/*

  * 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.hadoop.fs.Path;

 import org.apache.hadoop.io.LongWritable;

 import org.apache.hadoop.io.Text;

 import org.apache.hadoop.io.compress.CompressionCodec;

 import org.apache.hadoop.io.compress.CompressionCodecFactory;

 import org.apache.hadoop.mapreduce.InputSplit;

 import org.apache.hadoop.mapreduce.JobContext;

 import org.apache.hadoop.mapreduce.RecordReader;

 import org.apache.hadoop.mapreduce.TaskAttemptContext;

 import org.apache.hadoop.mapreduce.lib.input.LineRecordReader;

 /**

  * Provides functionality similar to

  * {@link org.apache.hadoop.mapreduce.lib.input.TextInputFormat},

  * but allows for different data sources (vertex and edge data).

  */

 public class GiraphTextInputFormat

     extends GiraphFileInputFormat<LongWritable, Text> {

   @Override

   public RecordReader<LongWritable, Text>

   createRecordReader(InputSplit split, TaskAttemptContext context) {

     return new LineRecordReader();

   }

   @Override

   protected boolean isSplitable(JobContext context, Path file) {

     CompressionCodec codec =

         new CompressionCodecFactory(context.getConfiguration()).getCodec(file);

     return codec == null;

   }

 }