public override CompositeActivator RewriteActivator(
TypeInfo partType,
CompositeActivator activatorBody,
IDictionary <string, object> partMetadata,
IEnumerable <CompositionDependency> dependencies)
{
if (!ContractHelpers.IsShared(partMetadata))
{
return(activatorBody);
}
object sharingBoundaryMetadata;
if (!partMetadata.TryGetValue(SharingBoundaryPartMetadataName, out sharingBoundaryMetadata))
{
sharingBoundaryMetadata = null;
}
var sharingBoundary = (string)sharingBoundaryMetadata;
var sharingKey = LifetimeContext.AllocateSharingId();
return((c, o) =>
{
var scope = c.FindContextWithin(sharingBoundary);
if (object.ReferenceEquals(scope, c))
{
return scope.GetOrCreate(sharingKey, o, activatorBody);
}
else
{
return CompositionOperation.Run(scope, (c1, o1) => c1.GetOrCreate(sharingKey, o1, activatorBody));
}
});
}
