internal/Resolve-XmlElement.ps1
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function Resolve-XmlElement { [CmdletBinding(DefaultParameterSetName = "QualifiedName")] [OutputType([System.Xml.XmlElement[]])] param ( # [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true, ValueFromPipeline = $true, Position = 1)] [System.Xml.XmlElement] $ParentNode, # [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true, ParameterSetName = "QualifiedName")] [string] $QualifiedName, # [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true, ParameterSetName = "Prefix")] [string] $Prefix, # [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true, ParameterSetName = "Prefix")] [string] $LocalName, # [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true, ParameterSetName = "QualifiedName")] [Parameter(Mandatory = $true, ValueFromPipelineByPropertyName = $true, ParameterSetName = "Prefix")] [string] $NamespaceURI, # [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)] [Alias("Clear")] [switch] $ClearExisting = $false, # [Parameter(Mandatory = $false, ValueFromPipelineByPropertyName = $true)] [Alias("Create")] [switch] $CreateMissing ) process { [System.Xml.XmlElement[]] $xmlElement = @() switch ($PSCmdlet.ParameterSetName) { 'QualifiedName' { [Microsoft.PowerShell.Commands.SelectXmlInfo[]] $resultSelectXml = Select-Xml -Xml $ParentNode -XPath ('./p:{0}' -f $QualifiedName) -Namespace @{ 'p' = $ParentNode.NamespaceURI } if ($ClearExisting) { foreach ($result in $resultSelectXml) { $ParentNode.RemoveChild($result.Node) | Out-Null } $resultSelectXml = @() } if ($resultSelectXml) { $xmlElement = $resultSelectXml.Node } elseif ($CreateMissing) { $xmlElement = $ParentNode.AppendChild($ParentNode.OwnerDocument.CreateElement($QualifiedName, $ParentNode.NamespaceURI)) } break } 'Prefix' { [Microsoft.PowerShell.Commands.SelectXmlInfo[]] $resultSelectXml = Select-Xml -Xml $ParentNode -XPath ('./{0}:{1}' -f $Prefix, $LocalName) -Namespace @{ $Prefix = $ParentNode.GetNamespaceOfPrefix($Prefix) } if ($ClearExisting) { foreach ($result in $resultSelectXml) { $ParentNode.RemoveChild($result.Node) | Out-Null } $resultSelectXml = @() } if ($resultSelectXml) { $xmlElement = $resultSelectXml.Node } elseif ($CreateMissing) { $xmlElement = $ParentNode.AppendChild($ParentNode.OwnerDocument.CreateElement($Prefix, $LocalName, $ParentNode.GetNamespaceOfPrefix($Prefix))) } break } } return $xmlElement } } |