1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package org.apache.giraph.io.formats;
20
21 import org.apache.giraph.bsp.BspInputSplit;
22 import org.apache.giraph.io.VertexInputFormat;
23 import org.apache.hadoop.conf.Configuration;
24 import org.apache.hadoop.io.Writable;
25 import org.apache.hadoop.io.WritableComparable;
26 import org.apache.hadoop.mapreduce.InputSplit;
27 import org.apache.hadoop.mapreduce.JobContext;
28
29 import java.io.IOException;
30 import java.util.ArrayList;
31 import java.util.List;
32
33 /**
34 * This VertexInputFormat is meant for testing/debugging. It simply generates
35 * some vertex data that can be consumed by test applications.
36 *
37 * @param <I> Vertex id
38 * @param <V> Vertex data
39 * @param <E> Edge data
40 */
41 @SuppressWarnings("rawtypes")
42 public abstract class GeneratedVertexInputFormat<
43 I extends WritableComparable, V extends Writable, E extends Writable>
44 extends VertexInputFormat<I, V, E> {
45 @Override public void checkInputSpecs(Configuration conf) { }
46
47 @Override
48 public List<InputSplit> getSplits(JobContext context, int minSplitCountHint)
49 throws IOException, InterruptedException {
50 // This is meaningless, the VertexReader will generate all the test
51 // data.
52 List<InputSplit> inputSplitList = new ArrayList<InputSplit>();
53 for (int i = 0; i < minSplitCountHint; ++i) {
54 inputSplitList.add(new BspInputSplit(i, minSplitCountHint));
55 }
56 return inputSplitList;
57 }
58 }