/// <summary>
/// Sets up the batch provider for the specified recipe
/// </summary>
/// <param name="recipe">The recipe the provider must evaluate</param>
/// <param name="isMain">Indicates whether this is the top level collection,
/// otherwise a sub collection of a heterogeneous collection</param>
/// <param name="source">The source that requested evaluated of the recipe</param>
/// <param name="batchSize">The batch size</param>
private Task SetupBatchProviderFor(FeatureCollectionRecipe recipe, bool isMain = true, object source = null, int batchSize = -1)
{
// Get the default batch size happening
if (batchSize == -1)
{
batchSize = this.BatchSize;
}
// Set up the batch provider for the specified recipe
BatchProvider = new FeatureCollectionBatchProvider(_featureCollectionRecipe, this.BatchSize)
{
// The source that activated this evaluation
Source = source,
// Indicates whether this is a top-level collection or a sub collection
// of a heterogeneous collection
IsMain = isMain,
// Set the logger of the batch provider
Logger = Logger
};
// Return the task that takes care of refreshing the current batch
// This can be awaited by the consumer
return(BatchProvider.RefreshCurrentBatch());
}
/// <summary>
/// Setup the contents of this list view using the specified collection.
/// The specified source is the viewModel that originated the display of the collection.
/// </summary>
private Task SetupForCollection(FeatureCollection collection, object source, bool isMain = true)
{
_featureCollection = collection;
_featureCollectionRecipe = _featureCollection != null ? _featureCollection.CollectionRecipe : null;
if (!SettingFeatureCollectionFromHistoryOrSub && _featureCollection != null)
{
this.History.Add(_featureCollection);
}
// Only handle recipes that actually have a result table descriptor
if (_featureCollectionRecipe == null)
{
// There is no spoon - do nothing, though we could choose to empty things
// GridViewModel.FeatureCollection = null;
}
else
{
// Do batch wise
return(SetupBatchProviderFor(_featureCollectionRecipe, isMain, source));
}
// Return a simple task (use the Boolean generic task subclass - these are automatically cached and reused)
return(TaskEx.FromResult(true));
}