org.apache.hadoop.mapred.InputSplit#getClass ( )源码实例Demo

static RecordReader<NullWritable, DynamoDBItemWritable> getRecordReader(
    InputSplit inputSplit, JobConf job, Reporter reporter) throws IOException {
  // CombineFileSplit indicates the new export format which includes a manifest file
  if (inputSplit instanceof CombineFileSplit) {
    int version = job.getInt(DynamoDBConstants.EXPORT_FORMAT_VERSION, -1);
    if (version != ExportManifestRecordWriter.FORMAT_VERSION) {
      throw new IOException("Unknown version: " + job.get(DynamoDBConstants
          .EXPORT_FORMAT_VERSION));
    }
    return new ImportCombineFileRecordReader((CombineFileSplit) inputSplit, job, reporter);
  } else if (inputSplit instanceof FileSplit) {
    // FileSplit indicates the old data pipeline format which doesn't include a manifest file
    Path path = ((FileSplit) inputSplit).getPath();
    return new ImportRecordReader(job, path);
  } else {
    throw new IOException("Expecting CombineFileSplit or FileSplit but the input split type is:"
        + " " + inputSplit.getClass());
  }
}
 

/**
 * Creates a new TaggedInputSplit.
 * 
 * @param inputSplit The InputSplit to be tagged
 * @param conf The configuration to use
 * @param inputFormatClass The InputFormat class to use for this job
 * @param mapperClass The Mapper class to use for this job
 */
public TaggedInputSplit(InputSplit inputSplit, Configuration conf,
    Class<? extends InputFormat> inputFormatClass,
    Class<? extends Mapper> mapperClass) {
  this.inputSplitClass = inputSplit.getClass();
  this.inputSplit = inputSplit;
  this.conf = conf;
  this.inputFormatClass = inputFormatClass;
  this.mapperClass = mapperClass;
}
 

/**
 * Creates a new TaggedInputSplit.
 * 
 * @param inputSplit The InputSplit to be tagged
 * @param conf The configuration to use
 * @param inputFormatClass The InputFormat class to use for this job
 * @param mapperClass The Mapper class to use for this job
 */
public TaggedInputSplit(InputSplit inputSplit, Configuration conf,
    Class<? extends InputFormat> inputFormatClass,
    Class<? extends Mapper> mapperClass) {
  this.inputSplitClass = inputSplit.getClass();
  this.inputSplit = inputSplit;
  this.conf = conf;
  this.inputFormatClass = inputFormatClass;
  this.mapperClass = mapperClass;
}
 

/**
 * Creates a new TaggedInputSplit.
 * 
 * @param inputSplit The InputSplit to be tagged
 * @param conf The configuration to use
 * @param inputFormatClass The InputFormat class to use for this job
 * @param mapperClass The Mapper class to use for this job
 */
public TaggedInputSplit(InputSplit inputSplit, Configuration conf,
    Class<? extends InputFormat> inputFormatClass,
    Class<? extends Mapper> mapperClass) {
  this.inputSplitClass = inputSplit.getClass();
  this.inputSplit = inputSplit;
  this.conf = conf;
  this.inputFormatClass = inputFormatClass;
  this.mapperClass = mapperClass;
}
 

/**
 * Creates a new TaggedInputSplit.
 * 
 * @param inputSplit The InputSplit to be tagged
 * @param conf The configuration to use
 * @param inputFormatClass The InputFormat class to use for this job
 * @param mapperClass The Mapper class to use for this job
 */
public TaggedInputSplit(InputSplit inputSplit, Configuration conf,
    Class<? extends InputFormat> inputFormatClass,
    Class<? extends Mapper> mapperClass) {
  this.inputSplitClass = inputSplit.getClass();
  this.inputSplit = inputSplit;
  this.conf = conf;
  this.inputFormatClass = inputFormatClass;
  this.mapperClass = mapperClass;
}