Convert XML to HashTable or JSON

Convert-XmlToHash.ps1

function Convert-XmlToHash {
    [CmdletBinding(DefaultParameterSetName = 'XmlDocument')]
    Param (
        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ParameterSetName = 'XmlDocument')]
        [System.Xml.XmlDocument]$XmlDocument
        ,
        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ParameterSetName = 'XmlElement')]
        [System.Xml.XmlElement]$InputObject
        ,
        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ParameterSetName = 'XmlText')]
        [System.Xml.XmlText]$XmlText
        ,
        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ParameterSetName = 'XmlAttribute')]
        [System.Xml.XmlAttribute]$XmlAttribute
    )
    Process {
        switch ($PSCmdlet.ParameterSetName) {
            'XmlDocument' {
                $XmlDocument.DocumentElement | Convert-XmlToHash
            }
            'XmlElement' {
                [hashtable]@{
                    "$($InputObject.Name)" = (@() + $InputObject.Attributes + $InputObject.ChildNodes) | Convert-XmlToHash
                }                
            }
            'XmlText' {
                $XmlText.Value
            }
            'XmlAttribute' {
                [hashtable]@{
                    "@$($XmlAttribute.Name)" = $XmlAttribute.Value
                }
            }
        }
    }
}

ExampleOutput.txt

Example #1
{
    "root":  [
                 {
                     "node1":  "test"
                 },
                 {
                     "node1":  "test2"
                 },
                 {
                     "node1b":  "test3"
                 },
                 {
                     "node1c":  [
                                    {
                                        "node2":  "test4"
                                    },
                                    {
                                        "node2":  [
                                                      {
                                                          "@id":  "attrtest"
                                                      },
                                                      "test5"
                                                  ]
                                    }
                                ]
                 }
             ]
}

Example #2
{
    "root":  {
                 "node1":  "hello"
             }
}

Example #3
{
    "root":  {
                 "node1":  {

                           }
             }
}

Example #4
{
    "root":  {

             }
}

Example #5
{
    "root":  [
                 {
                     "@a":  "one"
                 },
                 {
                     "@b":  "two"
                 },
                 {
                     "@c":  "three"
                 }
             ]
}

ExampleUsage.ps1

"`nExample #1"
[xml]'<root><node1>test</node1><node1>test2</node1><node1b>test3</node1b><node1c><node2>test4</node2><node2 id="attrtest">test5</node2></node1c></root>' | Convert-XmlToHash | ConvertTo-Json -Depth 100

"`nExample #2"
[xml]'<root><node1>hello</node1></root>' | Convert-XmlToHash | ConvertTo-Json -Depth 100

"`nExample #3"
[xml]'<root><node1 /></root>' | Convert-XmlToHash | ConvertTo-Json -Depth 100

"`nExample #4"
[xml]'<root />' | Convert-XmlToHash | ConvertTo-Json -Depth 100

"`nExample #5"
[xml]'<root a="one" b="two" c="three" />' | Convert-XmlToHash | ConvertTo-Json -Depth 100