@Override
      public boolean nextKeyValue() {
        if (readOver) {
          return false;
        }

        key = NullWritable.get();
        value = split;

        readOver = true;
        return true;
      }
InputFormat of Performance Evaluation MapReduce job. It extends from FileInputFormat, want to
use it's methods such as setInputPaths().
hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/PerformanceEvaluation.java