After Mantle

CBCosmDatastream.m

@implementation CBCosmDatastream

#pragma mark - Mantle

+ (NSDictionary *)externalRepresentationKeyPathsByPropertyKey
{
   return [super.externalRepresentationKeyPathsByPropertyKey mtl_dictionaryByAddingEntriesFromDictionary:@{
           @"datastreamId": @"id",
           @"updated": @"at",
           @"value": @"current_value",
           @"minValue": @"min_value",
           @"maxValue": @"max_value"
           }];
}

#pragma mark - KVC

- (void)setValue:(id)value forKey:(NSString*)key
{
   if ([key isEqualToString:@"datapoints"])
   {
      if ([value isKindOfClass:[NSArray class]])
      {
         NSArray* values = (NSArray*)value;
         NSMutableArray* datapoints = [NSMutableArray arrayWithCapacity:[values count]];
         
         for (NSDictionary* attributes in values)
         {
            CBCosmDatapoint* datapoint = [[CBCosmDatapoint alloc] initWithAttributes:attributes];
            [datapoints addObject:datapoint];
         }
         
         _datapoints = datapoints;
      }
   }
}

@end