XmlEx

0.9.3

Src/Public/Add-XmlExAttribute.ps1

                                function Add-XmlExAttribute {

<#

    .SYNOPSIS

        Adds a XmlAttribute

    .DESCRIPTION

        The Add-XmlExAttribute cmdlet adds a System.Xml.XmlAttribute to a XmlEx

        document or existing System.Xml.XmlDocument object.

#>

    [CmdletBinding(DefaultParameterSetName = 'XmlEx')]

    [Alias('XmlAttribute')]

    [OutputType([System.Xml.XmlAttribute])]

    param (

        ## Xml attribute name to add

        [Parameter(Mandatory, Position = 0, ParameterSetName = 'XmlEx')]

        [Parameter(Mandatory, Position = 0, ParameterSetName = 'XmlElement')]

        [ValidateNotNullOrEmpty()]

        [System.String] $Name,

        ## Xml attribute value to add

        [Parameter(Mandatory, Position = 1, ParameterSetName = 'XmlEx')]

        [Parameter(Mandatory, Position = 1, ParameterSetName = 'XmlElement')]

        [ValidateNotNull()]

        [System.Object] $Value,

        ## Xml namespace assigned to the attribute

        [Parameter(ParameterSetName = 'XmlEx')]

        [Parameter(ParameterSetName = 'XmlElement')]

        [ValidateNotNullOrEmpty()]

        [System.Uri] $Namespace,

        ## Xml namespace prefixed assigned to the element

        [Parameter(ValueFromPipelineByPropertyName, ParameterSetName = 'XmlEx')]

        [Parameter(ValueFromPipelineByPropertyName, ParameterSetName = 'XmlElement')]

        [ValidateNotNullOrEmpty()]

        [System.String] $Prefix,

        ## Existing Xml element to add the attribute to

        [Parameter(Mandatory, ValueFromPipelineByPropertyName, ParameterSetName = 'XmlElement')]

        [ValidateNotNull()]

        [System.Xml.XmlElement] $XmlElement,

        ## Returns the create XmlAttrbiute object to the pipeline. By default, this cmdlet does not generate any output.

        [Parameter(ValueFromPipelineByPropertyName)]

        [System.Management.Automation.SwitchParameter] $PassThru

    )

    begin {

        if ($PSCmdlet.ParameterSetName -eq 'XmlElement') {

            Write-Debug ("Inferring document from element '{0}'," -f $Name);

            $_xmlExCurrentDocument = $XmlElement.OwnerDocument;

            $_xmlExCurrentElement = $XmlElement;

        }

        if (($PSBoundParameters.ContainsKey('Namespace')) -or

                ($PSBoundParameters.ContainsKey('Prefix'))) {

            [ref] $null = $PSBoundParameters.Remove('Name');

            $_xmlExCurrentNamespace = Resolve-XmlExNamespace @PSBoundParameters;

        }

        if ($null -eq $_xmlExCurrentDocument) {

            throw ($localized.XmlExDocumentNotFoundError);

        }

        if ($null -eq $_xmlExCurrentElement) {

            throw ($localized.XmlExElementNotFoundError);

        }

    } #end begin

    process {

        $attributeDisplayName = $Name;

        if (-not [System.String]::IsNullOrEmpty($_xmlExCurrentNamespace.Prefix)) {

            $attributeDisplayName = '{0}:{1}' -f $_xmlExCurrentNamespace.Prefix, $Name;

        }

        $_xmlExCurrentElementIndent ++;

        $padding = ''.PadRight($_xmlExCurrentElementIndent);

        $paddedMessage = '{0}{1}' -f $padding, ($localized.AddingAttribute -f $attributeDisplayName, $_xmlExCurrentElement.LocalName);

        Write-Verbose -Message $paddedMessage;

        $xmlAttribute = $_xmlExCurrentDocument.CreateAttribute($_xmlExCurrentNamespace.Prefix, $Name, $_xmlExCurrentNamespace.Uri);

        $xmlAttribute.InnerText = $Value;

        if ($_xmlExCurrentElement -is [System.Xml.XmlDocument]) {

            if ($null -eq $_xmlExCurrentDocument.DocumentElement) {

                throw ($localized.XmlExDocumentMissingXmlElementError);

            }

            [ref] $null = $_xmlExCurrentDocument.DocumentElement.SetAttributeNode($xmlAttribute);

        }

        else {

            [ref] $null = $_xmlExCurrentElement.SetAttributeNode($xmlAttribute);

        }

        if ($PassThru) {

            Write-Output -InputObject $xmlAttribute;

        }

    } #end process

} #end function XmlAttribute

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