Package jep

Class DirectNDArray<T extends java.nio.Buffer>

java.lang.Object

jep.DirectNDArray<T>

public class DirectNDArray<T extends java.nio.Buffer>
extends java.lang.Object

Represents a numpy.ndarray in Java. If Jep was compiled with numpy support, this object will not be wrapped as a PyJobject in the Python sub-interpreter(s), it will instead be wrapped as a numpy.ndarray automatically. The numpy.ndarray will reference the exact same memory as the buffer so changes in either language will be immediately visible in both.

DirectNDArrays only support direct buffers as the underlying type of data. The data can conceptually be multi-dimensional, but it must be represented as a one-dimensional direct buffer in Java to ensure the memory is contiguous.

Since:

3.7

Constructor Summary

Constructors

Constructor	Description
DirectNDArray(T data)	Constructor for a Java DirectNDArray.
DirectNDArray(T data, boolean unsigned)	Constructor for a Java DirectNDArray.
DirectNDArray(T data, boolean unsigned, int... dimensions)	Constructor for a Java DirectNDArray.
DirectNDArray(T data, int... dimensions)	Constructor for a Java DirectNDArray.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object obj)
T	getData()
int[]	getDimensions()
int	getLength(T data)
int	hashCode()
boolean	isUnsigned()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DirectNDArray

public DirectNDArray(T data)

Constructor for a Java DirectNDArray. Presumes the data is one dimensional.

Parameters:

data - a direct Buffer

DirectNDArray

public DirectNDArray(T data,
                     boolean unsigned)

Constructor for a Java DirectNDArray. Presumes the data is one dimensional.

Parameters:

data - a direct Buffer

unsigned - whether the data is to be interpreted as unsigned

DirectNDArray

public DirectNDArray(T data,
                     int... dimensions)

Constructor for a Java DirectNDArray.

Parameters:

data - a direct Buffer

dimensions - the conceptual dimensions of the data (corresponds to the numpy.ndarray dimensions in C-contiguous order)

DirectNDArray

public DirectNDArray(T data,
                     boolean unsigned,
                     int... dimensions)

Constructor for a Java DirectNDArray.

Parameters:

data - a direct Buffer

unsigned - whether the data is to be interpreted as unsigned

dimensions - the conceptual dimensions of the data (corresponds to the numpy.ndarray dimensions in C-contiguous order)

Method Detail

getLength

public int getLength(T data)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

getDimensions

public int[] getDimensions()

isUnsigned

public boolean isUnsigned()

getData

public T getData()