Vary ResponderId by Metadata Source

[Rod Widdowson]

> Am I going about this the right way?

I couldn't say but..

> I don't see how to practically determine the metadata group from which
> the EntityDescriptor came. Is that possible? 

Do you mean the EntitiesDescriptor?  Then yes - look at org.opensaml.saml.common.profile.logic.EntityGroupNamePredicate

If you mean according to which metadata provider it came from I am pretty sure that the answer is "not out of the can". 

You might/could/should be able to arrange a metadata filter which added some objectMetadata to each entity (with the precise metadata depending on the MetadataProvider).  Then you could look for that objectMetadata when you got your entity.

/Rod