private NodeToken backtrackCompletedToken(
final NodeToken token, final ExecutionType executionType) {
token.markBacktracked();
NodeTokenEvent.fireBacktrackedEvent(engine, token);
List<ArcToken> parents = new ArrayList<ArcToken>(token.getChildTokens().size());
for (ArcToken childToken : token.getChildTokens()) {
ArcToken parent = arcTokenMap.get(childToken);
if (parent == null) {
throw new RuntimeException("No backtrack found for: " + childToken);
}
parents.add(parent);
}
NodeToken backtrackToken =
engine
.getFactory()
.newNodeToken(token.getProcess(), token.getNode(), executionType, parents, token);
NodeTokenEvent.fireCreatedEvent(engine, backtrackToken);
token.getProcess().addNodeToken(backtrackToken);
shareTokenSets(backtrackToken, token);
for (ArcToken parent : parents) {
token.getProcess().removeActiveArcToken(parent);
parent.markBacktracked();
ArcTokenEvent.fireBacktrackedEvent(engine, parent);
parent.markComplete(backtrackToken);
ArcTokenEvent.fireCompletedEvent(engine, parent);
}
return backtrackToken;
}
public NodeToken backtrackDeadEnd(final NodeToken token) {
token.markBacktracked();
NodeTokenEvent.fireBacktrackedEvent(engine, token);
List<ArcToken> parents = new ArrayList<ArcToken>(token.getParentTokens().size());
for (ArcToken parent : token.getParentTokens()) {
parent.markBacktracked();
ArcTokenEvent.fireBacktrackedEvent(engine, parent);
ArcToken backtrackArcToken =
engine
.getFactory()
.newArcToken(token.getProcess(), parent.getArc(), ExecutionType.UTurn, token);
ArcTokenEvent.fireCreatedEvent(engine, backtrackArcToken);
token.getChildTokens().add(backtrackArcToken);
parents.add(backtrackArcToken);
shareTokenSets(backtrackArcToken, parent);
}
NodeToken backtrackToken =
engine
.getFactory()
.newNodeToken(
token.getProcess(), token.getNode(), ExecutionType.Forward, parents, token);
NodeTokenEvent.fireCreatedEvent(engine, backtrackToken);
token.getProcess().addNodeToken(backtrackToken);
shareTokenSets(backtrackToken, token);
for (ArcToken parent : parents) {
parent.markProcessed();
ArcTokenEvent.fireProcessedEvent(engine, parent);
parent.markComplete(backtrackToken);
ArcTokenEvent.fireCompletedEvent(engine, parent);
}
reactivateTokenSets();
return backtrackToken;
}