Package io.deephaven.integrations.python

Class PythonTableDataReader

java.lang.Object

io.deephaven.integrations.python.PythonTableDataReader

public class PythonTableDataReader
extends Object

An efficient reader for a Python table listener to extract columnar data based on the RowSequence in the TableUpdate

Constructor Summary

Constructors

Constructor	Description
PythonTableDataReader()

Method Summary

Modifier and Type	Method	Description
static Context	makeContext(int chunkCapacity, @NotNull ColumnSource<?>... columnSources)	Factory method for instance of PythonTableDataReader.Context
static Object[]	readChunkColumnMajor(Context context, RowSequence rowSeq, ColumnSource<?>[] columnSources, boolean prev)	Copy data from a table by chunks into a 2D array

Methods inherited from class java.lang.Object

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

Constructor Details

PythonTableDataReader

public PythonTableDataReader()

Method Details

makeContext

public static Context makeContext(int chunkCapacity,
 @NotNull
 @NotNull ColumnSource<?>... columnSources)

Factory method for instance of PythonTableDataReader.Context

Parameters:

chunkCapacity -

columnSources -

Returns:

PythonTableDataReader.Context

readChunkColumnMajor

public static Object[] readChunkColumnMajor(@NotNull
 Context context,
 RowSequence rowSeq,
 ColumnSource<?>[] columnSources,
 boolean prev)

Copy data from a table by chunks into a 2D array

Parameters:

context - the context used in filling the output array

rowSeq - indices of the rows of the table to put into the 2D array

columnSources - columns of data to put into the 2D array

Returns:

a 2D array