@Override
    public float getProgress() throws IOException {
        return (0 == this.currentLength || 0 == this.splitLength) ? 0.0f : (float) this.currentLength / (float) this.splitLength;
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
hadoop-gremlin/src/main/java/org/apache/tinkerpop/gremlin/hadoop/structure/io/gryo/GryoRecordReader.java