| /* |
| * 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.hugegraph.traversal.algorithm.strategy; |
| |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.function.BiConsumer; |
| |
| import org.apache.hugegraph.HugeGraph; |
| import org.apache.hugegraph.backend.id.Id; |
| import org.apache.hugegraph.traversal.algorithm.steps.EdgeStep; |
| import org.apache.hugegraph.traversal.algorithm.HugeTraverser; |
| |
| public interface TraverseStrategy { |
| |
| void traverseOneLayer(Map<Id, List<HugeTraverser.Node>> vertices, |
| EdgeStep step, BiConsumer<Id, EdgeStep> consumer); |
| |
| Map<Id, List<HugeTraverser.Node>> newMultiValueMap(); |
| |
| Set<HugeTraverser.Path> newPathSet(); |
| |
| void addNode(Map<Id, List<HugeTraverser.Node>> vertices, Id id, |
| HugeTraverser.Node node); |
| |
| void addNewVerticesToAll(Map<Id, List<HugeTraverser.Node>> newVertices, |
| Map<Id, List<HugeTraverser.Node>> targets); |
| |
| static TraverseStrategy create(boolean concurrent, HugeGraph graph) { |
| return concurrent ? new ConcurrentTraverseStrategy(graph) : |
| new SingleTraverseStrategy(graph); |
| } |
| } |