fairy code

public Map<ItemDataStorageType, List<Integer>> getByInterval(String operator, int from, int toExclusive) {
        final HourMapper mapper = new HourMapper(from, toExclusive);
        Map<ItemDataStorageType, List<Integer>> result = StatsHelper.initLeadsMap(ItemDataStorageType.class, mapper.getSize(), 0);

        Iterable<StorageTypeCounts> dataList = storageTypeCountsRepository.findByInterval(operator, from, toExclusive);

        for (StorageTypeCounts storageTypeCounts : dataList) {
            for (Map.Entry<ItemDataStorageType, Integer> entry : storageTypeCounts.getCounts().entrySet()) {
                result.get(entry.getKey())
                        .set(mapper.getIndex(storageTypeCounts.getHour()), entry.getValue());
            }
        }

        return result;
    }