Package ai.rapids.cudf

Class JCudfSerialization.SerializedColumnHeader

java.lang.Object

ai.rapids.cudf.JCudfSerialization.SerializedColumnHeader

Enclosing class:

JCudfSerialization

public static final class JCudfSerialization.SerializedColumnHeader
extends Object

Holds the metadata about a serialized column.

Field Summary

Fields

Modifier and Type	Field	Description
final JCudfSerialization.SerializedColumnHeader[]	children
final DType	dtype
final long	nullCount
final long	rowCount

Method Summary

Modifier and Type	Method	Description
JCudfSerialization.SerializedColumnHeader[]	getChildren()	Get the metadata for any child columns or null if there are no children
long	getNullCount()	Get the null count of the column
int	getNumChildren()	Get the number of child columns
long	getRowCount()	Get the row count of the column
long	getSerializedHeaderSizeInBytes()	Return the number of bytes needed to store this column header in serialized form.
DType	getType()	Get the data type of the column
void	writeTo(ai.rapids.cudf.JCudfSerialization.DataWriter dout)	Write this column header to the specified writer

Methods inherited from class java.lang.Object

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

Field Details

dtype

public final DType dtype

nullCount

public final long nullCount

rowCount

public final long rowCount

children

public final JCudfSerialization.SerializedColumnHeader[] children

Method Details

getType

public DType getType()

Get the data type of the column

getRowCount

public long getRowCount()

Get the row count of the column

getNullCount

public long getNullCount()

Get the null count of the column

getChildren

public JCudfSerialization.SerializedColumnHeader[] getChildren()

Get the metadata for any child columns or null if there are no children

getNumChildren

public int getNumChildren()

Get the number of child columns

getSerializedHeaderSizeInBytes

public long getSerializedHeaderSizeInBytes()

Return the number of bytes needed to store this column header in serialized form.

writeTo

public void writeTo(ai.rapids.cudf.JCudfSerialization.DataWriter dout)
             throws IOException

Write this column header to the specified writer

Throws:

IOException