Method PrepareForInitialization

catboost/libs/data/objects.cpp:182–213

}

void NCB::TCommonObjectsData::PrepareForInitialization(
    const TDataMetaInfo& metaInfo,
    ui32 objectCount,
    ui32 prevTailCount
) {
    FeaturesLayout = metaInfo.FeaturesLayout;
    if (prevTailCount == 0) {
        SetStoreStringColumns(metaInfo.StoreStringColumns);
    } else {
        SubgroupIds.SetStoreStringColumnsVal(metaInfo.StoreStringColumns);
        GroupIds.SetStoreStringColumnsVal(metaInfo.StoreStringColumns);
        StoreStringColumns = metaInfo.StoreStringColumns;
    }

    if (StoreStringColumns) {
        NCB::PrepareForInitialization(metaInfo.HasGroupId, objectCount, prevTailCount, &GroupIds.GetMaybeStringData());
        NCB::PrepareForInitialization(metaInfo.HasSubgroupIds, objectCount, prevTailCount, &SubgroupIds.GetMaybeStringData());
        NCB::PrepareForInitialization(metaInfo.HasSampleId, objectCount, prevTailCount, &SampleId);
    } else {
        NCB::PrepareForInitialization(metaInfo.HasGroupId, objectCount, prevTailCount, &GroupIds.GetMaybeNumData());
        NCB::PrepareForInitialization(metaInfo.HasSubgroupIds, objectCount, prevTailCount, &SubgroupIds.GetMaybeNumData());
    }
    NCB::PrepareForInitialization(metaInfo.HasTimestamp, objectCount, prevTailCount, &Timestamp);

    const size_t catFeatureCount = (size_t)metaInfo.FeaturesLayout->GetCatFeatureCount();
    if (catFeatureCount) {
        if (!CatFeaturesHashToString) {
            CatFeaturesHashToString = MakeAtomicShared<TVector<THashMap<ui32, TString>>>();
        }
        CatFeaturesHashToString->resize(catFeatureCount);
    }
}

void NCB::TCommonObjectsData::SetBuildersArrayRef(
    const TDataMetaInfo& metaInfo,