com.facebook.presto.spi

Class PageBuilder

java.lang.Object

com.facebook.presto.spi.PageBuilder

public class PageBuilder
extends Object

Constructor Summary

Constructors

Constructor and Description
PageBuilder(int initialExpectedEntries, List<? extends Type> types)
PageBuilder(List<? extends Type> types) Create a PageBuilder with given types.

Method Summary

Modifier and Type	Method and Description
Page	build()
void	declarePosition()
void	declarePositions(int positions)
BlockBuilder	getBlockBuilder(int channel)
int	getPositionCount()
long	getRetainedSizeInBytes()
long	getSizeInBytes()
Type	getType(int channel)
boolean	isEmpty()
boolean	isFull()
PageBuilder	newPageBuilderLike()
void	reset()
static PageBuilder	withMaxPageSize(int maxPageBytes, List<? extends Type> types)

Methods inherited from class java.lang.Object

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

Constructor Detail

PageBuilder

public PageBuilder(List<? extends Type> types)

Create a PageBuilder with given types.

A PageBuilder instance created with this constructor has no estimation about bytes per entry, therefore it can resize frequently while appending new rows.

This constructor should only be used to get the initial PageBuilder. Once the PageBuilder is full use reset() or createPageBuilderLike() to create a new PageBuilder instance with its size estimated based on previous data.

PageBuilder

public PageBuilder(int initialExpectedEntries,
                   List<? extends Type> types)

Method Detail

withMaxPageSize

public static PageBuilder withMaxPageSize(int maxPageBytes,
                                          List<? extends Type> types)

reset

public void reset()

newPageBuilderLike

public PageBuilder newPageBuilderLike()

getBlockBuilder

public BlockBuilder getBlockBuilder(int channel)

getType

public Type getType(int channel)

declarePosition

public void declarePosition()

declarePositions

public void declarePositions(int positions)

isFull

public boolean isFull()

isEmpty

public boolean isEmpty()

getPositionCount

public int getPositionCount()

getSizeInBytes

public long getSizeInBytes()

getRetainedSizeInBytes

public long getRetainedSizeInBytes()

build

public Page build()