private NodeMatchResult TryMatchNode <T>(MatchNodeArg <T> args) where T : class, INode
{
// handling remote edge
if (args.IsRemote && args.NodeToMatch is IRemoteNode)
{
return(HandleRemoteNode(args));
}
T typedNode = args.NodeToMatch as T;
if (typedNode != null &&
!args.PatternNode.IsMatched &&
args.Predicate(typedNode) &&
!this.pattern.GetMatchedNodes().Contains(typedNode) &&
CheckNeighbours(args.NodeToMatch, args.PatternNode))
{
args.MarkMatch();
if (this.IsRemote)
{
// when searching in a remote partition
// on match set up pattern node's remote edges
args.PatternNode.CopyRemoteEdgesFrom(typedNode);
}
return(new NodeMatchResult(true));
}
return(new NodeMatchResult(false));
}
protected override NodeMatchResult HandleRemoteNode <T>(MatchNodeArg <T> args)
{
// prepare pattern for remote partial search
Pattern pattern = this.pattern.Copy();
pattern.CurrentNode = args.NodeToMatch.Id;
pattern.CurrentPatternNodeName = args.PatternNode.Name;
this.State = PartialMatchState.Pending;
IPartialMatchResult result = null;
using (MatcherMetric.RegisterWaitTime("partial remote match"))
{
result = Framework.BeginFindPartialMatch(args.RemotePartitionId, pattern);
result.Wait();
}
bool matched = result.MatchedPattern.GetMatchedNodes().Count() > pattern.GetMatchedNodes().Count;
Pattern remotePattern = (Pattern)result.MatchedPattern;
this.pattern.Merge(remotePattern);
this.State = PartialMatchState.Running;
return(new NodeMatchResult(matched, remotePattern.MatchedFullSubpattern));
}
protected abstract NodeMatchResult HandleRemoteNode <T>(MatchNodeArg <T> args) where T : class, INode;
protected override NodeMatchResult HandleRemoteNode <T>(MatchNodeArg <T> args)
{
// always return false for remote node partial match
return(new NodeMatchResult(false));
}