void applyDedupBijectionStrategy(final Traversal traversal) {
final TraversalStrategies strategies = new DefaultTraversalStrategies();
strategies.addStrategies(
FilterRankingStrategy.instance(), IdentityRemovalStrategy.instance());
traversal.asAdmin().setStrategies(strategies);
traversal.asAdmin().setEngine(this.traversalEngine);
traversal.asAdmin().applyStrategies();
}
@Override
@SuppressWarnings({"unchecked", "varargs"})
public TraversalStrategies addStrategies(final TraversalStrategy<?>... strategies) {
final Class<? extends TraversalStrategy>[] classes = new Class[strategies.length];
for (int i = 0; i < strategies.length; i++) {
classes[i] = strategies[i].getClass();
}
this.removeStrategies(classes); // todo: do a remove with no sort
Collections.addAll(this.traversalStrategies, strategies);
this.traversalStrategies = TraversalStrategies.sortStrategies(this.traversalStrategies);
return this;
}
@Override
public TraversalStrategies addStrategies(final TraversalStrategy<?>... strategies) {
boolean added = false;
for (final TraversalStrategy strategy : strategies) {
if (!this.traversalStrategies.contains(strategy)) {
this.traversalStrategies.add(strategy);
added = true;
}
}
if (added)
this.traversalStrategies = TraversalStrategies.sortStrategies(this.traversalStrategies);
return this;
}
@SuppressWarnings("unchecked")
@Override
public TraversalStrategies removeStrategies(
final Class<? extends TraversalStrategy>... strategyClasses) {
boolean removed = false;
for (final Class<? extends TraversalStrategy> strategyClass : strategyClasses) {
final Optional<TraversalStrategy<?>> strategy =
this.traversalStrategies
.stream()
.filter(s -> s.getClass().equals(strategyClass))
.findAny();
if (strategy.isPresent()) {
this.traversalStrategies.remove(strategy.get());
removed = true;
}
}
if (removed)
this.traversalStrategies = TraversalStrategies.sortStrategies(this.traversalStrategies);
return this;
}