hi! Looking for Groovy help 🙂 In #C056RQB10LU we have a function with one optional argument, which is imported to pipelines and used as

validateParameters()

or

validateParameters('custom_nextflow_schema.json')

@Function
    void validateParameters(
        String schemaFilename = 'nextflow_schema.json'
    ) { ... }

Now we need to add optional named arguments, so we used a Map for that

@Function
    void validateParameters(
        Map options = null,
        String schemaFilename
    ) { ... }

But when using this function without any arguments (

validateParameters()

) we see this error

ERROR ~ Could not find which method validateParameters() to invoke from this list:
  public void nextflow.validation.SchemaValidator#validateParameters(java.lang.String)
  public void nextflow.validation.SchemaValidator#validateParameters(java.util.Map, java.lang.String)

Is there a better way to code that?

Maybe add the

schemaFilename

as an option in the

options

map? since that parameter isn't mandatory for the execution of the function?

I haven’t considered that because this will break the current implementation for pipelines that are passing a schema path like

validateParameters('custom_nextflow_schema.json')

but you are right, maybe that’s our best option

Yes, indeed 😕

yea usually for stuff like this, I use the "config object" method, which is basically like your map implementation, but instead of using a generic map, create an actual Class definition for the config for the function, then add your optional args as attributes to it, then pass it in to the function. Its cleaner because a Class instance will always have the exact attributes expected, but a map could have any or none of the expected attributes and is subject to type-safety risks too

Wow, thank you for this! That seems like a really good idea for this!

Thanks for the info @steve! will definitely try this out 😄