Example of proper handing error response in Spring Boot + Swagger while endpoint is producing "image/jpeg"

HandleImageWithSwaggerAndExceptionHandlerExamplesController.kt

// imports are here

@RestController
class ImageController {

    // This will work, but response content type can be improper.
    @GetMapping("/images_1/{id}")
    fun getImage1(@PathVariable id: UUID): ByteArray? {
        return // bytes of an image
    }
    
    // This will work in a happy path.
    //
    // But in unhappy path (for example when image is not found) you can see exception: 
    // org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
    //
    // At least when you are calling from Swagger
    // because it adds "-H 'accept: image/jpeg'" header to the request.
    //
    // The cause of the exception lies in @ExceptionHandler configiration.
    // It is very likely that error response is configured to return "application/json"
    // and Spring cannot handle this properly.
    @GetMapping("/images_2/{id}", produces = [MediaType.IMAGE_JPEG_VALUE])
    fun getImage2(@PathVariable id: UUID): ByteArray? {
        return // bytes of an image
    }
    
    // This will work in both cases and response content types will be correct.
    //
    // We are forcing swagger to add "-H 'accept: */*'" header instead.
    @GetMapping("/images_3/{id}", produces = [MediaType.IMAGE_JPEG_VALUE])
    @ApiResponse(
        responseCode = "200",
        description = "OK",
        content = [
            Content(
                schema = Schema(implementation = ByteArray::class),
                mediaType = MediaType.ALL_VALUE
            )
        ]
    )
    fun getImage3(@PathVariable id: UUID): ByteArray? {
        return // bytes of an image
    }
}