Implement export Windows PowerShell adapter

powershell-adapter/Tests/win_powershellgroup.tests.ps1

@@ -322,6 +322,22 @@ class PSClassResource {
     [void] Set() {
 
     }
+
+    static [PSClassResource[]] Export()
+    {
+        $resultList = [System.Collections.Generic.List[PSClassResource]]::new()
+        $resultCount = 5
+        if ($env:PSClassResourceResultCount) {
+            $resultCount = $env:PSClassResourceResultCount
+        }
+        1..$resultCount | %{
+            $obj = New-Object PSClassResource
+            $obj.Name = "Object$_"
+            $resultList.Add($obj)
+        }
+
+        return $resultList.ToArray()
+    }
 }
 '@
 
@@ -350,4 +366,12 @@ class PSClassResource {
     $LASTEXITCODE | Should -Be 0
     $out.afterstate.InDesiredState | Should -Be $true
   }
+
+  It 'Export works with class-based PS DSC resources' -Skip:(!$IsWindows) {
+
+    $out = dsc resource export -r PSClassResource/PSClassResource | ConvertFrom-Json
+    $LASTEXITCODE | Should -Be 0
+    $out | Should -Not -BeNullOrEmpty
+    $out.resources.count | Should -Be 5
+  }
 }

powershell-adapter/psDscAdapter/win_psDscAdapter.psm1

@@ -438,9 +438,21 @@ function Invoke-DscOperation {
                             $addToActualState.properties = [psobject]@{'InDesiredState' = $Result }
                         }
                         'Export' {
-                            $t = $dscResourceInstance.GetType()
-                            $method = $t.GetMethod('Export')
-                            $resultArray = $method.Invoke($null, $null)
+                            $method = ValidateMethod -operation $Operation -class $dscResourceInstance
+                            $resultArray = @()
+                            $raw_obj_array = $method.Invoke($null, $null)
+                            foreach ($raw_obj in $raw_obj_array) {
+                                $Result_obj = @{}
+                                $ValidProperties | ForEach-Object { 
+                                    if ($raw_obj.$_ -is [System.Enum]) {
+                                        $Result_obj[$_] = $raw_obj.$_.ToString()
+                                    }
+                                    else { 
+                                        $Result_obj[$_] = $raw_obj.$_ 
+                                    }
+                                }
+                                $resultArray += $Result_obj
+                            }
                             $addToActualState = $resultArray
                         }
                     }
@@ -532,6 +544,33 @@ function GetTypeInstanceFromModule {
     return $instance
 }
 
+# ValidateMethod checks if the specified method exists in the class
+function ValidateMethod {
+    param (
+        [Parameter(Mandatory = $true)]
+        [ValidateSet('Export', 'WhatIf')]
+        [string] $operation,
+        [Parameter(Mandatory = $true)]
+        [object] $class
+    )
+
+    $t = $class.GetType()
+    $methods = $t.GetMethods() | Where-Object -Property Name -EQ $operation
+    $method = foreach ($mt in $methods) {
+        if ($mt.GetParameters().Count -eq 0) {
+            $mt
+            break
+        }
+    }
+
+    if ($null -eq $method) {
+        "Method '$operation' not implemented by resource '$($t.Name)'" | Write-DscTrace -Operation Error
+        exit 1
+    }
+
+    return $method
+}
+
 # cached resource
 class dscResourceCacheEntry {
     [string] $Type

powershell-adapter/windowspowershell.dsc.resource.json

@@ -1,41 +1,14 @@
 {
-    "$schema": "https://aka.ms/dsc/schemas/v3/bundled/resource/manifest.json",
-    "type": "Microsoft.Windows/WindowsPowerShell",
-    "version": "0.1.0",
-    "kind": "adapter",
-    "description": "Resource adapter to classic DSC Powershell resources in Windows PowerShell.",
-    "tags": [
-      "PowerShell"
-    ],
-    "adapter": {
-      "list": {
-        "executable": "powershell",
-        "args": [
-          "-NoLogo",
-          "-NonInteractive",
-          "-NoProfile",
-          "-ExecutionPolicy",
-          "Bypass",
-          "-Command",
-          "./psDscAdapter/powershell.resource.ps1 List"
-        ]
-        },
-      "config": "full"
-    },
-    "get": {
-      "executable": "powershell",
-      "args": [
-        "-NoLogo",
-        "-NonInteractive",
-        "-NoProfile",
-        "-ExecutionPolicy",
-        "Bypass",
-        "-Command",
-        "$Input | ./psDscAdapter/powershell.resource.ps1 Get"
-      ],
-      "input": "stdin"
-      },
-    "set": {
+  "$schema": "https://aka.ms/dsc/schemas/v3/bundled/resource/manifest.json",
+  "type": "Microsoft.Windows/WindowsPowerShell",
+  "version": "0.1.0",
+  "kind": "adapter",
+  "description": "Resource adapter to classic DSC Powershell resources in Windows PowerShell.",
+  "tags": [
+    "PowerShell"
+  ],
+  "adapter": {
+    "list": {
       "executable": "powershell",
       "args": [
         "-NoLogo",
@@ -44,39 +17,80 @@
         "-ExecutionPolicy",
         "Bypass",
         "-Command",
-        "$Input | ./psDscAdapter/powershell.resource.ps1 Set"
-      ],
-      "input": "stdin",
-      "preTest": true
-      },
-    "test": {
-      "executable": "powershell",
-      "args": [
-        "-NoLogo",
-        "-NonInteractive",
-        "-NoProfile",
-        "-ExecutionPolicy",
-        "Bypass",
-        "-Command",
-        "$Input | ./psDscAdapter/powershell.resource.ps1 Test"
-      ],
-      "input": "stdin",
-      "return": "state"
-      },
-    "validate": {
-        "executable": "powershell",
-        "args": [
-          "-NoLogo",
-          "-NonInteractive",
-          "-NoProfile",
-          "-ExecutionPolicy",
-          "Bypass",
-          "-Command",
-          "$Input | ./psDscAdapter/powershell.resource.ps1 Validate"
-          ]
-      },
-    "exitCodes": {
-      "0": "Success",
-      "1": "Error"
-    }
+        "./psDscAdapter/powershell.resource.ps1 List"
+      ]
+    },
+    "config": "full"
+  },
+  "get": {
+    "executable": "powershell",
+    "args": [
+      "-NoLogo",
+      "-NonInteractive",
+      "-NoProfile",
+      "-ExecutionPolicy",
+      "Bypass",
+      "-Command",
+      "$Input | ./psDscAdapter/powershell.resource.ps1 Get"
+    ],
+    "input": "stdin"
+  },
+  "set": {
+    "executable": "powershell",
+    "args": [
+      "-NoLogo",
+      "-NonInteractive",
+      "-NoProfile",
+      "-ExecutionPolicy",
+      "Bypass",
+      "-Command",
+      "$Input | ./psDscAdapter/powershell.resource.ps1 Set"
+    ],
+    "input": "stdin",
+    "preTest": true
+  },
+  "test": {
+    "executable": "powershell",
+    "args": [
+      "-NoLogo",
+      "-NonInteractive",
+      "-NoProfile",
+      "-ExecutionPolicy",
+      "Bypass",
+      "-Command",
+      "$Input | ./psDscAdapter/powershell.resource.ps1 Test"
+    ],
+    "input": "stdin",
+    "return": "state"
+  },
+  "export": {
+    "executable": "powershell",
+    "args": [
+      "-NoLogo",
+      "-NonInteractive",
+      "-NoProfile",
+      "-ExecutionPolicy",
+      "Bypass",
+      "-Command",
+      "$Input | ./psDscAdapter/powershell.resource.ps1 Export"
+    ],
+    "input": "stdin",
+    "return": "state"
+  },
+  "validate": {
+    "executable": "powershell",
+    "args": [
+      "-NoLogo",
+      "-NonInteractive",
+      "-NoProfile",
+      "-ExecutionPolicy",
+      "Bypass",
+      "-Command",
+      "$Input | ./psDscAdapter/powershell.resource.ps1 Validate"
+    ]
+  },
+  "exitCodes": {
+    "0": "Success",
+    "1": "Error"
   }
+}