type childTargetValueType;
if (!Utils.IsIDictionary(targetType, out childTargetKeyType, out childTargetValueType))
{
throw new InvalidCastException(string.Format("Unable to cast object of type '{0}' to type '{1}'",
value.GetType(), targetType));
}
var childTypes = value.GetType().GetTypeInfo().GetGenericArguments();
if (!childTargetKeyType.GetTypeInfo().IsAssignableFrom(childTypes[0]) ||
!childTargetValueType.GetTypeInfo().IsAssignableFrom(childTypes[1]))
{
// Convert to target type
var type = typeof(SortedDictionary <,>).MakeGenericType(childTargetKeyType, childTargetValueType);
var result = (IDictionary)Activator.CreateInstance(type);
foreach (DictionaryEntry entry in value)
{
result.Add(
TryConvertToType(entry.Key, new ColumnDesc
{
TypeCode = mapColumnInfo.KeyTypeCode,
TypeInfo = mapColumnInfo.KeyTypeInfo
}, childTargetKeyType),
TryConvertToType(entry.Value, new ColumnDesc
{
TypeCode = mapColumnInfo.ValueTypeCode,
TypeInfo = mapColumnInfo.ValueTypeInfo
}, childTargetValueType));
}
return(result);
}
return(value);
}