vCloud API - How to get only public catalogs or only organisation catalogs?

Hello,

I want to get the public or the private catalogs from an organisation.

There is a method (getCatalogRefs() from class com.vmware.vcloud.sdk.Organisation) that gives all the catalogs.

Is there a way to find out which catalogs are public and which are private?

Or is there a method to get all the public catalogs form a specific vCloud Director?

Thanks,

Octavian