internal ImplicationStep(WildcardTriplet implicationCondition, TripletTree implicationResult, WildcardTriplet target, Context context)
: base(target, context)
{
_conditionReader = CreateRequirement(implicationCondition);
_implicationResult = implicationResult;
_conditionReader.AttachHandler(_handler_Condition);
}
internal AndStep(WildcardTriplet condition1, WildcardTriplet condition2, WildcardTriplet target, Context context)
: base(target, context)
{
_reader1 = CreateRequirement(condition1);
_reader2 = CreateRequirement(condition2);
_reader1.AttachHandler(reader1_Handler);
_reader2.AttachHandler(reader2_Handler);
}
/// <summary>
/// Handler for received triplet on given reader.
/// </summary>
/// <param name="receivedTriplet">Triplet which was received.</param>
/// <param name="handledReader">The reader to handle.</param>
private void reader_Handler(TripletTree receivedTriplet, TripletTreeReader handledReader)
{
var otherReader = handledReader == _reader1 ? _reader2 : _reader1;
var generateReverseOrder = handledReader == _reader2;
var substitutions = handledReader.Condition.GetSubstitutionMapping(receivedTriplet);
var otherConditionRequest = substitutions.Substitute(otherReader.Condition);
foreach (var substitutedRequestedTriplet in otherReader.RequestSubstituted(otherConditionRequest))
{
var mapping = otherConditionRequest.GetSubstitutionMapping(substitutedRequestedTriplet);
var substitutedReceivedTriplet = mapping.Substitute(receivedTriplet);
if (generateReverseOrder)
Produce(TripletTree.From(substitutedRequestedTriplet, Predicate.And, substitutedReceivedTriplet));
else
Produce(TripletTree.From(substitutedReceivedTriplet, Predicate.And, substitutedRequestedTriplet));
}
}
internal TripletTreeReader GetReader(WildcardTriplet wildcard, TripletTreeReaderEvent handler = null)
{
TripletTreeReader reader;
if (!_wildcardReaders.TryGetValue(wildcard, out reader))
_wildcardReaders[wildcard] = reader = new TripletTreeReader(wildcard);
if (handler != null)
reader.AttachHandler(handler);
return reader;
}