io.improbable.keanu.util

Class Py4jByteArrayConverter

java.lang.Object

io.improbable.keanu.util.Py4jByteArrayConverter

public class Py4jByteArrayConverter
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
Py4jByteArrayConverter()

Method Summary

Modifier and Type	Method and Description
static boolean[]	toBooleanArray(byte[] byteArray, int numberOfBooleansInArray) This function is intended to be called from the Python API with the result of np.packbits(...).toBytes().
byte[]	toByteArray(boolean[] booleanArray)
byte[]	toByteArray(double[] doubleArray)
byte[]	toByteArray(int[] integerArray)
static double[]	toDoubleArray(byte[] byteArray)
static int[]	toIntegerArray(byte[] byteArray)
static long[]	toLongArray(byte[] byteArray)

Methods inherited from class java.lang.Object

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

Constructor Detail

Py4jByteArrayConverter

public Py4jByteArrayConverter()

Method Detail

toByteArray

public byte[] toByteArray(double[] doubleArray)

toByteArray

public byte[] toByteArray(int[] integerArray)

toByteArray

public byte[] toByteArray(boolean[] booleanArray)

toDoubleArray

public static double[] toDoubleArray(byte[] byteArray)

toIntegerArray

public static int[] toIntegerArray(byte[] byteArray)

toLongArray

public static long[] toLongArray(byte[] byteArray)

toBooleanArray

public static boolean[] toBooleanArray(byte[] byteArray,
                                       int numberOfBooleansInArray)

This function is intended to be called from the Python API with the result of np.packbits(...).toBytes(). In Python, the result of this is a byte array where each boolean is represented by a single bit (0 for false, 1 for true). When put into a bytearray, these bits may need to be padded with up to 7 bits to make a whole number of bytes. Therefore, the function requires the parameter numberOfBooleansInArray to know which bits are padding bits and which are booleans.

Parameters:

byteArray - an array of bytes where booleans (in little endian form) are represented by single bits.

numberOfBooleansInArray - the number of booleans represented by the bits in the bytearray

Returns:

an array of booleans