private XMLNodeInteraction FindNode(IInteraction parameters)
{
TextReader reader;
IInteraction candidate;
XMLNodeInteraction nodeInteraction = null;
// find an XmlNodeInteraction and hold on to that
if (parameters.TryGetClosest(typeof(XMLNodeInteraction), out candidate))
{
nodeInteraction = (XMLNodeInteraction)candidate;
}
// But if a new incoming body was acquired after that
if (TryGetDatareader(parameters, nodeInteraction, out reader))
{
XmlDocument document = new XmlDocument();
document.Load(reader);
if (this.IsForwardSourcing)
{
reader.Close();
}
nodeInteraction = new XMLNodeInteraction(parameters, document);
}
if (nodeInteraction == null)
{
// bitter failure
throw new Exception("Couldn't find or produce XML document");
}
return(nodeInteraction);
}
protected override bool Process(IInteraction parameters)
{
XMLNodeInteraction preceeding = FindNode(parameters);
string name;
bool successful = true;
XmlNodeList children;
if (this.Path.Length > 0)
{
children = preceeding.Node.SelectNodes(this.Path);
}
else
{
children = preceeding.Node.ChildNodes;
}
foreach (XmlNode child in children)
{
name = child.LocalName.TrimStart('#');
if (Branches.Has(name))
{
successful &= Branches[name].TryProcess(new XMLNodeInteraction(parameters, child));
}
else if (this.AnyNode != null)
{
successful &= this.AnyNode.TryProcess(new XMLNodeInteraction(parameters, child));
}
}
if ((children.Count == 0) && (this.NoNode != null))
{
successful &= this.NoNode.TryProcess(parameters);
}
return(successful);
}