Thank you for answering.
I though about using a cache in last resort. I was firstly wondering if I could use the method UpdateRecipe.createPropertyData(Map<String,Object> myProperties) in witch I could pass the reference of my thumbnail file that I receive in GetChildrenHandler. After this, I would recuperate this information in the GetAssetHandler class using Item.getCustomParameters().get("thumbnailReference"). But I saw in the documentation that those custom parameters where used to be displayed in some dialog box in Bridge, so maybe it's not the good solution.
Is it then possible to add some additionnal informations about an asset in GetChildrenHandler (like my thumbnail reference) so it can be used later? Or do I obligatedly have to create a personal cache system in my plug-in?
(And just to be sure : it is then "only" in GetAssetsHandler that I can give the thumbnail datas to Drive?)
Something that could maybe reply to my question :
In the API, the method GetAssetsRequest.Item.getCustomParameters(), it says :
Retrieves the developer-defined parameters, if any.
Someone knows where to fill-in those customParameters? (Particulary if it is possible to fill it in an UpdateRecipe in GetChildrenHandler).
Thanks in advance.
One mistake in my previous answer, Please ignore it.
To enable thumbnails display in Br, first, you should set Capabiltiy.READ_XMP_META_DATA in you connector, then, you can provide thumbnail in GetChildrentHandler or in GetAssetsHandler, or other handlers, however during GetChildrenHandler call, Adobe Drive Core only requests basic data
hope it helps
Thanks to reply to my initial question.
But your first message was also relevant : it's true that It'd be heavy to load all the thumbnails in GetChildrenHandler. GetAssetsHandler will load the previews one by one as we need to load it.
I am then trying to save the thumbnail reference that I receive in GetChildrenHanlder into the asset recipe. Then I would like to retrieve this information (thumbnail reference) in the items of GetAssetsHandler passing by Item.getCustomParameters(), and to try to avoid to deal with the creation of a new cache that could make things just heavier.
Am I on the right path, or will I be forced to make an internal cache to pass this asset information from GetChildrenHandler to GetAssetsHandler?