public String descendants(RequirementGraph<Project> graph) {
if (next != null && next.contains(requirement)) return "!";
if (requirement == null) return "";
Project prerequisite = getPrerequsiteEvenIfExpired();
if (prerequisite == null) return "";
Collection<Requirement<Project>> requirements = finder.getRequirements(prerequisite, graph);
return " "
+ requirement.rightArrow(now)
+ " "
+ prerequisite
+ new DescendantAncestry(now, first(requirements), finder, this).descendants(graph);
}
private Cycle<Requirement<Project>> cycleFromOutgoingRequirements(
StatusInstant<Project> statusInstant) {
for (Requirement<Project> blocker :
finder.getRequirements(getPrerequisite(requirement), statusInstant.getGraph())) {
RequirementNode<Project> prerequisite = getPrerequisite(blocker);
if (prerequisite != null && !prerequisite.intrinsicallyInactionable(statusInstant)) {
Cycle<Requirement<Project>> cycle =
new DescendantAncestry(now, blocker, finder, this).findCycle(statusInstant);
if (cycle != null) return cycle;
}
}
return null;
}