| /* |
| * 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.giraph.edge; |
| |
| import org.apache.giraph.conf.GiraphConfigurationSettable; |
| import org.apache.hadoop.io.Writable; |
| |
| /** |
| * Implementations of this interface can decide whether |
| * we should create a vertex when it is not present in vertex input |
| * but exists in edge input. |
| * |
| * @param <I> vertex id |
| */ |
| public interface CreateSourceVertexCallback<I extends Writable> |
| extends GiraphConfigurationSettable { |
| |
| /** |
| * Should we create a vertex that doesn't exist in vertex input |
| * but only exists in edge input |
| * @param vertexId the id of vertex to be created |
| * @return true if we should create a vertex |
| */ |
| boolean shouldCreateSourceVertex(I vertexId); |
| |
| } |
