content: /*
   * 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
   *
   *     https://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.avro.mapred.tether;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.hadoop.io.NullWritable;
  import org.apache.hadoop.fs.FileStatus;
  import org.apache.hadoop.mapred.JobConf;
  import org.apache.hadoop.mapred.FileInputFormat;
  import org.apache.hadoop.mapred.InputSplit;
  import org.apache.hadoop.mapred.FileSplit;
  import org.apache.hadoop.mapred.Reporter;
  import org.apache.hadoop.mapred.RecordReader;
  
  import org.apache.avro.mapred.AvroInputFormat;
  import org.apache.avro.mapred.AvroOutputFormat;
  
  /**
   * An {@link org.apache.hadoop.mapred.InputFormat} for tethered Avro input.
   *
   * By default, when pointed at a directory, this will silently skip over any
   * files in it that do not have .avro extension. To instead include all files,
   * set the avro.mapred.ignore.inputs.without.extension property to false.
   */
  class TetherInputFormat extends FileInputFormat<TetherData, NullWritable> {
  
    @Override
    protected FileStatus[] listStatus(JobConf job) throws IOException {
      if (job.getBoolean(AvroInputFormat.IGNORE_FILES_WITHOUT_EXTENSION_KEY,
          AvroInputFormat.IGNORE_INPUTS_WITHOUT_EXTENSION_DEFAULT)) {
        List<FileStatus> result = new ArrayList<>();
        for (FileStatus file : super.listStatus(job))
          if (file.getPath().getName().endsWith(AvroOutputFormat.EXT))
            result.add(file);
        return result.toArray(new FileStatus[0]);
      } else {
        return super.listStatus(job);
      }
    }
  
    @Override
    public RecordReader<TetherData, NullWritable> getRecordReader(InputSplit split, JobConf job, Reporter reporter)
        throws IOException {
      reporter.setStatus(split.toString());
      return new TetherRecordReader(job, (FileSplit) split);
    }
  
  }
  