Ordering properties in PowerShell classes with inheritance - powershell

Question

When using PowerShell classes with inheritance, is there any way to specify the order of parameters?
In there the inheritance example below, there are two classes (HttpResponseOK and HttpResponseBadRequest), both of which inherit another class (HttpResponse).
In this case, creating an instance of either HttpResponseOK and HttpResponseBadRequest results in the properties of those objects being listed before the properties of HttpResponse. For example -
Code
$HttpResponseOK = [HttpResponse]::OK("Everything is OK")
$HttpResponseOK | ConvertTo-Json
$HttpResponseBadRequest = [HttpResponse]::BadRequest("Something bad happened")
$HttpResponseBadRequest | ConvertTo-Json
Response
{
"notification": "Everything is OK",
"statusCode": 200
}
{
"exception": "Something bad happened",
"statusCode": 400
}
As you can see, when the response is sent to a user the statusCode property appears after the notification/exception property. Given that notification/exception will in reality be objects, this means that the statsCode is not initially visible in the response.
Is there a way to specify that statusCode should go before notification/exception?
Inheritance Example
Class HttpResponse
{
[int]$statusCode = [HttpStatusCode]::OK
[void]SetStatus(
[int]$statusCode
)
{
$this.statusCode = $statusCode
}
static [HttpResponseOK]OK(
[object]$notification
)
{
$response = [HttpResponseOK]::new($notification)
return $response
}
static [HttpResponseBadRequest]BadRequest(
[object]$exception
)
{
$response = [HttpResponseBadRequest]::new($exception)
return $response
}
}
Class HttpResponseOK : HttpResponse
{
[object]$notification
HttpResponseOK(
[object]$notification
)
{
$this.SetStatus([HttpStatusCode]::OK)
$this.notification = $notification
}
}
Class HttpResponseBadRequest : HttpResponse
{
[object]$exception
HttpResponseBadRequest(
[object]$exception
)
{
$this.SetStatus([HttpStatusCode]::BadRequest)
$this.exception = $exception
}
}

Answer 1

Never done much with classes in Powershell, but if I move the declarations for both [object]$notification and [object]$exception to the base class HttpResponse, The order seems to keep:
Class HttpResponse
{
[int]$statusCode = [System.Net.HttpStatusCode]::OK
[object]$notification
[object]$exception
[void]SetStatus(
[int]$statusCode
)
{
$this.statusCode = $statusCode
}
static [HttpResponseOK]OK(
[object]$notification
)
{
$response = [HttpResponseOK]::new($notification)
return $response
}
static [HttpResponseBadRequest]BadRequest(
[object]$exception
)
{
$response = [HttpResponseBadRequest]::new($exception)
return $response
}
}
Class HttpResponseOK : HttpResponse
{
HttpResponseOK(
[object]$notification
)
{
$this.SetStatus([System.Net.HttpStatusCode]::OK)
$this.notification = $notification
}
}
Class HttpResponseBadRequest : HttpResponse
{
HttpResponseBadRequest(
[object]$exception
)
{
$this.SetStatus([System.Net.HttpStatusCode]::BadRequest)
$this.exception = $exception
}
}
$HttpResponseOK = [HttpResponse]::OK("Everything is OK")
$HttpResponseOK | ConvertTo-Json
$HttpResponseBadRequest = [HttpResponse]::BadRequest("Something bad happened")
$HttpResponseBadRequest | ConvertTo-Json
Output:
{
"statusCode": 200,
"notification": "Everything is OK",
"exception": null
}
{
"statusCode": 400,
"notification": null,
"exception": "Something bad happened"
}