I want to transform an unmarshalled json as a java to java transformation. The primitive fields like Integer and String works. But I need to transform a list into a map and I want to do it with a converter like described in the guide, but I can't select Add transformation or Add custom Transformation in the mapping drop down menu. They are always lightgrey disabled.
I followed the Fuse Transformation Tooling guide and use eclipse photon and I installed the Jboss tools via the market place. I use the version Red Hat Fuse Tooling Version: 11.0.0.v20180614-0309
there is no support for custom converters in Fuse Tooling :-(.
Add transformation # build-in transformation functions
Add custom transformation # custom transformation functions
These options are used for modification of formatting of particular values (for example: String -> String, apply add brackets custom transformation => String -> "[" + String + "]". For more details see GETTING STARTED WITH DATA TRANSFORMATION documentation.
You should be able to use Fuse Tooling Data Transformation tool to create an initial mapping between "primitive" fields and that directly modify src/main/resources/transformation.xml file and apply Dozer Custom Converters (see Dozer - Custom Type Converters)