/// <summary>
/// Loads the transitions defined within the given node.
/// </summary>
/// <remarks>
/// If the given parent node has an <b>id</b> attribute, that ID value is used
/// as the parent state ID for the transitions loaded from the node.
/// </remarks>
/// <param name="parentNode">The XmlNode to load the transitions from.</param>
/// <returns>A <b>List<Transition></b> containing the transitions loaded from the given node.</returns>
private List<Transition> LoadTransitions(
XmlNode parentNode)
{
List<Transition> tranistions = new List<Transition>();
// load the node's transitions
XmlNodeList transitionNodes = parentNode.SelectNodes("transition");
long id = -1;
// if the parent node has an ID, get it
if (parentNode.Attributes[ID_ATTRIBUTE] != null) {
try {
id = long.Parse(parentNode.Attributes[ID_ATTRIBUTE].Value);
} catch (Exception) {}
}
foreach (XmlNode transNode in transitionNodes) {
try {
Transition trans = new Transition(id,
long.Parse(transNode.Attributes["targetState"].Value),
transNode.Attributes["name"].Value.ToLower(),
(transNode.Attributes["publishKeyParams"] == null)
? null
: transNode.Attributes["publishKeyParams"].Value.ToLower(),
(transNode.Attributes["contentProvider"] == null)
? null
: transNode.Attributes["contentProvider"].Value.ToLower());
tranistions.Add(trans);
} catch (Exception e) {
LogManager.GetCurrentClassLogger().Error(
errorMessage => errorMessage("ConfigSmStateDao.LoadTransitions: failure loading transition ({0}): ", transNode.OuterXml), e);
}
}
return tranistions;
}
/// <summary>
/// Loads the state/tranistion information for an XML config file.
/// </summary>
/// <remarks>
/// The path to the config file to load is specified in the application's config file
/// appSettings section, with the "statesConfigPath" setting.
/// </remarks>
/// <returns>A <b></b> object with the state/transition information loaded
/// from the config file.</returns>
public StateInfo LoadStates()
{
StateInfo info = new StateInfo();
Hashtable transGroups = new Hashtable();
try {
// get the path to the states.config directory from web.config
string statesConfigPath = AppInfo.BasePath + ConfigurationManager.AppSettings["statesDiagramPath"];
if (statesConfigPath == null) {
throw new ApplicationException("No states.config path in config file.");
}
// read all the .graphml files in the directory.
// XmlDocument stateSettings = new XmlDocument();
// Key is the StateID, value is the element representing the state
Dictionary<long, IState> states = new Dictionary<long, IState>();
// key is the id of the node, value is the transition name
Dictionary<string, Dictionary<string, long>> transitionGroups = new Dictionary<string, Dictionary<string, long>>();
Dictionary<long, List<string>> stateTransitionGroups = new Dictionary<long, List<string>>();
if (Directory.Exists(statesConfigPath)) {
if (Directory.GetFiles(statesConfigPath, "*.graphml", SearchOption.TopDirectoryOnly).Length > 0) {
string[] graphmlFiles = Directory.GetFiles(statesConfigPath, "*.graphml", SearchOption.TopDirectoryOnly);
foreach (string fileName in graphmlFiles) {
PreProcessGraphmlFile(fileName);
}
foreach (string fileName in graphmlFiles) {
ProcessGraphmlFile(fileName, states, transitionGroups, stateTransitionGroups);
}
foreach (KeyValuePair<long, List<string>> kvp in stateTransitionGroups) {
long fromStateId = kvp.Key;
IState state = states[fromStateId];
foreach (string stateTransitionGroup in kvp.Value) {
if (transitionGroups.ContainsKey(stateTransitionGroup)) {
Dictionary<string, long> transitionGroup = transitionGroups[stateTransitionGroup];
foreach (KeyValuePair<string, long> trans in transitionGroup) {
long toStateId = trans.Value;
Transition transition = new Transition(fromStateId, toStateId, trans.Key, null);
try {
((BaseState)state).AddTransition(transition);
} catch {
this.log.Debug(debug => debug("Attempting to add a transition ({0}) to a state ({1}) that already exists.",
trans.Key,
toStateId));
}
}
} else {
this.log.Debug(debug => debug("Unable to locate transition group {0} for stateid {1}", stateTransitionGroup, fromStateId));
}
}
}
} else {
this.log.Error(error => error("LoadStates: No States config files found"));
throw new IndexOutOfRangeException("LoadStates: No States config files found");
}
} else {
this.log.Error(error => error("LoadStates: No States Folder found"));
throw new NotSupportedException("LoadStates: No States Folder found");
}
info.States = states.Values.ToArray();
this.log.Info(infoMessage => infoMessage("Successfully loaded page config settings"));
} catch (Exception e) {
this.log.Error(error => error("Error occured in LoadStates: ", e));
throw;
} finally {
transGroups.Clear();
}
return info;
}
public void AddTransition(
Transition trans)
{
this.transitions.Add(trans.Name, trans);
}
private void ProcessGraphmlFile(
string filename,
IDictionary<long, IState> states,
IDictionary<string, Dictionary<string, long>> transitionGroups,
IDictionary<long, List<string>> stateTransitionGroups)
{
// Key is the id of the node, Value is the stateID
Dictionary<string, int> transitionLookup = new Dictionary<string, int>();
Dictionary<string, string> transitionGroupLookup = new Dictionary<string, string>();
XDocument xdoc = XDocument.Load(filename);
XPathNavigator nav = xdoc.CreateNavigator();
IEnumerable<XPathNavigator> nodes = this.FindNodes(nav, "node");
IEnumerable<XPathNavigator> edges = this.FindNodes(nav, "edge");
foreach (XPathNavigator node in nodes) {
string type = string.Empty;
string contents = string.Empty;
string nodeId = string.Empty;
XPathNavigator nodeAttributes = node.Clone();
nodeAttributes.MoveToFirstAttribute();
do {
if (nodeAttributes.Name == "id") {
nodeId = nodeAttributes.Value;
break;
}
} while (nodeAttributes.MoveToNextAttribute());
node.MoveToChild(XPathNodeType.All);
XPathNavigator label = null;
XPathNavigator shape = null;
do {
if ((node.Name == "data") && node.HasAttributes) {
XPathNavigator dataNodes = node.Clone();
do {
XPathNavigator dataNode = dataNodes.Clone();
string key = dataNodes.GetAttribute("key", string.Empty);
if (!string.IsNullOrEmpty(key) &&
key.StartsWith("d") &&
dataNode.HasChildren) {
try {
XPathNavigator shapeNode = dataNode.Clone();
if (shapeNode.HasChildren) {
shapeNode.MoveToChild(XPathNodeType.All);
shapeNode.MoveToChild(XPathNodeType.All);
do {
switch (shapeNode.Name) {
case "y:Fill":
break;
case "y:NodeLabel":
label = shapeNode.Clone();
break;
case "y:BorderStyle":
break;
case "y:Shape":
shape = shapeNode.Clone();
break;
}
} while (shapeNode.MoveToNext());
Trace.WriteLine(string.Empty);
if (shape != null) {
shape.MoveToFirstAttribute();
}
if (shape != null) {
type = shape.Value;
}
if (label != null) {
contents = label.Value;
}
}
} catch (NullReferenceException exception) {
this.log.Error(
errorMessage =>
errorMessage("ProcessFile() and error occured processing file ({1}) {0}", exception, filename));
}
}
} while (dataNodes.MoveToNext());
}
} while (node.MoveToNext());
try {
int stateId;
switch (type) {
case "rectangle": // page state
IState pageNode = this.CreatePageState(out stateId, contents);
if (states.ContainsKey(pageNode.Id)) {
throw new ApplicationException(string.Format("Page State ({0})already exists.", pageNode.Id));
}
states[pageNode.Id] = pageNode;
transitionLookup[nodeId] = stateId;
break;
case "octagon": // stop state
IState stopNode = this.CreateStopState(out stateId, contents);
if (states.ContainsKey(stopNode.Id)) {
throw new ApplicationException(string.Format("Stop State ({0})already exists.", stopNode.Id));
}
states[stopNode.Id] = stopNode;
transitionLookup[nodeId] = stateId;
break;
case "roundrectangle": // action state
IState actionNode = this.CreateActionState(out stateId, contents);
if (states.ContainsKey(actionNode.Id)) {
throw new ApplicationException(string.Format("Action State ({0})already exists.", actionNode.Id));
}
states[actionNode.Id] = actionNode;
transitionLookup[nodeId] = stateId;
break;
case "ellipse": // connector
transitionLookup[nodeId] = int.Parse(contents);
break;
case "diamond": // prerequisite definitions are handled in PreProcessGraphmlFile
break;
case "parallelogram":
string transitionGroupName = string.Empty;
string[] split = contents.Split('\n');
NameValueCollection nodeContents = this.ProcessContent(split);
if (nodeContents[NAME_ATTRIBUTE] == null) {
transitionGroupName = split[0];
}
Dictionary<string, long> tranGroup = new Dictionary<string, long>();
try {
transitionGroupLookup[nodeId] = transitionGroupName;
transitionGroupLookup[transitionGroupName] = nodeId;
tranGroup = transitionGroups[transitionGroupName];
} catch {
transitionGroups.Add(transitionGroupName, tranGroup);
}
break;
default:
break;
}
} catch (ApplicationException ex) {
this.log.Warn(warn => warn("The was an error processing node {0} : {1}.", nodeId, ex.ToString()));
} catch (Exception ex) {
throw new ApplicationException("A fatal error has occured. Could not load states.", ex);
}
}
// process all the edges
foreach (XPathNavigator edge in edges) {
string transitions = string.Empty;
string fromNodeId = string.Empty;
string toNodeId = string.Empty;
XPathNavigator graphAttr = edge.Clone();
graphAttr.MoveToFirstAttribute();
do {
switch (graphAttr.Name) {
case "source":
fromNodeId = graphAttr.Value;
break;
case "target":
toNodeId = graphAttr.Value;
break;
}
} while (graphAttr.MoveToNextAttribute());
// find the y:PolyLineEdge node
XPathNavigator dataNodes = edge.Clone();
dataNodes.MoveToChild(XPathNodeType.All);
do {
if ((dataNodes.Name == "data") && dataNodes.HasAttributes && dataNodes.HasChildren) {
string key = dataNodes.GetAttribute("key", string.Empty);
if (!string.IsNullOrEmpty(key) && key.StartsWith("d")) {
XPathNavigator dataNode = dataNodes.Clone();
dataNode.MoveToChild(XPathNodeType.All);
dataNode.MoveToChild(XPathNodeType.All);
do {
switch (dataNode.Name) {
case "y:EdgeLabel":
// get the attributes
transitions += edge.Value;
break;
}
} while (dataNode.MoveToNext());
}
}
} while (dataNodes.MoveToNext());
// process the info
int fromStateId = int.MinValue;
if (transitionLookup.ContainsKey(fromNodeId)) {
fromStateId = transitionLookup[fromNodeId];
} else {
this.log.Error(error => error("Unable to locate transition node from node id {0}.", fromNodeId));
}
if (transitionGroupLookup.ContainsKey(toNodeId)) {
string[] edgecontents = transitionGroupLookup[toNodeId].Split('\n');
string[] transitionSplit = transitions.Split('\n');
foreach (string transition in transitionSplit) {
if (transition == "transitionGroup") {
// add this to a list of transition for a state
// to be filled later
//NameValueCollection content = this.ProcessContent(edgecontents);
foreach (string key in edgecontents) {
List<string> transitionGroupList = new List<string>();
try {
transitionGroupList = stateTransitionGroups[fromStateId];
} catch {
if (!stateTransitionGroups.ContainsKey(fromStateId)) {
stateTransitionGroups.Add(fromStateId, transitionGroupList);
}
}
if (!transitionGroupList.Contains(key)) {
transitionGroupList.Add(key);
}
}
}
}
// this must be a transitionGroups transition
} else if (transitionGroupLookup.ContainsKey(fromNodeId)) {
string transitionGroupName = transitionGroupLookup[fromNodeId];
//string transitionGroupNodeId = transitionGroupLookup[transitionGroupName];
string[] transitionSplit = transitions.ToLower().Split('\n');
foreach (string transition in transitionSplit) {
if (transitionGroups.ContainsKey(transitionGroupName)) {
Dictionary<string, long> transitionGroup = transitionGroups[transitionGroupName];
// add this transition to the transitionGroup
int toStateId = transitionLookup[toNodeId];
if (!transitionGroup.ContainsKey(transition)) {
transitionGroup.Add(transition, Convert.ToInt64(toStateId));
} else {
this.log.Info(info => info("Transition '{0}' already exists for TransitionGroup '{1}'", transition, transitionGroupName));
}
} else {
// need to log something
this.log.Info(info => info("Cannot locate transition group '{0}' while processing Edge", transitionGroupName));
}
}
} else {
if (transitionLookup.ContainsKey(toNodeId)) {
int toStateId = transitionLookup[toNodeId];
string[] transitionSplit = transitions.ToLower().Split('\n');
// Temporary, finish then see if this was the best way to do this before merging into the core proper.
List<string> contentProviderCheck = transitionSplit.ToList();
string contentProvider = contentProviderCheck.Find(x => x.Contains("contentprovider:"));
string providerType = null;
if (!string.IsNullOrEmpty(contentProvider)) {
providerType = contentProvider.Replace("contentprovider:", "");
providerType = providerType.Trim();
this.log.Info(info => info("Created transition with a content provider."));
contentProviderCheck.Remove(contentProvider);
}
foreach (string transition in contentProviderCheck) {
if (fromStateId > 0 && toStateId > 0) {
try {
Transition trans = new Transition(fromStateId, toStateId, transition, null, providerType);
((BaseState)states[fromStateId]).AddTransition(trans);
} catch (Exception) {
this.log.Error(error => error("Error Adding Transition to State ({0} -> {1} -> ({2}))", fromStateId, transition, toStateId));
}
}
}
} else {
this.log.Info(info => info("Unable to locate transition to node {0} in transition {1}", toNodeId, transitions));
}
}
}
nav.MoveToChild(XPathNodeType.All);
nav.MoveToChild(XPathNodeType.All);
}
