| /* |
| * 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.giraph.structure.io; |
| |
| import org.apache.giraph.graph.Vertex; |
| import org.apache.giraph.io.VertexReader; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.RecordReader; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| import org.apache.tinkerpop.gremlin.giraph.process.computer.GiraphVertex; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable; |
| |
| import java.io.IOException; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class GiraphVertexReader extends VertexReader { |
| |
| private RecordReader<NullWritable, VertexWritable> recordReader; |
| |
| public GiraphVertexReader(final RecordReader<NullWritable, VertexWritable> recordReader) { |
| this.recordReader = recordReader; |
| } |
| |
| @Override |
| public void initialize(final InputSplit inputSplit, final TaskAttemptContext context) throws IOException, InterruptedException { |
| this.recordReader.initialize(inputSplit, context); |
| } |
| |
| @Override |
| public boolean nextVertex() throws IOException, InterruptedException { |
| return this.recordReader.nextKeyValue(); |
| } |
| |
| @Override |
| public Vertex getCurrentVertex() throws IOException, InterruptedException { |
| return new GiraphVertex(this.recordReader.getCurrentValue()); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| this.recordReader.close(); |
| } |
| |
| @Override |
| public float getProgress() throws IOException, InterruptedException { |
| return this.recordReader.getProgress(); |
| } |
| } |