OpenAPITools / OpenAPITools/openapi-generator

Allow ReturnType to return Generics

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#21,398 1 comment 0 reactions 0 assignees View on GitHub

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Enhancement: Feature
Dominant language
Java
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Description

Is your feature request related to a problem? Please describe.

I'd like to be able to change type mappings to return generics. So for example:

typeMapping.put("file", "Response<ByteString>");

However despite my {{{returnType}}} in the template we get: ResponseLessThanByteStringGreaterThan

Describe the solution you'd like

It would be great if {{{returnType}}} allowed generics

Describe alternatives you've considered

We currently do a manual work around and and use a kotlin typealias to fix this

Additional context

Waddyathink @wing328 @guiarn

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Research direction

Start with modules/openapi-generator/src/main/resources/kotlin-misk/apiAction.mustache, especially the returnType usage around line 58, and trace how the typeMapping value reaches that template. Confirm that a mapping such as Response is emitted with generic syntax rather than ResponseLessThanByteStringGreaterThan, while preserving existing return types.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, kotlin
Domain
api, tooling
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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