Re-evaluate/refactor KiePMML AST factories ------------------------------------------ Key: DROOLS-5272 URL: https://issues.redhat.com/browse/DROOLS-5272 Project: Drools Issue Type: Task Reporter: Gabriele Cardosi Assignee: Gabriele Cardosi Priority: Major Labels: TrustyAI Re-evaluate implementation of KiePMML AST factories in the view of the mining model specifications. Reevaluate usage of fieldTypeMap - types.   E.g.: inside  DroolsModelProvider.getKiePMMLDroolsASTCommon the  Map<String, KiePMMLOriginalTypeGeneratedType> fieldTypeMap is populated invoking  addTransformationsDerivedFields. Then, a  List<KiePMMLDroolsType> is created out of this map. Later the same map is also populated by  KiePMMLDataDictionaryASTFactory.factory(fieldTypeMap).declareTypes(dataDictionary). and the List<KiePMMLDroolsType> retrieved by the latter are added to the one created before. That means it is not needed to have KiePMMLDerivedFieldASTFactory and KiePMMLDataDictionaryASTFactory returning List<KiePMMLDroolsType> - they can simply instantiate and return a Map<String, KiePMMLOriginalTypeGeneratedType>; the maps may be merged together, and the List<KiePMMLDroolsType> may be created out of that (merged) map. So 1) KiePMMLDataDictionaryASTFactory and KiePMMLDerivedFieldASTFactory should return only a newly instantiated Map<String, KiePMMLOriginalTypeGeneratedType> 2) inside DroolsModelProvider.getKiePMMLDroolsASTCommon those maps should be merged  3) List<KiePMMLDroolsType> should be created out of the merged map  4) merged map and  List<KiePMMLDroolsType> should be propagated as parameters