public override IXLog Parse(Stream stream)
{
Stack <IXAttributable> attributableStack = new Stack <IXAttributable>();
Stack <XAttribute> attributeStack = new Stack <XAttribute>();
IXEvent evt = null;
IXLog log = null;
IXTrace trace = null;
List <XAttribute> globals = null;
using (XmlReader reader = XmlReader.Create(stream))
{
List <string> ATTR_TYPE_TAGS = new List <string>(new string[] { "string", "date", "int", "float", "boolean", "id", "list", "container" });
ATTR_TYPE_TAGS.Sort();
while (reader.Read())
{
if (reader.IsStartElement())
{
// start tag found
string tagName = reader.LocalName.Trim();
if (tagName.Length == 0)
{
tagName = reader.Name.Trim(); // <= qualified name
}
if (ATTR_TYPE_TAGS.Contains(tagName.ToLower()))
{
// The tag is an attribute
string key = reader.GetAttribute("key") ?? "";
string val = reader.GetAttribute("value") ?? "";
XExtension ext = null;
int colonindex = key.IndexOf(":", StringComparison.InvariantCultureIgnoreCase);
if (colonindex > 0)
{
string prefix = key.Substring(0, colonindex);
ext = XExtensionManager.Instance.GetByPrefix(prefix);
}
XAttribute attr = null;
switch (tagName)
{
case "string":
attr = factory.CreateAttributeLiteral(key, val, ext);
break;
case "int":
attr = factory.CreateAttributeDiscrete(key, long.Parse(val), ext);
break;
case "boolean":
attr = factory.CreateAttributeBoolean(key, bool.Parse(val), ext);
break;
case "date":
DateTime d = XAttributeTimestamp.Parse(val);
attr = factory.CreateAttributeTimestamp(key, d, ext);
break;
case "float":
attr = factory.CreateAttributeContinuous(key, double.Parse(val), ext);
break;
case "id":
attr = factory.CreateAttributeID(key, XID.Parse(val), ext);
break;
case "list":
attr = factory.CreateAttributeList(key, ext);
break;
case "container":
attr = factory.CreateAttributeContainer(key, ext);
break;
default:
XLogging.Log("Unknown tag '" + tagName + "'", XLogging.Importance.WARNING);
break;
}
if (reader.IsEmptyElement)
{
// No child nodes, we can directly store it
if (globals != null)
{
// attribute is global
globals.Add(attr);
}
else
{
attributableStack.Peek().GetAttributes().Add(attr.Key, attr);
if ((!(attributeStack.Count == 0)) &&
(attributeStack.Peek() is XAttributeCollection))
{
((XAttributeCollection)attributeStack.Peek()).AddToCollection(attr);
}
}
}
else if (attr != null)
{
attributeStack.Push(attr);
attributableStack.Push((IXAttributable)attr);
}
}
else if ("event".Equals(tagName.ToLower()))
{
// Parse an event
evt = factory.CreateEvent();
attributableStack.Push(evt);
}
else if ("trace".Equals(tagName.ToLower()))
{
trace = factory.CreateTrace();
attributableStack.Push(trace);
}
else if ("log".Equals(tagName.ToLower()))
{
log = factory.CreateLog();
((XLog)log).Version = reader.GetAttribute("xes.version") ?? "2.0";
((XLog)log).Features = reader.GetAttribute("xes.features") ?? "";
attributableStack.Push(log);
}
else if ("extension".Equals(tagName.ToLower()))
{
XExtension extension = null;
String uriString = reader.GetAttribute("uri");
if (uriString != null)
{
extension = XExtensionManager.Instance.GetByUri(new UriBuilder(uriString).Uri);
}
else
{
string prefixString = reader.GetAttribute("prefix");
if (prefixString != null)
{
extension = XExtensionManager.Instance.GetByPrefix(prefixString);
}
}
if (extension != null)
{
log.Extensions.Add(extension);
}
else
{
XLogging.Log("Unknown extension: " + uriString, XLogging.Importance.ERROR);
}
}
else if ("global".Equals(tagName.ToLower()))
{
string scope = reader.GetAttribute("scope");
if (scope.Equals("trace"))
{
globals = log.GlobalTraceAttributes;
}
else if (scope.Equals("event"))
{
globals = log.GlobalEventAttributes;
}
}
else if ("classifier".Equals(tagName.ToLower()))
{
string name = reader.GetAttribute("name");
string keys = reader.GetAttribute("keys");
if ((name == null) || (keys == null) || (name.Length <= 0) || (keys.Length <= 0))
{
continue;
}
IList <string> keysList = FixKeys(log, XTokenHelper.ExtractTokens(keys));
string[] keysArray = new string[keysList.Count];
int i = 0;
foreach (string key in keysList)
{
keysArray[(i++)] = key;
}
IXEventClassifier classifier = new XEventAttributeClassifier(name, keysArray);
log.Classifiers.Add(classifier);
}
}
else
{
// end tag found
string tagName = reader.LocalName.Trim().ToLower();
if (tagName.Length == 0)
{
tagName = reader.Name.Trim().ToLower(); // <= qualified name
}
if ("global".Equals(tagName))
{
globals = null;
}
else if (ATTR_TYPE_TAGS.Contains(tagName))
{
XAttribute attribute = attributeStack.Pop();
attributableStack.Pop();
if (globals != null)
{
globals.Add(attribute);
}
else
{
attributableStack.Peek().GetAttributes().Add(attribute.Key, attribute);
if ((!(attributeStack.Count == 0)) &&
(attributeStack.Peek() is XAttributeCollection))
{
((XAttributeCollection)attributeStack.Peek()).AddToCollection(attribute);
}
}
}
else if ("event".Equals(tagName))
{
trace.Add(evt);
evt = null;
attributableStack.Pop();
}
else if ("trace".Equals(tagName))
{
log.Add(trace);
trace = null;
attributableStack.Pop();
}
else if ("log".Equals(tagName))
{
attributableStack.Pop();
}
}
}
}
return(log);
}
/// <summary>
/// Composes the appropriate attribute type from the string-based information
/// found, e.g., in XML serializations.
/// </summary>
/// <returns>An appropriate attribute.</returns>
/// <param name="factory">Factory to use for creating the attribute.</param>
/// <param name="key">Key of the attribute.</param>
/// <param name="value">Value of the attribute.</param>
/// <param name="type">Type string of the attribute.</param>
/// <param name="extension">Extension of the attribute (can be <code>null</code>).</param>
public static XAttribute ComposeAttribute(IXFactory factory, string key, string value, string type,
XExtension extension)
{
type = type.Trim();
if (type.Equals("LIST", StringComparison.CurrentCultureIgnoreCase))
{
XAttributeList attr = factory.CreateAttributeList(key, extension);
return(attr);
}
if (type.Equals("CONTAINER", StringComparison.CurrentCultureIgnoreCase))
{
XAttributeContainer attr = factory.CreateAttributeContainer(key, extension);
return(attr);
}
if (type.Equals("LITERAL", StringComparison.CurrentCultureIgnoreCase))
{
XAttributeLiteral attr = factory.CreateAttributeLiteral(key, value, extension);
return(attr);
}
if (type.Equals("BOOLEAN", StringComparison.CurrentCultureIgnoreCase))
{
XAttributeBoolean attr = factory.CreateAttributeBoolean(key, bool.Parse(value), extension);
return(attr);
}
if (type.Equals("CONTINUOUS", StringComparison.CurrentCultureIgnoreCase))
{
XAttributeContinuous attr = factory.CreateAttributeContinuous(key, double.Parse(value), extension);
return(attr);
}
if (type.Equals("DISCRETE", StringComparison.CurrentCultureIgnoreCase))
{
XAttributeDiscrete attr = factory.CreateAttributeDiscrete(key, long.Parse(value), extension);
return(attr);
}
if (type.Equals("TIMESTAMP", StringComparison.CurrentCultureIgnoreCase))
{
IXAttributeTimestamp attr;
try
{
attr = factory.CreateAttributeTimestamp(key, DateTime.Parse(value), extension);
}
catch (FormatException)
{
throw new InvalidOperationException("OpenXES: could not parse date-time attribute. Value: " + value);
}
return((XAttributeTimestamp)attr);
}
if (type.Equals("ID", StringComparison.CurrentCultureIgnoreCase))
{
XAttributeID attr = factory.CreateAttributeID(key, XID.Parse(value), extension);
return(attr);
}
throw new InvalidOperationException("OpenXES: could not parse attribute type!");
}