public async Task <Message[]> TransformAsync(params Message[] inputMessages)
{
var inputXpathDoc = await InputMessageHelper.CreateXPathDocumentAsync(inputMessages);
var outputMessages = new List <Message>();
// Execute the transform:
using (var outputStream = new MemoryStream())
{
_xslTransform.Transform(inputXpathDoc, null, outputStream);
// Rewind the stream
outputStream.Position = 0;
using (var outputReader = XmlReader.Create(outputStream))
{
// Load the message:
var outputMessageNavigator = new XPathDocument(outputReader).CreateNavigator();
outputMessageNavigator.MoveToFirstChild();
// If this is a multi-part output message, create a new message for each part:
if (string.Equals(outputMessageNavigator.LocalName, Constants.MultipartRootElement) &&
string.Equals(outputMessageNavigator.NamespaceURI, Constants.MultipartNamespace))
{
var messageParts = outputMessageNavigator.Select(string.Format("/*[local-name()='{0}' and namespace-uri()='{2}']/*[starts-with(local-name(), '{1}') and namespace-uri()='{2}']",
Constants.MultipartRootElement,
Constants.MultipartPartElement,
Constants.MultipartNamespace));
foreach (XPathNavigator part in messageParts)
{
var msg = new Message {
ContentStream = new MemoryStream(Encoding.UTF8.GetBytes(part.InnerXml))
};
outputMessages.Add(msg);
}
}
else
{
// Rewind the stream
outputStream.Position = 0;
// Copy the result to an output message:
var msg = new Message {
ContentStream = new MemoryStream()
};
await outputStream.CopyToAsync(msg.ContentStream);
// Rewind the stream
msg.ContentStream.Position = 0;
outputMessages.Add(msg);
}
}
}
return(outputMessages.ToArray());
}
public static async Task <T> EvaluateAsync <T>(string xPathExpression, params Message[] msgs)
{
var inputXpathDoc = await InputMessageHelper.CreateXPathDocumentAsync(msgs);
var navigator = inputXpathDoc.CreateNavigator();
return((T)navigator.Evaluate(xPathExpression));
}
