[Bug]: TCGC, lroMetadata.finalResponse.resultPath is neither clientName nor serializedName

[weidongxu-microsoft]

Describe the bug

TCGC 0.49.1

lroMetadata.finalResponse.resultPath is neither clientName nor serializedName

Reproduction

https://cadlplayground.z22.web.core.windows.net/cadl-azure/?c=aW1wb3J0ICJAdHlwZXNwZWMvcmVzdCI7CskZYXp1cmUtdG9vbHMvyCUtxhVjb3Jl3ytjLWNsaWVudC1nZW5lcmF0b3LINgp1c2luZyBUeXBlU3BlYy5IdHRwO9AVUmVzdNEVVmVyc2lvbmluZ8gbQcR5LkNvcmXSEi5UcmFpdHPPGeUAlUfoAJTHOwpAc2VydmljZSh7CiAgdGl0bGU6ICJSZXNwb25zZSIsCn0pCkB2xn5lZChBcGnnAItzKQpuYW1lc3BhY2UgVHNwVGVzdOQAvMU4OwoKZW51bSDLLyDEYEB1c2VEZXBlbmRlbmN5KGdsb2JhbC7rALnILi52MV8wX1ByZXZpZXdfMikKICB2MjAyMl8wNl8wMV9wxhk6ICLEFS0wNi0wMS3HFeQAtAoKb3AgQ3VzdG9tTG9uZ1J1buQBO09w5AD7aW9uPAogIFRQYXJhbXMgZXh0ZW5kc%2BwBgGZsZWPEJy5Nb2RlbCzELegA2d8vZGVsCj4gaXMgRm91bmTFbHMu1HfEVUFjY2VwdGVkyVwm5QEkICBAcG9sbGluZ0xvY8U4xhVoZWFkZXIoIslPLcggIuQBHyAgb8gZyBg6IFJlc291cmNlyBI86QDJPjsKICB9Cj7kAgJyxyYoIsgKcyIpCm3kAM7JQuYBv3Zpc2liaWxpdHnELGFkxXppZDogc3Ry5QKcxCVrZXnZLOQCM80uZGVzY3JpcOQAnT%2FKGSAg5ANMyhB9CgovLyBubyDkAKJ1bHQiIHBy5ADvdHnnAKfpARVEZXRhaWznAm5kb2PrATAgSUTlAIT5AKEsICJjcmVhdGXpANd1dWlk5QCnc3RhdHVzOuwDZPUB41N0YXRl5ADAZXJyb3I%2F2TFFxB%2FFWkBscm9S5QDVxA3mBDpOYW1lKCJs6gK6xiHmAL5lbmNvZGVkxiRhcHBsaeYB3C9qc29u5ADEbHJvX%2BcBJ8Qxxgs%2F6gIN5QFPQPoEFS7mAIXlBBHmAbDpBBDGLyLkAr7nBDc68QP85gQz5QF7yBMiKQpAcm91dGUoIuQFbMgUaW50ZXJm5ARAyClPcCB75QEVyC5scm8t6wDMbHJvSW52YWxp5AM1dWx05ANr%2FgPnIOcDVCAgQGJvZHkgcmVxdWVzdOwBDsQdfeQA0yDxAkcKICA%2B5AEv&e=%40azure-tools%2Ftypespec-client-generator-core&options=%7B%7D

input

  @lroResult
  @clientName("longRunningResult")
  @encodedName("application/json", "lro_result")
  result?: Resource;

output

                - apiVersions:
                    - 2022-06-01-preview
                  type: *a4
                  name: longRunningResult
                  isGeneratedName: false
                  optional: true
                  isApiVersionParam: false
                  onClient: false
                  crossLanguageDefinitionId: TspTest.Response.OperationDetails.result
                  decorators: []
                  kind: property
                  discriminator: false
                  serializedName: lro_result
                  isMultipartFileInput: false
                  flatten: false

            result: *a4
            resultPath: result

The resultPath should be the client name of the property longRunningResult.

Checklist

• Follow our Code of Conduct
• Check that this issue is about the Azure libraries for typespec. For bug in the typespec language or core libraries file it in the TypeSpec repo
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• The provided reproduction is a minimal reproducible example of the bug.

[weidongxu-microsoft]

For Java emitter, serializedName would be easier to handle, in the case of LRO, as well as in the case of pageable.

sdkMethod.response.resultPath;
sdkMethod.nextLinkPath;

as we usually parsing these via JSON.

Alternatively, TCGC can directly ref to the property (or array of properties, if there is nested in case of pageable).

[ArcturusZhang]

I think the only way we could deal it gracefully is to make an array of SdkModelProperty.
Making everything to be strings and put "what this string means" in document for people to read is not quite a good design.

[weidongxu-microsoft]

I think the only way we could deal it gracefully is to make an array of SdkModelProperty. Making everything to be strings and put "what this string means" in document for people to read is not quite a good design.

Yeah, I'd agree to this.

Though there could be some design issues, e.g. maybe due to looped reference (though not likely in LRO method).
Also, "paging" method have similar "string" design, of sdkMethod.response.resultPath and sdkMethod.nextLinkPath.
We may design them together (as for "paging", there is known case of nested properties, e.g. links -> nextLink -- and we really don't wish the nextLinkPath be links.nextLink).