/// <summary>
/// Reads the definition for a node, and adds it to the given agent group
/// </summary>
/// <param name="Element">Xml element to read the definition from</param>
/// <param name="Group">Group for the node to be added to</param>
/// <param name="ControllingTrigger">The controlling trigger for this node</param>
void ReadNode(ScriptElement Element, AgentGroup Group, ManualTrigger ControllingTrigger)
{
string Name;
if (EvaluateCondition(Element) && TryReadObjectName(Element, out Name))
{
string[] RequiresNames = ReadListAttribute(Element, "Requires");
string[] ProducesNames = ReadListAttribute(Element, "Produces");
string[] AfterNames = ReadListAttribute(Element, "After");
// Resolve all the inputs we depend on
HashSet <NodeOutput> Inputs = ResolveInputReferences(Element, RequiresNames);
// Gather up all the input dependencies, and check they're all upstream of the current node
HashSet <Node> InputDependencies = new HashSet <Node>();
foreach (Node InputDependency in Inputs.Select(x => x.ProducingNode).Distinct())
{
if (InputDependency.ControllingTrigger != null && InputDependency.ControllingTrigger != ControllingTrigger && !InputDependency.ControllingTrigger.IsUpstreamFrom(ControllingTrigger))
{
LogError(Element, "'{0}' is dependent on '{1}', which is behind a different controlling trigger ({2})", Name, InputDependency.Name, InputDependency.ControllingTrigger.QualifiedName);
}
else
{
InputDependencies.Add(InputDependency);
}
}
// Recursively include all their dependencies too
foreach (Node InputDependency in InputDependencies.ToArray())
{
InputDependencies.UnionWith(InputDependency.InputDependencies);
}
// Add the name of the node itself to the list of outputs.
List <string> OutputNames = new List <string>();
foreach (string ProducesName in ProducesNames)
{
if (ProducesName.StartsWith("#"))
{
OutputNames.Add(ProducesName.Substring(1));
}
else
{
LogError(Element, "Output tag names must begin with a '#' character ('{0}')", ProducesName);
}
}
OutputNames.Add(Name);
// Gather up all the order dependencies
HashSet <Node> OrderDependencies = new HashSet <Node>(InputDependencies);
OrderDependencies.UnionWith(ResolveReferences(Element, AfterNames));
// Recursively include all their order dependencies too
foreach (Node OrderDependency in OrderDependencies.ToArray())
{
OrderDependencies.UnionWith(OrderDependency.OrderDependencies);
}
// Check that we're not dependent on anything completing that is declared after the initial declaration of this group.
int GroupIdx = Graph.Groups.IndexOf(Group);
for (int Idx = GroupIdx + 1; Idx < Graph.Groups.Count; Idx++)
{
foreach (Node Node in Graph.Groups[Idx].Nodes.Where(x => OrderDependencies.Contains(x)))
{
LogError(Element, "Node '{0}' has a dependency on '{1}', which was declared after the initial definition of '{2}'.", Name, Node.Name, Group.Name);
}
}
// Construct and register the node
if (CheckNameIsUnique(Element, Name))
{
// Add it to the node lookup
Node NewNode = new Node(Name, Inputs.ToArray(), OutputNames.ToArray(), InputDependencies.ToArray(), OrderDependencies.ToArray(), ControllingTrigger);
Graph.NameToNode.Add(Name, NewNode);
// Register each of the outputs as a reference to this node
foreach (NodeOutput Output in NewNode.Outputs)
{
if (Output.Name == Name || CheckNameIsUnique(Element, Output.Name))
{
Graph.NameToNodeOutput.Add(Output.Name, Output);
}
}
// Add all the tasks
EnterScope();
foreach (ScriptElement ChildElement in Element.ChildNodes.OfType <ScriptElement>())
{
switch (ChildElement.Name)
{
case "Property":
ReadProperty(ChildElement);
break;
case "Local":
ReadLocalProperty(ChildElement);
break;
case "Warning":
ReadDiagnostic(ChildElement, LogEventType.Warning, NewNode, Group, ControllingTrigger);
break;
case "Error":
ReadDiagnostic(ChildElement, LogEventType.Error, NewNode, Group, ControllingTrigger);
break;
default:
ReadTask(ChildElement, NewNode.Tasks);
break;
}
}
LeaveScope();
// Add it to the current agent group
Group.Nodes.Add(NewNode);
}
}
}
/// <summary>
/// Reads a warning from the given element, evaluates the condition on it, and writes it to the log if the condition passes.
/// </summary>
/// <param name="Element">Xml element to read the definition from</param>
/// <param name="EventType">The diagnostic event type</param>
/// <param name="EnclosingObject">The enclosing object instance</param>
void ReadDiagnostic(ScriptElement Element, LogEventType EventType, Node EnclosingNode, AgentGroup EnclosingGroup, ManualTrigger EnclosingTrigger)
{
if (EvaluateCondition(Element))
{
string Message = ReadAttribute(Element, "Message");
GraphDiagnostic Diagnostic = new GraphDiagnostic();
Diagnostic.EventType = EventType;
Diagnostic.Message = String.Format("{0}({1}): {2}", Element.File.FullName, Element.LineNumber, Message);
Diagnostic.EnclosingNode = EnclosingNode;
Diagnostic.EnclosingGroup = EnclosingGroup;
Diagnostic.EnclosingTrigger = EnclosingTrigger;
Graph.Diagnostics.Add(Diagnostic);
}
}
/// <summary>
/// Reads the definition for an agent group.
/// </summary>
/// <param name="Element">Xml element to read the definition from</param>
/// <param name="Trigger">The controlling trigger for nodes in this group</param>
void ReadAgent(ScriptElement Element, ManualTrigger Trigger)
{
string Name;
if (EvaluateCondition(Element) && TryReadObjectName(Element, out Name))
{
// Read the valid agent types. This may be omitted if we're continuing an existing group.
string[] Types = ReadListAttribute(Element, "Type");
// Create the group object, or continue an existing one
AgentGroup Group;
if (NameToGroup.TryGetValue(Name, out Group))
{
if (Types.Length > 0 && Group.PossibleTypes.Length > 0)
{
string[] NewTypes = Group.PossibleTypes.Intersect(Types, StringComparer.InvariantCultureIgnoreCase).ToArray();
if (NewTypes.Length == 0)
{
LogError(Element, "No common agent types with previous agent definition");
}
Group.PossibleTypes = NewTypes;
}
}
else
{
if (Types.Length == 0)
{
LogError(Element, "Missing agent type for group '{0}'", Name);
}
Group = new AgentGroup(Name, Types);
NameToGroup.Add(Name, Group);
Graph.Groups.Add(Group);
}
// Process all the child elements.
EnterScope();
foreach (ScriptElement ChildElement in Element.ChildNodes.OfType <ScriptElement>())
{
switch (ChildElement.Name)
{
case "Property":
ReadProperty(ChildElement);
break;
case "Local":
ReadLocalProperty(ChildElement);
break;
case "Node":
ReadNode(ChildElement, Group, Trigger);
break;
case "Aggregate":
ReadAggregate(ChildElement);
break;
case "Warning":
ReadDiagnostic(ChildElement, LogEventType.Warning, null, Group, Trigger);
break;
case "Error":
ReadDiagnostic(ChildElement, LogEventType.Error, null, Group, Trigger);
break;
default:
LogError(ChildElement, "Unexpected element type '{0}'", ChildElement.Name);
break;
}
}
LeaveScope();
}
}