code: public static <K, V> org.apache.flink.api.java.hadoop.mapreduce.HadoopInputFormat<K, V> readHadoopFile(
  			org.apache.hadoop.mapreduce.lib.input.FileInputFormat<K, V> mapreduceInputFormat, Class<K> key, Class<V> value, String inputPath) throws IOException {
  		return readHadoopFile(mapreduceInputFormat, key, value, inputPath, Job.getInstance());
  	}
docs: Creates a Flink {@link InputFormat} that wraps the given Hadoop {@link org.apache.hadoop.mapreduce.lib.input.FileInputFormat}.
  
  @return A Flink InputFormat that wraps the Hadoop FileInputFormat.