private void ConfigureState(PreloadMachineState state, IStateMachineClient client)
{
ConfigureStateEvents(state);
_statesMap.Add(state, client);
}
/// <summary>
/// The bool SetStatus method gets the next valid state given the current state and the supplied input.
/// </summary>
/// <param name="currentStateID">The current status.</param>
/// <returns>A int that identifies the next state</returns>
public int SetStatus(Stream stateTable, int currentStateID, int eventID, IStateMachineClient client)
{
XmlTextReader tableParser = null;
int nextState = 0;
bool hitState = false;
bool hitEvent = false;
string clientResult = string.Empty;
if (currentStateID != 0 && eventID != 0)
{
try
{
tableParser = new XmlTextReader(stateTable);
if (tableParser == null)
throw new ApplicationException("The XMLStateMachine was not initialised with a stream");
while (tableParser.Read() && !hitState)
{
if (tableParser.NodeType == XmlNodeType.Element && tableParser.Name == "state")
{
if ( tableParser.HasAttributes )
{
int state = int.Parse(tableParser.GetAttribute("id"));
if ( state == currentStateID )
{
hitState = true;
XmlReader eventData = tableParser.ReadSubtree();
// Get event data
while (eventData.Read() && !hitEvent)
{
if (eventData.NodeType == XmlNodeType.Element && eventData.Name == "event")
{
if (eventData.HasAttributes)
{
int nodeEventID = int.Parse(eventData.GetAttribute("id"));
if (nodeEventID == eventID)
{
hitEvent = true;
// Is there a condition
if (eventData.GetAttribute("condition") != null)
{
int nodeConditionID = int.Parse(eventData.GetAttribute("condition"));
clientResult = client.CheckCondition(nodeConditionID);
}
// Get transition data
XmlReader transitionData = eventData.ReadSubtree();
while (transitionData.Read())
{
if (transitionData.NodeType == XmlNodeType.Element && transitionData.Name == "transition")
{
if (transitionData.HasAttributes)
{
string nodeResult = transitionData.GetAttribute("result");
if (nodeResult.Equals(clientResult, StringComparison.OrdinalIgnoreCase))
{
nextState = int.Parse(transitionData.GetAttribute("next"));
if (transitionData.GetAttribute("action") != null)
{
int action = int.Parse(transitionData.GetAttribute("action"));
if (client.RunAction(action))
return nextState;
}
else
return nextState;
}
}
}
}
}
}
}
}
}
}
}
}
}
catch (XmlException e)
{
// Eliminate default trace listener
Trace.Listeners.RemoveAt(0);
// Add console trace listener
TextWriterTraceListener myWriter = new TextWriterTraceListener(System.Console.Out);
Trace.Listeners.Add(myWriter);
Trace.WriteLine("[XMLStateMachine] Could not load state table definition.");
Trace.Indent();
Trace.WriteLine(e.Message);
Trace.Unindent();
// Clean up object
if (tableParser != null)
tableParser.Close();
}
}
return nextState;
}
