HI Jens,

Thanks for your help. I don't understand this sentence " *Also if you do 
not transfer RequirementImpl directly but instead an interface that 
RequirementImpl implements, then GWT Compiler needs to see the class+source 
of RequirementImpl so it can treat RequirementImpl as a possible concrete 
type that might be transferred. " *What do you understand?
I had also read stuff on whiteList but I don't understand what means this 
WhiteList? Do you know this?

Regards
Antonio

Le mercredi 26 août 2020 à 09:29:33 UTC+2, Jens a écrit :

> RequirementImpl must implement serializable, needs to have a default 
> constructor (visibility does not matter), no final fields and there must be 
> at least one serializable type found for each field that can be assigned to 
> that field (which must meet the same requirements). Also if you do not 
> transfer RequirementImpl directly but instead an interface that 
> RequirementImpl implements, then GWT Compiler needs to see the class+source 
> of RequirementImpl so it can treat RequirementImpl as a possible concrete 
> type that might be transferred. 
>
> Have you double checked these requirements? 
>
> -- J.
>
>
> Am Dienstag, 25. August 2020 17:11:53 UTC+2 schrieb Guillen Antonio:
>>
>> HI all,
>>
>> I use GWT 2.81 and EMF (Eclipse Modeling Framework) when i want send from 
>> the server to the client an object of my model, I obtain this final error:
>> com.google.gwt.user.client.rpc.SerializationException: Type 
>> 'com.lacen.organisation.impl.RequirementImpl' was not included in the set 
>> of types which can be serialized by this SerializationPolicy or its Class 
>> object could not be loaded. For security purposes, this type will not be 
>> serialized.: instance = 
>> com.lacen.organisation.impl.RequirementImpl@2fa144e7 (name: Fkygrdphgf)
>>
>> I have tried to understand how to use serializationWhitelist but I have 
>> no clear example.  The class RequirementImpl contains List, so I tried to 
>> create ArrayList with the good type, but same pb.
>>
>> Can you help me, at least give me where found a claer explanation. 
>>
>> Tanks a lot 
>> Antonio Guillen
>>
>

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