| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.tinkerpop.gremlin.process.traversal.strategy.finalization; |
| |
| import org.apache.tinkerpop.gremlin.process.traversal.Step; |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalEngine; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalEngine.Type; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.EngineDependent; |
| import org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy; |
| |
| /** |
| * A {@link Step} can extend {@link EngineDependent}. If it does, that means that the steps internal logic is |
| * modulated by whether the execution is via {@link Type#STANDARD} or {@link Type#COMPUTER}. |
| * {@code EngineDependentStrategy} simply locates all engine dependent steps and provides the respective |
| * {@link TraversalEngine}. |
| * |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class EngineDependentStrategy extends AbstractTraversalStrategy<TraversalStrategy.FinalizationStrategy> |
| implements TraversalStrategy.FinalizationStrategy { |
| |
| private static final EngineDependentStrategy INSTANCE = new EngineDependentStrategy(); |
| |
| private EngineDependentStrategy() { |
| } |
| |
| @Override |
| public void apply(final Traversal.Admin<?, ?> traversal) { |
| for (Step step : traversal.getSteps()) { |
| if (step instanceof EngineDependent) { |
| ((EngineDependent) step).onEngine(traversal.getEngine()); |
| } |
| } |
| } |
| |
| public static EngineDependentStrategy instance() { |
| return INSTANCE; |
| } |
| } |