protected override IEnumerable <Export> GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)
{
List <Export> exports = new List <Export>();
ImportDefinition queryImport = TranslateImport(definition);
if (queryImport == null)
{
return(exports);
}
// go through the catalogs and see if there's anything there of interest
foreach (CompositionScopeDefinition childCatalog in _scopeDefinition.Children)
{
foreach (var partDefinitionAndExportDefinition in childCatalog.GetExportsFromPublicSurface(queryImport))
{
// We found a match in the child catalog. Now we need to check that it doesn't get rejected.
// if the rejetecion is enabled and atomic composition is present, we will actually have to do the work, if not - we just use what we have
bool isChildPartRejected = false;
if (_catalogExportProvider.EnsureRejection(atomicComposition))
{
using (var container = CreateChildContainer(childCatalog))
{
// We create a nested AtomicComposition() because the container will be Disposed and
// the RevertActions need to operate before we Dispose the child container
using (var localAtomicComposition = new AtomicComposition(atomicComposition))
{
isChildPartRejected = container.CatalogExportProvider.DetermineRejection(partDefinitionAndExportDefinition.Item1, localAtomicComposition);
}
}
}
// If the child part has not been rejected, we will add it to the result set.
if (!isChildPartRejected)
{
exports.Add(CreateScopeExport(childCatalog, partDefinitionAndExportDefinition.Item1, partDefinitionAndExportDefinition.Item2));
}
}
}
return(exports);
}
