/// <summary> if all the facts have not expired, the method returns true. If a fact has
/// expired, the method will retract the fact.
/// </summary>
/// <param name="">inx
/// </param>
/// <param name="">engine
/// </param>
/// <param name="">mem
/// </param>
/// <returns>
///
/// </returns>
protected internal virtual bool checkFacts(Index inx, Rete engine, IWorkingMemory mem)
{
IFact[] facts = inx.Facts;
bool fresh = true;
long current = (DateTime.Now.Ticks - 621355968000000000) / 10000;
for (int idx = 0; idx < facts.Length; idx++)
{
if (facts[idx] is ITemporalFact)
{
TemporalDeffact tf = (TemporalDeffact)facts[idx];
if (tf.ExpirationTime < current)
{
// the fact has expired
fresh = false;
try
{
engine.retractFact(tf);
}
catch (RetractException e)
{
// we do nothing
}
}
}
}
return(fresh);
}
public virtual IReturnVector executeFunction(Rete engine, IParameter[] params_Renamed)
{
DefaultReturnVector rv = new DefaultReturnVector();
if (params_Renamed != null && params_Renamed.Length >= 1)
{
for (int idx = 0; idx < params_Renamed.Length; idx++)
{
if (params_Renamed[idx] is BoundParam)
{
BoundParam bp = (BoundParam)params_Renamed[idx];
Deffact fact = (Deffact)bp.Fact;
try
{
if (bp.ObjectBinding)
{
engine.retractObject(fact.ObjectInstance);
}
else
{
engine.retractFact(fact);
}
DefaultReturnValue rval = new DefaultReturnValue(Constants.BOOLEAN_OBJECT, true);
rv.addReturnValue(rval);
}
catch (RetractException e)
{
DefaultReturnValue rval = new DefaultReturnValue(Constants.BOOLEAN_OBJECT, false);
rv.addReturnValue(rval);
}
}
else if (params_Renamed[idx] is ValueParam)
{
Decimal bi = params_Renamed[idx].BigDecimalValue;
try
{
engine.retractById(Decimal.ToInt64(bi));
DefaultReturnValue rval = new DefaultReturnValue(Constants.BOOLEAN_OBJECT, true);
rv.addReturnValue(rval);
}
catch (RetractException e)
{
DefaultReturnValue rval = new DefaultReturnValue(Constants.BOOLEAN_OBJECT, false);
rv.addReturnValue(rval);
}
}
}
}
return(rv);
}
public virtual IReturnVector executeFunction(Rete engine, IParameter[] params_Renamed)
{
bool exec = false;
if (engine != null && params_Renamed != null && params_Renamed.Length >= 2 && params_Renamed[0].ObjectBinding)
{
BoundParam bp = (BoundParam)params_Renamed[0];
Deffact fact = (Deffact)bp.Fact;
try
{
// first retract the fact
engine.retractFact(fact);
// now modify the fact
SlotParam[] sp = new SlotParam[params_Renamed.Length - 1];
for (int idx = 0; idx < sp.Length; idx++)
{
IParameter p = params_Renamed[idx + 1];
if (p is SlotParam)
{
sp[idx] = (SlotParam)p;
}
}
fact.updateSlots(engine, convertToSlots(sp, fact.Deftemplate));
if (fact.hasBinding())
{
fact.resolveValues(engine, triggerFacts);
fact = fact.cloneFact();
}
// now assert the fact using the same fact-id
engine.assertFact(fact);
exec = true;
}
catch (RetractException e)
{
engine.writeMessage(e.Message);
}
catch (AssertException e)
{
engine.writeMessage(e.Message);
}
}
DefaultReturnVector rv = new DefaultReturnVector();
DefaultReturnValue rval = new DefaultReturnValue(Constants.BOOLEAN_OBJECT, exec);
rv.addReturnValue(rval);
return(rv);
}
