Hi Johannes, did you try to call the constructor defined in UnnamedStreamPipesEntity (just call the empty contructor with super() in all constructors of DataLakeMeasure)?
Dominik -----Original Message----- From: Johannes Tex <[email protected]> Sent: Friday, March 6, 2020 2:00 PM To: [email protected] Subject: [Help wanted] Jslod Serialization Hello everyone, the REST endpoint for receiving the information about the stored data in the data lake ("../datalake/info") is currently serializing the class 'DataLakeMeasure' (org.apache.streampipes.rest.impl.datalake.DataLakeMeasure) in JSON, but it should be JSONLD. I tried to change the serialization, but it does not work. I always get the error: "No identifier was found for [org.apache.streampipes.model.datalake.DataLakeMeasure@3165a907]! The instance should implement Identifiable, have one or more properties annotated with @RdfId, or have an id function provided to the mapper.". The 'DataLakeMeasure' extends the 'UnnamedStreamPipesEntity' (org.apache.streampipes.model.base.UnnamedStreamPipesEntity), which has a propertety annotated with @RdfId. Someone has an idea, what could be the problem? See Branch [STREAMPIPES-79] Regards Johannes
