Hello, it’s still me. Small question I can’t seem ...

# getting-started

[dierre]

Hello, it’s still me. Small question I can’t seem to solve by myself. I’ve put in a project which is used as a parent by another maven project this extension function:

fun RestClientBuilder.withKotlinSupport(): RestClientBuilder {
    KotlinRestClientFactoryConfigurer.configure(this)
    return this
}

Now this class just adds the KotlinModule for Jackson. The problem is that if I build my RestClient with the RestClientBuilder on the child project, there is no way I can see withKotlinSupport. Could you tell me a way to identify which is the problem?

[karelpeeters]

Of course the parent project can't see stuff in the child project, that how it's supposed to work. Maybe you can write a method in the parent project along the lines of setBuildConfigurator(configurator: (Builder) -> Unit).

[dierre]

mmm…it’s the exact opposite. I can’t see it from child project.

[karelpeeters]

withKotlinSupport is part of the child project, right?

[dierre]

no, the extension you see is part of the parent

[dierre]

I want to use it on the children

[dierre]

but I cannot see it

[karelpeeters]

Did you import the file that contains the extension?

[dierre]

what do you mean?

[karelpeeters]

Well when you want to use an extension function from another file you have to actually import that file, as the extension doesn't actually "belong" the the receiver type.

[dierre]

that I didn’t do

[dierre]

wait

[dierre]

@karelpeeters sorry I cannot find on google a way to import the file, can you tell me how to do it?

[karelpeeters]

Just do import package.FileName like always.

[dierre]

ahahhh ok 😄

[dierre]

The file is called namespace.kt, the content is this:

package com.lastminute.appfw.libs.rest

import com.lastminute.appfw.extensions.KotlinRestClientFactoryConfigurer
import org.springframework.core.ParameterizedTypeReference

fun RestClientBuilder.withKotlinSupport(): RestClientBuilder {
    KotlinRestClientFactoryConfigurer.configure(this)
    return this
}

inline fun <reified T: Any> typeRef(): ParameterizedTypeReference<T> = object: ParameterizedTypeReference<T>(){}

but it’s I can’t find a way to import it.

[karelpeeters]

import com.lastminute.appfw.libs.rest.namespace doesn't work?

[dierre]

it says unresolved reference on namespace

[karelpeeters]

And namespace.kt and the file you're trying to use it in are in the same project?

[dierre]

nope. namespace.kt is on parent, the file where I want to use it is on child project.

[karelpeeters]

Do you also get this error if you build he entire project with Maven? Maybe Idea hasn't realized something has changed.

[dierre]

the very same error 😞

[dierre]

should I put the extension inside an object?

[karelpeeters]

No it should really work like this.

[karelpeeters]

Maybe try asking in #general or #maven, I'm out of ideas 😞

[karelpeeters]

Other stuff is accessible in the child project, right?

[dierre]

well, nope. Nada de nada.

[karelpeeters]

Well then your problem is maven, not extension functions. I've never actually used maven myself, so I can't really help there.

[dierre]

I’m doing research

[dierre]

it was a maven problem after all

[dierre]

thank you very much

[karelpeeters]

No problem, and glad to hear you managed to fix it!