Package org.apache.drill.exec.store.hdf5

Class HDF5Utils

java.lang.Object

org.apache.drill.exec.store.hdf5.HDF5Utils

public class HDF5Utils
extends Object

Constructor Summary

Constructors

Constructor	Description
HDF5Utils()

Method Summary

Modifier and Type	Method	Description
static Stream<Object>	flatten(Object[] array)
static HDF5Attribute	getAttribute(String pathName, String key, io.jhdf.HdfFile hdf5File)	This function returns and HDF5Attribute object for use when Drill maps the attributes.
static Class<?>	getDatasetClass(String path, io.jhdf.HdfFile reader)	This function gets the type of dataset
static TypeProtos.MinorType	getDataType(io.jhdf.object.datatype.DataType dataType)	This function returns the Drill data type of a given HDF5 dataset.
static String	getNameFromPath(String path)	This helper function returns the name of a HDF5 record from a data path
static boolean[][]	toBooleanMatrix(Object[] inputArray)
static byte[][]	toByteMatrix(Object[] inputArray)
static double[][]	toDoubleMatrix(Object[] inputArray)
static float[][]	toFloatMatrix(Object[] inputArray)
static int[][]	toIntMatrix(Object[] inputArray)
static long[][]	toLongMatrix(Object[] inputArray)
static Object[]	toMatrix(Object[] inputArray)
static short[][]	toShortMatrix(Object[] inputArray)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

HDF5Utils

public HDF5Utils()

Method Details

getAttribute

public static HDF5Attribute getAttribute(String pathName,
 String key,
 io.jhdf.HdfFile hdf5File)

This function returns and HDF5Attribute object for use when Drill maps the attributes.

Parameters:

pathName - The path to retrieve attributes from

key - The key for the specific attribute you are retrieving

hdf5File - The hdfFile reader object for the file you are querying

Returns:

HDF5Attribute The attribute from the path with the key that was requested.

getDataType

public static TypeProtos.MinorType getDataType(io.jhdf.object.datatype.DataType dataType)

This function returns the Drill data type of a given HDF5 dataset.

Parameters:

dataType - The input data set.

Returns:

MinorType The Drill data type of the dataset in question

getDatasetClass

public static Class<?> getDatasetClass(String path,
 io.jhdf.HdfFile reader)

This function gets the type of dataset

Parameters:

path - The path of the dataset

reader - The HDF5 reader

Returns:

The data type

getNameFromPath

public static String getNameFromPath(String path)

This helper function returns the name of a HDF5 record from a data path

Parameters:

path - Path to HDF5 data

Returns:

String name of data

toMatrix

public static Object[] toMatrix(Object[] inputArray)

toBooleanMatrix

public static boolean[][] toBooleanMatrix(Object[] inputArray)

toByteMatrix

public static byte[][] toByteMatrix(Object[] inputArray)

toShortMatrix

public static short[][] toShortMatrix(Object[] inputArray)

toIntMatrix

public static int[][] toIntMatrix(Object[] inputArray)

toLongMatrix

public static long[][] toLongMatrix(Object[] inputArray)

toFloatMatrix

public static float[][] toFloatMatrix(Object[] inputArray)

toDoubleMatrix

public static double[][] toDoubleMatrix(Object[] inputArray)

flatten

public static Stream<Object> flatten(Object[] array)