Examples with PropertiesStep org.apache.tinkerpop.gremlin.process.traversal.step.map.PropertiesStep used on opensource projects

Example 6 with PropertiesStep

use of org.apache.tinkerpop.gremlin.process.traversal.step.map.PropertiesStep in project janusgraph by JanusGraph.

the class HasStepFolder method foldInHasFilter.

/**
 * Convert a TraversalFilterStep that is essentially "has(key)" into a normal HasStep
 * @param traversal local traversal
 * @param currentStep
 */
static Step foldInHasFilter(final Traversal.Admin<?, ?> traversal, final TraversalFilterStep<?> currentStep) {
    List<? extends Traversal.Admin<?, ?>> traversals = currentStep.getLocalChildren();
    assert (traversals.size() == 1);
    List<Step> steps = traversals.get(0).getSteps();
    assert (steps.size() == 1 && steps.get(0) instanceof PropertiesStep);
    String[] propertyKeys = ((PropertiesStep) steps.get(0)).getPropertyKeys();
    assert (propertyKeys.length == 1);
    HasStep hasStep = new HasStep(traversal, new HasContainer(propertyKeys[0], P.neq(null)));
    currentStep.getLabels().forEach(hasStep::addLabel);
    TraversalHelper.replaceStep(currentStep, hasStep, traversal);
    return hasStep;
}