Resolve ContentID in odata.bind annotation

[gathogojr]

Issues

This pull request fixes OData/odata.net#2442.

Description

Resolve ContentID in odata.bind annotation

Checklist (Uncheck if it is not completed)

• Test cases added
• Build and test with one-click build and test script passed

Additional work necessary

If documentation update is needed, please add "Docs Needed" label to the issue and provide details about the required document change in the issue.

[ElizabethOkerio]

@gathogojr is this valid "Parent@odata.bind": "$1" in a request body?. Should the writer write something like this?

[ElizabethOkerio]

is this Regex Matching? Is it possible to use substring or indexOf to do the matching instead of Regex. I remember some discussions where this Regex was being discouraged because of performance reasons.

[gathogojr]

@ElizabethOkerio We use similar logic in ODataMessageWrapper class. We're looking for a very particular pattern here - a $ followed by an integer. I think using Substring and Index would result into more complex logic

[habbes]

On an unrelated note, let's avoid substring in favor Span<char>.Slice() where possible, to avoid string allocations.

[gathogojr]

@gathogojr is this valid "Parent@odata.bind": "$1" in a request body?. Should the writer write something like this?

@ElizabethOkerio Yes. Consider the sample payload below that the customer provided on the issue. You should be able to establish a parent-child relationship in the manner illustrated

{
  "requests": [
    {
      "id": "1",
      "method": "POST",
      "url": "http://localhost:5254/odata/Parents",
      "headers": {
        "OData-Version": "4.0",
        "Content-Type": "application/json;odata.metadata=minimal",
        "Accept": "application/json;odata.metadata=minimal"
      },
      "body": {}
    },
    {
      "id": "2",
      "method": "POST",
      "url": "http://localhost:5254/odata/Children",
      "headers": {
        "OData-Version": "4.0",
        "Content-Type": "application/json;odata.metadata=minimal",
        "Accept": "application/json;odata.metadata=minimal"
      },
      "body": {
        "Parent@odata.bind": "$1"
      }
    }
  ]
}