private IAggregator CreateAggregator(Tuple tuple)
{
var aggregator = _aggregatorFactory.Create();
tuple.SetState(this, aggregator);
return(aggregator);
}
public static Quantifier CreateQuantifier(this Tuple tuple, INode node)
{
var quantifier = new Quantifier();
tuple.SetState(node, quantifier);
return(quantifier);
}
private IFactAggregator CreateFactAggregator(Tuple tuple)
{
var aggregator = _aggregatorFactory.Create();
var factAggregator = new FactAggregator(aggregator);
tuple.SetState(this, factAggregator);
return(factAggregator);
}
private IAggregator CreateAggregator(IExecutionContext context, Tuple tuple)
{
var aggregator = _aggregatorFactory.Create();
tuple.SetState(this, aggregator);
var results = aggregator.Initial();
HandleAggregationResult(context, results, tuple);
return(aggregator);
}
private IAggregate GetAggregate(Tuple tuple)
{
var aggregate = tuple.GetState <IAggregate>();
if (aggregate == null)
{
aggregate = _aggregateFactory();
tuple.SetState(aggregate);
}
return(aggregate);
}
private void AssertBinding(IExecutionContext context, Tuple tuple, TupleFactList toAssert)
{
try
{
var value = BindingExpression.Invoke(context, NodeInfo, tuple);
var fact = new Fact(value, ResultType);
tuple.SetState(this, fact);
toAssert.Add(tuple, fact);
}
catch (ExpressionEvaluationException e)
{
if (!e.IsHandled)
{
throw new RuleLhsExpressionEvaluationException("Failed to evaluate binding expression",
e.Expression.ToString(), e.InnerException);
}
}
}
private void AssertBinding(IExecutionContext context, Tuple tuple, TupleFactList toAssert)
{
try
{
var value = BindingExpression.Invoke(tuple);
var fact = new Fact(value, ResultType);
tuple.SetState(this, fact);
toAssert.Add(tuple, fact);
}
catch (Exception e)
{
bool isHandled = false;
context.EventAggregator.RaiseBindingFailed(context.Session, e, BindingExpression.Expression, tuple, ref isHandled);
if (!isHandled)
{
throw new RuleExpressionEvaluationException("Failed to evaluate binding expression",
BindingExpression.Expression.ToString(), e);
}
}
}
