/// <summary>
/// Executes the pipeline
/// </summary>
/// <param name="input">The input to the first transformation.</param>
/// <param name="output">The writer to write the output of the final transformationstage to.</param>
public void Execute(XmlTextReader input, XmlTextWriter output)
{
XmlReader currentInput = input;
MemoryStream inStream = new MemoryStream(), outStream = inStream;
XmlWriter currentOutput;
for (int i = 0; i < _stages.Count; i++)
{
XsltPipelineStage stage = _stages[i];
if (i == _stages.Count - 1)
{
//Final stage
currentOutput = output;
}
else
{
//Interim stage, make sure the stream is not closed so
//we can read from it later on.
XmlWriterSettings settings = new XmlWriterSettings();
settings.CloseOutput = false;
currentOutput = XmlWriter.Create(outStream, settings);
}
stage.Execute(currentInput, currentOutput, TransformationArguments);
if (i != _stages.Count - 1)
{
//Make sure everything is in the memory stream
if (currentOutput.WriteState != WriteState.Closed)
{
currentOutput.Flush();
}
//reset the output stream
inStream = new MemoryStream();
outStream.WriteTo(inStream);
inStream.Position = 0;
outStream.Close();
//Ouput -> Input
currentInput = new XmlTextReader(inStream);
outStream = new MemoryStream();
}
else
{
inStream.Close();
outStream.Close();
}
}
}
/// <summary>
/// Adds the stage.
/// </summary>
/// <param name="stage">The stage.</param>
public void AddStage(XsltPipelineStage stage)
{
_stages.Add(stage);
}
/// <summary>
/// Adds the stage.
/// </summary>
/// <param name="stage">The stage.</param>
public void AddStage(XsltPipelineStage stage)
{
_stages.Add(stage);
}