public CompositionScopingService(ComposablePartCatalog allParts, Action <CompositionBatch> explicitExports, IEnumerable <string> possibleScopes)
{
//Contract.Requires( allParts != null );
//Contract.Requires( explicitExports != null );
//Contract.Requires( possibleScopes != null );
//Contract.Requires( possibleScopes.Any() );
var rootCatalog = allParts.OutOfScope(possibleScopes);
_explicitExports = new ComposablePartExportProvider();
_rootContainer = new CompositionContainer(rootCatalog, CompositionOptions.DisableSilentRejection, _explicitExports);
_explicitExports.SourceProvider = _rootContainer;
var b = new CompositionBatch();
explicitExports(b);
b.AddExportedValue(RootScope);
b.AddExportedValue(this as ICompositionScopingService);
_explicitExports.Compose(b);
_scopeCatalogs = possibleScopes.ToDictionary(s => s, s => allParts.Scope(s));
}
public static ComposablePartCatalog Scope(this ComposablePartCatalog catalog, params string[] scopeIds)
{
////Contract.Requires( catalog != null );
////Contract.Requires( scopeIds != null );
return(catalog.Scope((IEnumerable <string>)scopeIds));
}