[jira] [Created] (GERONIMO-6722) The AnnotationProcessor should inject media type instead of response code (when endpoint returns void or Response)

["Andriy Redko (JIRA)" <ji...@apache.org>]

Andriy Redko created GERONIMO-6722:
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             Summary: The AnnotationProcessor should inject media type instead of response code (when endpoint returns void or Response)
                 Key: GERONIMO-6722
                 URL: https://issues.apache.org/jira/browse/GERONIMO-6722
             Project: Geronimo
          Issue Type: Improvement
      Security Level: public (Regular issues)
            Reporter: Andriy Redko
         Attachments: after.png, before.png, before.png, before.png

The Problem
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Under certain conditions, for example when endpoint returns `void` or generic `Response`, the `AnnotationProcessor` does not properly inject the media type (which could be omitted or explicitly provided using `@Produces` JAX-RS annotation). Here is an example (using Swagger UI here as it is easier to spot the issue visually, the underlying JSON / YAML spec has the same data):

 

Whereas the expected media type should be compatible with [https://tools.ietf.org/html/rfc6838] ([https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.0.md#mediaTypes]). The expected behavior is to set media type to `*/*` (if not provided):

![after]([https://user-images.githubusercontent.com/509855/56208657-a4fff000-601f-11e9-8346-78c35468ca83.png])

Or pick the value from `@Produces` annotation.



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