public <A> Class<A> getGraphReader() {
        try {
            return (Class) Class.forName(this.getString(Constants.GREMLIN_HADOOP_GRAPH_READER));
        } catch (final ClassNotFoundException e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
hadoop-gremlin/src/main/java/org/apache/tinkerpop/gremlin/hadoop/structure/HadoopConfiguration.java