The Metadata Adapter interface features the
customizeUpdate method for this purpose.
The customization is driven only by the user name, not by local session properties, as the aim of the feature is to allow sending of user-specific data.
As long as the desired formatting depends on the user identity and not on session related formatting preferences, you can take advantage of this method.
Alternatively, you can differentiate the flow for different clients by assigning them different items.
Also in this case, the choice can be done entirely on the server side; the various clients can ask for the same item name and the Metadata Adapter can divert the requests to different items in
getItems.
In this case, session related information is also available.
