| /* |
| * 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.util; |
| |
| import org.apache.tinkerpop.gremlin.process.traversal.Traversal; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategies; |
| import org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy; |
| import org.apache.tinkerpop.gremlin.process.traversal.traverser.TraverserGeneratorFactory; |
| import org.apache.tinkerpop.gremlin.process.traversal.traverser.util.DefaultTraverserGeneratorFactory; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class EmptyTraversalStrategies implements TraversalStrategies { |
| |
| private static final EmptyTraversalStrategies INSTANCE = new EmptyTraversalStrategies(); |
| |
| private EmptyTraversalStrategies() { |
| } |
| |
| @Override |
| public List<TraversalStrategy<?>> toList() { |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public void applyStrategies(final Traversal.Admin<?, ?> traversal) { |
| |
| } |
| |
| @Override |
| public TraversalStrategies addStrategies(final TraversalStrategy<?>... strategies) { |
| return this; |
| } |
| |
| @Override |
| public TraversalStrategies removeStrategies(final Class<? extends TraversalStrategy>... strategyClasses) { |
| return this; |
| } |
| |
| @Override |
| @SuppressWarnings("CloneDoesntCallSuperClone") |
| public TraversalStrategies clone() { |
| return this; |
| } |
| |
| @Override |
| public TraverserGeneratorFactory getTraverserGeneratorFactory() { |
| return DefaultTraverserGeneratorFactory.instance(); |
| } |
| |
| @Override |
| public void setTraverserGeneratorFactory(final TraverserGeneratorFactory traverserGeneratorFactory) { |
| |
| } |
| |
| public static EmptyTraversalStrategies instance() { |
| return INSTANCE; |
| } |
| } |