| /* |
| * 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.GiraphConstants; |
| import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; |
| import org.apache.hadoop.io.Writable; |
| |
| /** |
| * Default implementation of vertex creation decision maker. |
| * By default you can either create all vertices or not create |
| * implicit vertices at all. |
| * |
| * @param <I> Vertex id |
| */ |
| public class DefaultCreateSourceVertexCallback<I extends Writable> |
| implements CreateSourceVertexCallback<I> { |
| /** |
| * True if giraph has to create even vertices that only exist |
| * in edge input |
| */ |
| private boolean shouldCreateVertices; |
| |
| @Override |
| public boolean shouldCreateSourceVertex(I vertexId) { |
| return shouldCreateVertices; |
| } |
| |
| @Override |
| public void setConf(ImmutableClassesGiraphConfiguration configuration) { |
| shouldCreateVertices = |
| GiraphConstants.CREATE_EDGE_SOURCE_VERTICES.get(configuration); |
| } |
| } |