(PowerShell) Get the Root of a JSON Document

Demonstrates how to get back to the JSON root object from anywhere in the JSON document. This example uses the following JSON document:

{
  "flower": "tulip",
  "abc":
    {
    "x": [
       { "a" : 1 },
       { "b1" : 100, "b2" : 200 },
       { "c" : 3 }
    ],
    "y": 200,
    "z": 200
    }
}

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

$json = New-Object Chilkat.JsonObject

$jsonStr = "{`"flower`": `"tulip`",`"abc`":{`"x`": [{ `"a`" : 1 },{ `"b1`" : 100, `"b2`" : 200 },{ `"c`" : 3 }],`"y`": 200,`"z`": 200}}"

$success = $json.Load($jsonStr)
if ($success -ne $true) {
    $($json.LastErrorText)
    exit
}

# Get the "abc" object.
$abcObj = $json.ObjectOf("abc")
if ($json.LastMethodSuccess -eq $false) {
    $("abc object not found.")
    exit
}

# Side note: The JSON of a sub-part of the document can be emitted from any JSON object:
$abcObj.EmitCompact = $false
$($abcObj.Emit())

# Navigate to the "x" array
$xArray = $abcObj.ArrayOf("x")
# We'll skip the null check and assume it's non-null...

# Navigate to the 2nd object contained within the array.  This contains members b1 and b2
$bObj = $xArray.ObjectAt(1)
# We'll skip the null check and assume it's non-null...

# Show that we're at "b1/b2".
# The value of "b1" should be "200"
$("b2 = " + $bObj.IntOf("b2"))

# Now go back to the JSON doc root:
$docRoot = $bObj.GetDocRoot()
# We'll skip the null check and assume it's non-null...

# Pretty-print the JSON doc from the root to show that this is indeed the root.
$docRoot.EmitCompact = $false
$($docRoot.Emit())