/// <summary>
/// Performs encoding transformation for each <c>XmlElement</c> of <c>App.config</c> where <c>Encode</c> transform is applied for.
/// </summary>
protected override void Apply()
{
//If target node has no attributes - skip the transform:
if (TargetNode.Attributes == null)
{
return;
}
//Getting list of passed XPath arguments to this Encode instance:
var encodeXPathArguments = new List <string>();
if (Arguments != null)
{
encodeXPathArguments.AddRange(Arguments);
}
//Adding DefaultAttributeName to XPath arguments if it's not present:
if (!encodeXPathArguments.Contains(DefaultAttributeName))
{
encodeXPathArguments.Add(DefaultAttributeName);
}
//Looping thru TargetNodes
foreach (var targetNode in TargetNodes.OfType <XmlElement>())
{
//For each TargetNode looping thru encodeXPathArguments
foreach (var arg in encodeXPathArguments)
{
//Getting TargetNode.XmlNode by XPath arg:
var destinationNode = targetNode.SelectSingleNode(arg);
if (destinationNode == null)
{
continue;
}
//TransformNode.XmlNode by XPath arg:
var applyTransformNode = TransformNode.SelectSingleNode(arg);
//Determine which XmlNode.InnerText to encode:
string valueToEncode =
applyTransformNode == null || string.IsNullOrEmpty(applyTransformNode.InnerText)
? destinationNode.InnerText //Getting default destination XmlNode.InnerText
: applyTransformNode.InnerText; //Getting XmlNode.InnerText specified in App.config transformer
if (string.IsNullOrEmpty(valueToEncode))
{
continue;
}
//If valueToEncode is OK - then encrypt it and assign to destination XmlNode.InnerText:
destinationNode.InnerText = _encryptorDecryptor.Encrypt(valueToEncode);
}
}
}