public void AreIntersecting()
{
ArrayList a1 = new ArrayList();
a1.Add("a");
a1.Add(1);
a1.Add(3.14);
ArrayList a2 = new ArrayList();
a2.Add("b");
a2.Add(1);
a2.Add(6.28);
ArrayList a3 = new ArrayList();
a3.Add("c");
a3.Add(2);
a3.Add(9.42);
Assert.IsTrue(Misc.AreIntersecting(a1, a2), "Intersecting");
Assert.IsFalse(Misc.AreIntersecting(a1, a3), "Not-Intersecting");
}
private void InferUntilNoNewFact(ArrayList positiveImplications)
{
long iniTime;
if (HasLogListener)
{
ForceDispatchLog("(Starting) " +
((WM.Type == WorkingMemoryTypes.Global)?"Global":"Isolated") +
"Working Memory contains: " +
WM.FB.Count + " facts, " +
IB.Count + " implications, " +
QB.Count + " queries.",
LogEventImpl.DEBUG);
}
iniTime = DateTime.Now.Ticks;
ArrayList iterationPositiveImplications = null;
bool iterate = true;
Agenda agenda = new Agenda();
// Loop as long as there are new deduction made
while (iterate)
{
if (iteration >= IterationLimit)
{
throw new BREException("Maximum limit of iterations reached: " + IterationLimit);
}
iterate = false;
iteration++;
// Schedule all implications matching the existing facts
agenda.Schedule(iterationPositiveImplications, IB);
agenda.PrepareExecution();
if (HasLogListener)
{
ForceDispatchLog("Iteration #" +
iteration +
": " +
agenda.Count + " implications in agenda, with " +
positiveImplications.Count + " positive.",
LogEventImpl.DEBUG);
}
iterationPositiveImplications = new ArrayList();
while (agenda.HasMoreToExecute)
{
Implication firedImplication = agenda.NextToExecute;
// check if this implication is worth processing:
// first: see if it is not mutexed by a previously positive implication
if ((firedImplication.MutexChain != null) &&
(!positiveImplications.Contains(firedImplication)) &&
(Misc.AreIntersecting(firedImplication.MutexChain, positiveImplications)))
{
if (HasLogListener)
{
ForceDispatchLog("Mutexed: " + firedImplication.Label, LogEventImpl.DEBUG);
}
firedImplication = null;
}
// second: see if it is not pre-condition disabled by a previously negative implication
if ((firedImplication != null) &&
(firedImplication.PreconditionImplication != null) &&
(!positiveImplications.Contains(firedImplication.PreconditionImplication)))
{
if (HasLogListener)
{
ForceDispatchLog("Negative Precondition: " + firedImplication.Label, LogEventImpl.DEBUG);
}
firedImplication = null;
}
if (firedImplication != null)
{
WM.FB.ModifiedFlag = false;
int resultsCount = RunImplication(firedImplication);
if (HasLogListener)
{
ForceDispatchLog("Fired Implication: " +
firedImplication.ToString() +
" returned: " +
resultsCount,
LogEventImpl.DEBUG);
}
// if processor has been positive, i.e an implication deducted at least one fact
if (resultsCount > 0)
{
positiveImplications.Add(firedImplication);
}
// if the fact base has been anyhow modified
if (WM.FB.ModifiedFlag)
{
iterationPositiveImplications.Add(firedImplication);
}
}
} // while agenda has more
// if at least one is accepted ask for another processing iteration
iterate = (iterationPositiveImplications.Count > 0);
} // while iterate
// perform integrity checks
foreach (Query integrityQuery in IntegrityQueries)
{
QueryResultSet qrs = RunQuery(integrityQuery);
if (qrs.Count == 0)
{
throw new IntegrityException("Rulebase integrity violated: " + integrityQuery.Label);
}
}
if (HasLogListener)
{
ForceDispatchLog("NxBRE Inference Engine Execution Time: " +
(long)(DateTime.Now.Ticks - iniTime) / 10000 +
" milliseconds", LogEventImpl.INFO);
}
if (HasLogListener)
{
ForceDispatchLog("(Finishing) " +
((WM.Type == WorkingMemoryTypes.Global)?"Global":"Isolated") +
"Working Memory contains: " +
WM.FB.Count + " facts, " +
IB.Count + " implications, " +
QB.Count + " queries.",
LogEventImpl.DEBUG);
}
}