Appel à la méthode statique générique dans PowerShell

vous pouvez appeler des méthodes génériques, référez-vous au post Invocation de Méthodes Génériques sur la Non-Classes Génériques en PowerShell.

Ce n'est pas simple, vous devez utiliser MakeGenericMethod fonction. C'est assez simple si la méthode n'a pas de dérogations, cela devient plus difficile si c'est le cas.

Juste au cas où, copie-collé de code à partir de là:

## Invoke-GenericMethod.ps1 
## Invoke a generic method on a non-generic type: 
## 
## Usage: 
## 
##   ## Load the DLL that contains our class
##   [Reflection.Assembly]::LoadFile("c:\temp\GenericClass.dll")
##
##   ## Invoke a generic method on a non-generic instance
##   $nonGenericClass = New-Object NonGenericClass
##   Invoke-GenericMethod $nonGenericClass GenericMethod String "How are you?"
##
##   ## Including one with multiple arguments
##   Invoke-GenericMethod $nonGenericClass GenericMethod String ("How are you?",5)
##
##   ## Ivoke a generic static method on a type
##   Invoke-GenericMethod ([NonGenericClass]) GenericStaticMethod String "How are you?"
## 

param(
    $instance = $(throw "Please provide an instance on which to invoke the generic method"),
    [string] $methodName = $(throw "Please provide a method name to invoke"),
    [string[]] $typeParameters = $(throw "Please specify the type parameters"),
    [object[]] $methodParameters = $(throw "Please specify the method parameters")
    ) 

## Determine if the types in $set1 match the types in $set2, replacing generic
## parameters in $set1 with the types in $genericTypes
function ParameterTypesMatch([type[]] $set1, [type[]] $set2, [type[]] $genericTypes)
{
    $typeReplacementIndex = 0
    $currentTypeIndex = 0

    ## Exit if the set lengths are different
    if($set1.Count -ne $set2.Count)
    {
        return $false
    }

    ## Go through each of the types in the first set
    foreach($type in $set1)
    {
        ## If it is a generic parameter, then replace it with a type from
        ## the $genericTypes list
        if($type.IsGenericParameter)
        {
            $type = $genericTypes[$typeReplacementIndex]
            $typeReplacementIndex++
        }

        ## Check that the current type (i.e.: the original type, or replacement
        ## generic type) matches the type from $set2
        if($type -ne $set2[$currentTypeIndex])
        {
            return $false
        }
        $currentTypeIndex++
    }

    return $true
}

## Convert the type parameters into actual types
[type[]] $typedParameters = $typeParameters

## Determine the type that we will call the generic method on. Initially, assume
## that it is actually a type itself.
$type = $instance

## If it is not, then it is a real object, and we can call its GetType() method
if($instance -isnot "Type")
{
    $type = $instance.GetType()
}

## Search for the method that:
##    - has the same name
##    - is public
##    - is a generic method
##    - has the same parameter types
foreach($method in $type.GetMethods())
{
    # Write-Host $method.Name
    if(($method.Name -eq $methodName) -and
    ($method.IsPublic) -and
    ($method.IsGenericMethod))
    {
        $parameterTypes = @($method.GetParameters() | % { $_.ParameterType })
        $methodParameterTypes = @($methodParameters | % { $_.GetType() })
        if(ParameterTypesMatch $parameterTypes $methodParameterTypes $typedParameters)
        {
            ## Create a closed representation of it
            $newMethod = $method.MakeGenericMethod($typedParameters)

            ## Invoke the method
            $newMethod.Invoke($instance, $methodParameters)

            return
        }
    }
}

## Return an error if we couldn't find that method
throw "Could not find method $methodName"