URI as a schema implementation is resolving to null

[paradoxcat]

When using annotations on our resource method the following Operation annotation will produce a null schema:

@Operation(responses = {
                    @ApiResponse(responseCode = "200", description = "OK", content = @Content(schema = @Schema(implementation = URI.class))),
                    @ApiResponse(responseCode = "400", description = "Bad Request"),
                    @ApiResponse(responseCode = "500", description = "Internal Server Error")
            })

 "post" : {
        "operationId" : "exampleOperation",
        "responses" : {
          "200" : {
            "description" : "OK",
            "content" : {
              "application/json" : {
                "schema" : {
                  "$ref" : "#/components/schemas/null"
                }
              }
            }
          },
          "400" : {
            "description" : "Bad Request"
          },
          "500" : {
            "description" : "Internal Server Error"
          }
        }
      }

I believe that "java.net.URI.class" is dealt with explicitly by "io.swagger.v3.core.util.PrimitiveType" and we are having similar issues with other classes mentioned there including "java.net.URL" and "java.util.UUID".

[frantuma]

Thanks for reporting this; #3017 (available in latest 2.0.6-SNAPSHOT on sonatype) fixes it by correctly resolving to string schema with uri format; it also allows to provide a set of classes not to be considered primitive in case this is needed for some reason (in this case URI would be resolved as a non system POJO); please see related test for its usage.

In 2.0.5 version you can instead workaround that by providing the schema your self:

@Operation(responses = {
                    @ApiResponse(responseCode = "200", description = "OK", content = @Content(schema = @Schema(type = "string", format = "uri"))),
                    @ApiResponse(responseCode = "400", description = "Bad Request"),
                    @ApiResponse(responseCode = "500", description = "Internal Server Error")
            })

Closing ticket, please reopen if still experiencing issues