protected override void VisitAggregate(ReteBuilderContext context, AggregateElement element)
{
BuildSubnet(context, element.Source);
var betaNode = new AggregateNode(context.BetaSource, context.AlphaSource, element.AggregateType);
if (context.HasSubnet)
{
betaNode.Conditions.Add(new SubnetCondition());
}
context.BetaSource = BuildBetaMemoryNode(context, betaNode);
context.ResetAlphaSource();
}
private void BuildAggregateNode(ReteBuilderContext context, AggregateElement element)
{
var node = context.AlphaSource
.Sinks.OfType <AggregateNode>()
.FirstOrDefault(x =>
x.RightSource == context.AlphaSource &&
x.LeftSource == context.BetaSource &&
x.Name == element.Name &&
ExpressionElementComparer.AreEqual(x.Expressions, element.Expressions));
if (node == null)
{
var aggregatorFactory = BuildAggregatorFactory(context, element);
node = new AggregateNode(context.BetaSource, context.AlphaSource, element.Name,
element.Expressions, aggregatorFactory, context.HasSubnet);
}
node.NodeInfo.Add(context.Rule, element);
BuildBetaMemoryNode(context, node);
context.ResetAlphaSource();
}
private void BuildAggregateNode(ReteBuilderContext context, Type aggregateType)
{
var node = context.AlphaSource
.Sinks.OfType <AggregateNode>()
.FirstOrDefault(x =>
x.RightSource == context.AlphaSource &&
x.LeftSource == context.BetaSource &&
x.AggregateType == aggregateType);
if (node == null)
{
node = new AggregateNode(context.BetaSource, context.AlphaSource, aggregateType);
if (context.HasSubnet)
{
node.Conditions.Insert(0, new SubnetCondition());
}
}
BuildBetaMemoryNode(context, node);
context.ResetAlphaSource();
}
private void BuildAggregateNode(ReteBuilderContext context, AggregateElement element)
{
var node = context.AlphaSource
.Sinks.OfType <AggregateNode>()
.FirstOrDefault(x =>
x.RightSource == context.AlphaSource &&
x.LeftSource == context.BetaSource &&
x.Name == element.Name &&
ExpressionMapComparer.AreEqual(x.ExpressionMap, element.ExpressionMap));
if (node == null)
{
node = new AggregateNode(context.BetaSource, context.AlphaSource, element.Name, element.ExpressionMap, element.AggregatorFactory);
if (context.HasSubnet)
{
node.Conditions.Insert(0, new SubnetCondition());
}
}
BuildBetaMemoryNode(context, node);
context.ResetAlphaSource();
}
