private Predicates getPredicates(Step step, Traversal.Admin traversal) {
Predicates predicates = new Predicates();
Step<?, ?> nextStep = step.getNextStep();
while (true) {
if (nextStep instanceof HasContainerHolder) {
HasContainerHolder hasContainerHolder = (HasContainerHolder) nextStep;
boolean skip = false;
for (HasContainer has : hasContainerHolder.getHasContainers())
if (has.getPredicate().getTraversals().size() > 0) skip = true;
if (!skip) {
hasContainerHolder.getHasContainers().forEach((has) -> predicates.hasContainers.add(has));
nextStep.getLabels().forEach(label -> predicates.labels.add(label.toString()));
traversal.removeStep(nextStep);
}
} else if (nextStep instanceof RangeGlobalStep) {
RangeGlobalStep rangeGlobalStep = (RangeGlobalStep) nextStep;
predicates.limitLow = rangeGlobalStep.getLowRange();
predicates.limitHigh = rangeGlobalStep.getHighRange();
traversal.removeStep(nextStep);
} else return predicates;
nextStep = nextStep.getNextStep();
}
}
/**
* Replace a step with a new step.
*
* @param removeStep the step to remove
* @param insertStep the step to insert
* @param traversal the traversal on which the action will occur
*/
public static <S, E> void replaceStep(
final Step<S, E> removeStep,
final Step<S, E> insertStep,
final Traversal.Admin<?, ?> traversal) {
traversal.addStep(stepIndex(removeStep, traversal), insertStep);
traversal.removeStep(removeStep);
}
public static <S, E> void removeToTraversal(
final Step<S, ?> startStep,
final Step<?, E> endStep,
final Traversal.Admin<S, E> newTraversal) {
final Traversal.Admin<?, ?> originalTraversal = startStep.getTraversal();
Step<?, ?> currentStep = startStep;
while (currentStep != endStep && !(currentStep instanceof EmptyStep)) {
final Step<?, ?> temp = currentStep.getNextStep();
originalTraversal.removeStep(currentStep);
newTraversal.addStep(currentStep);
currentStep = temp;
}
}
