Hi Martin, you just need to write a ProcessParameterIO that can encode objects of type List into some format of your choice.
The main issue I see is that list is pretty generic, the actual content of the list is what of needs encoding, so I'd suggest to create first a ListOfFoo extends List<Foo> type, and then build a ProcessParameterIO that can specifically encode ListOfFoo into something (XML, JSON, whatever). Cheers Andrea On Mon, Nov 21, 2016 at 10:49 AM, MARTIN, FANNY <[email protected]> wrote: > Dear all, > > I would like to have lists as a result of a WPS process. In the > GeoserverProcess interface implementation, I have described it as the > following: > > @DescribeResults({ > @DescribeResult(name = *"**output1**"*, description = *"**output > list 1**"*, type=List.*class*, meta = { *"mimeTypes=text/xml" *}), > @DescribeResult(name = *"**output2**"*, description = *"**output > list 2**"*, type=List.*class*, meta = { *"mimeTypes=text/xml" *}) > }) > *public *Map<String, Object> execute ….. > > However, I get an error with the output list type : Blacklisting process > …… as the output …… of type interface java.util.List cannot be handled. > > I notice that I get a similar error for a predefined process into > Geoserver : Blacklisting process ras:RasterZonalStatistics2 as the output > zonal statistics of type interface java.util.List cannot be handled > > After looking on the internet, I don’t find any information about this > error, then any help welcome. > I am using Geoserver 2.8.1 Tomcat installation. Is the list output type > handled by this version ? If so, what is the correct way to define a > process handling list as outputs ? > Otherwise, what is the best way to handle lists as output: definition of > PPIO for java.util.List type ? Custom results type ? > > Thanks in advance, > Fanny > > > Ce message et toutes les pièces jointes (ci-après le "message") sont > établis à l’intention exclusive des destinataires désignés. Il contient des > informations confidentielles et pouvant être protégé par le secret > professionnel. Si vous recevez ce message par erreur, merci d'en avertir > immédiatement l'expéditeur et de détruire le message. Toute utilisation de > ce message non conforme à sa destination, toute diffusion ou toute > publication, totale ou partielle, est interdite, sauf autorisation expresse > de l’émetteur. L'internet ne garantissant pas l'intégrité de ce message > lors de son acheminement, Atos (et ses filiales) décline(nt) toute > responsabilité au titre de son contenu. 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