/*

  * 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.io.formats;

 import org.apache.giraph.bsp.BspInputSplit;

 import org.apache.giraph.io.VertexInputFormat;

 import org.apache.hadoop.conf.Configuration;

 import org.apache.hadoop.io.Writable;

 import org.apache.hadoop.io.WritableComparable;

 import org.apache.hadoop.mapreduce.InputSplit;

 import org.apache.hadoop.mapreduce.JobContext;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.List;

 /**

  * This VertexInputFormat is meant for testing/debugging.  It simply generates

  * some vertex data that can be consumed by test applications.

  *

  * @param <I> Vertex id

  * @param <V> Vertex data

  * @param <E> Edge data

  */

 @SuppressWarnings("rawtypes")

 public abstract class GeneratedVertexInputFormat<

     I extends WritableComparable, V extends Writable, E extends Writable>

     extends VertexInputFormat<I, V, E> {

   @Override public void checkInputSpecs(Configuration conf) { }

   @Override

   public List<InputSplit> getSplits(JobContext context, int minSplitCountHint)

     throws IOException, InterruptedException {

     // This is meaningless, the VertexReader will generate all the test

     // data.

     List<InputSplit> inputSplitList = new ArrayList<InputSplit>();

     for (int i = 0; i < minSplitCountHint; ++i) {

       inputSplitList.add(new BspInputSplit(i, minSplitCountHint));

     }

     return inputSplitList;

   }

 }