PowerShell: Synchronizing a Folder (and Sub-Folders) Part 8

This update corrects an issue where parts of the configuration XML are missing;  what if you don’t want Exceptions or Filters?I noticed when parts of the XML were missing errors were generated.  As the script imports XML into an object I needed a function to test the existing of properties on that object, as below;

<#
.SYNOPSIS
    Returns if a property of an object exists.
.PARAMETER Queryobject
    The object to check the property on.
.PARAMETER PropertyName
    The name of the property to check the existance of.
#>
function Get-PropertyExists
{
    param
    (
        [PSObject]$Queryobject,
        [string]$PropertyName
    )
    Return (($Queryobject | Get-Member -MemberType Property) -contains $PropertyName)
}

It takes $QueryObject and gets a list of all the properties on it (via Get-Member) and checks if the passed $PropertyName is listed there.

        $CurrentExceptions=$CurrentFilter=$Null
        If(Get-PropertyExists -Queryobject $Pair -PropertyName ExceptionList)
        {
            $CurrentExceptions=@($Pair.ExceptionList.Exception)
        }
        If(Get-PropertyExists -Queryobject $Pair -PropertyName Filter)
        {
            $CurrentFilter=$Pair.Filter
        }    
        Sync-OneFolder -SourceFolder $Pair.Source -TargetFolder $Pair.Target -PassedExceptions $CurrentExceptions -Filter $CurrentFilter |
             Tee-Object -Variable Changes

In the main body of the script it only sets $CurrentFilter and $CurrentExceptions if there’s an existing entry in the XML.