private static CompositionResult <IEnumerable <Export> > TryGetExports(ExportProvider provider,
ComposablePart part, ImportDefinition definition, AtomicComposition atomicComposition)
{
try
{
var exports = provider.GetExports(definition, atomicComposition).AsArray();
return(new CompositionResult <IEnumerable <Export> >(exports));
}
catch (ImportCardinalityMismatchException ex)
{
// Either not enough or too many exports that match the definition
CompositionException exception = new CompositionException(ErrorBuilder.CreateImportCardinalityMismatch(ex, definition));
return(new CompositionResult <IEnumerable <Export> >(
ErrorBuilder.CreatePartCannotSetImport(part, definition, exception)));
}
}
public CompositionResult TrySetImport(ImportDefinition import, Export[] exports)
{
try
{
Part.SetImport(import, exports);
UpdateDisposableDependencies(import, exports);
return(CompositionResult.SucceededResult);
}
catch (CompositionException ex)
{ // Pulling on one of the exports failed
return(new CompositionResult(
ErrorBuilder.CreatePartCannotSetImport(Part, import, ex)));
}
catch (ComposablePartException ex)
{ // Type mismatch between export and import
return(new CompositionResult(
ErrorBuilder.CreatePartCannotSetImport(Part, import, ex)));
}
}
