V2 Example Serialization - SMILEY4/ktor-openapi-tools GitHub Wiki

json-serialization (for examples) is the conversion from any value (of a given type kotlin.reflect.KType) to a json-string. This behavior can be customized, overwritten or completely replaced in the plugin-config encoding-section.

This project uses jackson as the default json-serializer. The configuration of the object-mapper can be customized freely via the "EncodingData".

EncodingData.DEFAULT_EXAMPLE_OBJECT_MAPPER = jacksonObjectMapper()
    .setSerializationInclusion(JsonInclude.Include.NON_NULL)

The default json-serializer can be completely replaced by another one in the plugin-config encoding-section.

install(SwaggerUI) {
    encoding {
	    exampleEncoder { type, value ->
            // convert 'value' to json and return as string
	}
    }
}

• exampleEncoder - converts the given value (of the specified type type) to a valid json-string

It is also possible to only replace the serializer for specific types.

exampleEncoder { type, value ->
    when (type) {
        getSchemaType<String>() -> value.toString()  // custom "serializer" for strings
        else -> EncodingData.encodeExample(value) // use default serializer for everything else
    }
}

An example replacing jackson with kotlinx can be found here.