/// <summary>
/// Make an observer instance.
/// </summary>
/// <param name="context">services that may be required by observer implementation</param>
/// <param name="beginState">start state for observer</param>
/// <param name="observerEventEvaluator">receiver for events observed</param>
/// <param name="stateNodeId">optional id for the associated pattern state node</param>
/// <param name="observerState">state node for observer</param>
/// <param name="isFilterChildNonQuitting">if set to <c>true</c> [is filter child non quitting].</param>
/// <returns>
/// observer instance
/// </returns>
/// <exception cref="System.NotImplementedException"></exception>
public abstract EventObserver MakeObserver(
PatternAgentInstanceContext context,
MatchedEventMap beginState,
ObserverEventEvaluator observerEventEvaluator,
EvalStateNodeNumber stateNodeId,
object observerState,
bool isFilterChildNonQuitting);
public Guard MakeGuard(PatternAgentInstanceContext context,
MatchedEventMap beginState,
Quitable quitable,
EvalStateNodeNumber stateNodeId,
Object guardState)
{
return(new TimerWithinOrMaxCountGuard(
ComputeMilliseconds(beginState, context), ComputeNumCountTo(beginState, context), quitable));
}
public Guard MakeGuard(
PatternAgentInstanceContext context,
MatchedEventMap matchedEventMap,
Quitable quitable,
EvalStateNodeNumber stateNodeId,
Object guardState)
{
return(new TimerWithinGuard(ComputeTime(matchedEventMap, context), quitable));
}
public EventObserver MakeObserver(
PatternAgentInstanceContext context,
MatchedEventMap beginState,
ObserverEventEvaluator observerEventEvaluator,
EvalStateNodeNumber stateNodeId,
Object observerState,
bool isFilterChildNonQuitting)
{
return(new TimerAtObserver(ComputeSpec(beginState, context), beginState, observerEventEvaluator));
}
public EventObserver MakeObserver(
PatternAgentInstanceContext context,
MatchedEventMap beginState,
ObserverEventEvaluator observerEventEvaluator,
EvalStateNodeNumber stateNodeId,
Object observerState,
bool isFilterchildNonQuitting)
{
return(null);
}
public override EventObserver MakeObserver(
PatternAgentInstanceContext context,
MatchedEventMap beginState,
ObserverEventEvaluator observerEventEvaluator,
EvalStateNodeNumber stateNodeId,
Object observerState,
bool isFilterChildNonQuitting)
{
Object filename = PatternExpressionUtil.Evaluate(
"File-exists observer ", beginState, FilenameExpression, Convertor, null);
if (filename == null)
{
throw new EPException("Filename evaluated to null");
}
return(new MyFileExistsObserver(beginState, observerEventEvaluator, filename.ToString()));
}
public override EvalStateNode NewState(Evaluator parentNode, EvalStateNodeNumber stateNodeNumber, long stateNodeId)
{
return(new EvalOrStateNode(parentNode, this));
}
public Guard MakeGuard(PatternAgentInstanceContext context, MatchedEventMap beginState, Quitable quitable, EvalStateNodeNumber stateNodeId, Object guardState)
{
return(new ExpressionGuard(Convertor, Expression.ExprEvaluator, quitable));
}
/// <summary> /// Constructs a guard instance. /// </summary> /// <param name="context">services for use by guard</param> /// <param name="beginState">the prior matching events</param> /// <param name="quitable">to use for indicating the guard has quit</param> /// <param name="stateNodeId">a node id for the state object</param> /// <param name="guardState">state node for guard</param> /// <returns> /// guard instance /// </returns> public abstract Guard MakeGuard(PatternAgentInstanceContext context, MatchedEventMap beginState, Quitable quitable, EvalStateNodeNumber stateNodeId, object guardState);
public Guard MakeGuard(PatternAgentInstanceContext context, MatchedEventMap beginState, Quitable quitable, EvalStateNodeNumber stateNodeId, Object guardState)
{
return(null);
}
public override Guard MakeGuard(PatternAgentInstanceContext context, MatchedEventMap beginState, Quitable quitable, EvalStateNodeNumber stateNodeId, Object guardState)
{
Object parameter = PatternExpressionUtil.Evaluate("Count-to guard", beginState, _numCountToExpr, _convertor, null);
if (parameter == null)
{
throw new EPException("Count-to guard parameter evaluated to a null value");
}
int numCountTo = parameter.AsInt();
return(new MyCountToPatternGuard(numCountTo, quitable));
}
