Add projections

[fbiville]

The idea would be to (ideally) declaratively map specific attributes from feed and entries to a client POJO.

Any simpler alternative is welcome.

[malk]

Please do develop the Idea a little further, what kind of mapping do you have in mind?

[fbiville]

Introduce mapping like:

class Product {
   @Projection("/feed/title")
   String name;

   @Projection("/feed/entry[type=PRODUCT]/id")
   Integer id;
}

Easiest would be to convert as follows:
XML -> Feed (atom-jaxb core) -> Product (client class, mapped via atom-jaxb mapping)

Best would be to avoid deserializing the whole feed whenever possible.