You have to save your model using Poseidon in XMI, or extract it from the .zuml file which is in fact a zip file:
xlstproc -o <argo-file>.xmi poseidon2argouml.xsl <poseidon-file>.xmi
Then in ArgoUML open the generated file.
The diagrams are not converted, you have to create them agein from the classes doing drag&drop.
When updating obecject model, think to update also the associated xsd to generate always a valid xml object model files.
The interest of the Transformers is to use less template syntax as possible to generate the final code. Nevertheless it is necessary to use this syntax for the methods body. Nuiton-processor interprets differently Transformers and Generators, it is necessary to add as Transformer's heading the following configuration :
/*{generator option: parentheses = false}*/
/*{generator option: writeString = +}*/
You then just need to use the balises /*{ }*/ to add the body of a method:
setOperationBody(setValue, ""
/*{
this.value = value;
}*/
);
It is advised to make tests for the output file page setting as well as for Generators results.
Waiting for tutorials and a demo version, the project you can find with the most of concrete examples on EUGene use is ToPIA . You can find in the source code (ToPIA-persistence module) lots of examples of Transformer and/or Generator for Java code generation (uses ObjectModelTransformerToJava or ObjectModelGenerator as superclass). You can also find some examples of integration tests of maven-eugene-plugin : directory src/it/smart-generate.