public CompositeDataLoader(IDataLoader <TSource> loader, TransformerChain <TLastTransformer> transformerChain = null)
{
Contracts.CheckValue(loader, nameof(loader));
Contracts.CheckValueOrNull(transformerChain);
Loader = loader;
Transformer = transformerChain ?? new TransformerChain <TLastTransformer>();
}
internal TransformerChain<ITransformer> GetTransformer()
{
var result = new TransformerChain<ITransformer>();
foreach (var transform in _transforms)
{
if (transform.Transform is RowToRowMapperTransform mapper)
{
var transformer = mapper.GetTransformer();
result = result.Append(transformer);
}
else
{
ITransformer transformer = new TransformWrapper(_host, transform.Transform);
result = result.Append(transformer);
}
}
return result;
}