On 13/04/2012 09:08, Vincenz Mössenböck wrote:
private Set<BestellpositionDTO> alBestellpositionDTO;

One of the first advices I got for making DTOs is to avoid using interfaces in 
them.
GWT will try and generate JavaScript for all the interface implementations it can find in the classpath, which is rather costly, and can fail if it finds a non-serializable implementation...
In short, use HashSet or similar instead of Set.

--
Philippe Lhoste
--  (near) Paris -- France
--  http://Phi.Lho.free.fr
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