com.facebook.presto.spi

Class Page

java.lang.Object

com.facebook.presto.spi.Page

public class Page
extends Object

Constructor Summary

Constructors

Constructor and Description
Page(Block... blocks)
Page(int positionCount, Block... blocks)

Method Summary

Modifier and Type	Method and Description
void	assureLoaded() Assures that all data for the block is in memory.
void	compact()
Block	getBlock(int channel)
Block[]	getBlocks()
int	getChannelCount()
int	getPositionCount()
Page	getRegion(int positionOffset, int length)
long	getRetainedSizeInBytes()
long	getSizeInBytes()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Page

public Page(Block... blocks)

Page

public Page(int positionCount,
            Block... blocks)

Method Detail

getChannelCount

public int getChannelCount()

getPositionCount

public int getPositionCount()

getSizeInBytes

public long getSizeInBytes()

getRetainedSizeInBytes

public long getRetainedSizeInBytes()

getBlocks

public Block[] getBlocks()

getBlock

public Block getBlock(int channel)

getRegion

public Page getRegion(int positionOffset,
                      int length)

compact

public void compact()

assureLoaded

public void assureLoaded()

Assures that all data for the block is in memory.

This allows streaming data sources to skip sections that are not accessed in a query.

toString

public String toString()

Overrides:

toString in class Object