public static bool LoadXmlFile(string xmlFilePath, out XmlFragmentList fragments, out string errorMsg,
bool useRDMStructMode = true)
{
var result = LoadXmlFileAsync(xmlFilePath, useRDMStructMode).GetAwaiter().GetResult();
fragments = result.Item2;
errorMsg = result.Item3;
return(result.Item1);
}
// ProcessXMLDataAsync method, used to parse the the XML data, input is Stream
// Returns multiple values as the method is async method so it's not allow out or ref syntax
// Return value as <success(boolean),XMLFragmentList,error message>
private static async Task <Tuple <bool, XmlFragmentList, string> > ProcessXmlDataAsync(Stream xmlStream,
bool useRDMStrictMode = true)
{
var errorMessage = string.Empty;
var settings = new XmlReaderSettings {
ConformanceLevel = ConformanceLevel.Fragment, Async = true
};
var fragments = new XmlFragmentList();
var xmlFragmentIndex = 0;
var bSuccess = true;
var bValidTag = false;
using (var reader = XmlReader.Create(xmlStream, settings))
{
try
{
while (await reader.ReadAsync().ConfigureAwait(false))
{
switch (reader.NodeType)
{
case XmlNodeType.Comment:
{
if (useRDMStrictMode)
{
var commentVal = reader.Value.Trim();
if (commentVal.ToLower().StartsWith("incoming") ||
commentVal.ToLower().StartsWith("outgoing"))
{
xmlFragmentIndex++;
var fragment = new XMLFragment
{
FragmentNumber = xmlFragmentIndex,
IsIncomingMsg =
commentVal.ToLower().StartsWith("incoming"),
IsOutGoingMsg =
commentVal.ToLower().StartsWith("outgoing"),
MsgTypeRawXmlData = reader.Value
};
bValidTag = true;
fragments.Add(xmlFragmentIndex, fragment);
}
else if (bValidTag && commentVal.ToLower().StartsWith("rwfmajorver"))
{
fragments.Get(xmlFragmentIndex).RWFMajorMinorVersion = commentVal;
fragments.Get(xmlFragmentIndex).RWFMajorMinorVersionRawXmlData =
reader.Value;
}
else if (bValidTag && StartWithDayOfWeek(commentVal.ToLower())
) // For EMA Java Trace
{
fragments.Get(xmlFragmentIndex).TimeStamp = commentVal;
fragments.Get(xmlFragmentIndex).TimeRawXmlData = reader.Value;
}
else if (bValidTag && commentVal.ToLower().StartsWith("time:") &&
fragments.Count > 0)
{
var strArray = commentVal.Split();
var timeStr = strArray.Length > 1 ? strArray[1].Trim() : "";
fragments.Get(xmlFragmentIndex).TimeStamp = timeStr;
fragments.Get(xmlFragmentIndex).TimeRawXmlData = reader.Value;
}
}
await reader.SkipAsync().ConfigureAwait(false);
}
break;
case XmlNodeType.Element:
{
if (!useRDMStrictMode)
{
xmlFragmentIndex++;
var fragment = new XMLFragment
{
FragmentNumber = xmlFragmentIndex,
IsIncomingMsg = false,
IsOutGoingMsg = false,
MsgTypeRawXmlData = string.Empty
};
fragments.Add(xmlFragmentIndex, fragment);
}
if (fragments.Get(xmlFragmentIndex) == null)
{
bSuccess = false;
errorMessage =
$"Cannot find Fragment# {xmlFragmentIndex} in the list\r\nThere could be problem from missing required comments before parsing the XML Element\r\n";
continue;
}
fragments.Get(xmlFragmentIndex).RdmMessageType = reader.Name;
var nodeElem = XNode.ReadFrom(reader);
var xmlRawValue = nodeElem;
fragments.Get(xmlFragmentIndex).RawXmlData = xmlRawValue.ToString();
bValidTag = false;
}
break;
default:
await reader.SkipAsync().ConfigureAwait(false);
continue;
}
}
}
catch (Exception ex)
{
bSuccess = false;
fragments.Remove(xmlFragmentIndex);
errorMessage =
$"Detect and error when parsing the XML fragment\r\n{ex.Message}\r\nFragment {xmlFragmentIndex} has been removed";
await reader.SkipAsync();
}
}
return(new Tuple <bool, XmlFragmentList, string>(bSuccess, fragments, errorMessage));
}