com.facebook.presto.spi.block

Class LazyFixedWidthBlock

java.lang.Object

com.facebook.presto.spi.block.AbstractFixedWidthBlock

com.facebook.presto.spi.block.LazyFixedWidthBlock

All Implemented Interfaces:

Block

public class LazyFixedWidthBlock
extends AbstractFixedWidthBlock

Field Summary

Fields inherited from class com.facebook.presto.spi.block.AbstractFixedWidthBlock

fixedSize

Constructor Summary

Constructors

Constructor and Description
LazyFixedWidthBlock(int fixedSize, int positionCount, LazyBlockLoader<LazyFixedWidthBlock> loader)

Method Summary

Modifier and Type	Method and Description
void	assureLoaded() Assures that all data for the block is in memory.
Block	copyPositions(List<Integer> positions) Returns a block containing the specified positions.
Block	copyRegion(int positionOffset, int length) Returns a block starting at the specified position and extends for the specified length.
int	getPositionCount() Returns the number of positions in this block.
protected io.airlift.slice.Slice	getRawSlice()
Block	getRegion(int positionOffset, int length) Returns a block starting at the specified position and extends for the specified length.
int	getRetainedSizeInBytes() Returns the retained size of this block in memory.
int	getSizeInBytes() Returns the logical size of this block in memory.
protected boolean	isEntryNull(int position)
void	setNullVector(boolean[] valueIsNull)
void	setRawSlice(io.airlift.slice.Slice slice)
String	toString()

Methods inherited from class com.facebook.presto.spi.block.AbstractFixedWidthBlock

bytesCompare, bytesEqual, checkReadablePosition, compareTo, equals, getByte, getDouble, getEncoding, getFixedSize, getFloat, getInt, getLength, getLong, getShort, getSingleValueBlock, getSlice, hash, isNull, writeBytesTo, writePositionTo

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.facebook.presto.spi.block.Block

getObject

Constructor Detail

LazyFixedWidthBlock

public LazyFixedWidthBlock(int fixedSize,
                           int positionCount,
                           LazyBlockLoader<LazyFixedWidthBlock> loader)

Method Detail

getRawSlice

protected io.airlift.slice.Slice getRawSlice()

Specified by:

getRawSlice in class AbstractFixedWidthBlock

isEntryNull

protected boolean isEntryNull(int position)

Specified by:

isEntryNull in class AbstractFixedWidthBlock

getPositionCount

public int getPositionCount()

Description copied from interface: Block

Returns the number of positions in this block.

getSizeInBytes

public int getSizeInBytes()

Description copied from interface: Block

Returns the logical size of this block in memory.

getRetainedSizeInBytes

public int getRetainedSizeInBytes()

Description copied from interface: Block

Returns the retained size of this block in memory.

copyPositions

public Block copyPositions(List<Integer> positions)

Description copied from interface: Block

Returns a block containing the specified positions. All specified positions must be valid for this block.

The returned block must be a compact representation of the original block.

getRegion

public Block getRegion(int positionOffset,
                       int length)

Description copied from interface: Block

Returns a block starting at the specified position and extends for the specified length. The specified region must be entirely contained within this block.

The region can be a view over this block. If this block is released the region block may also be released. If the region block is released this block may also be released.

copyRegion

public Block copyRegion(int positionOffset,
                        int length)

Description copied from interface: Block

Returns a block starting at the specified position and extends for the specified length. The specified region must be entirely contained within this block.

The region returned must be a compact representation of the original block, unless their internal representation will be exactly the same. This method is useful for operators that hold on to a range of values without holding on to the entire block.

assureLoaded

public void assureLoaded()

Description copied from interface: Block

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.

Specified by:

assureLoaded in interface Block

Overrides:

assureLoaded in class AbstractFixedWidthBlock

setRawSlice

public void setRawSlice(io.airlift.slice.Slice slice)

setNullVector

public void setNullVector(boolean[] valueIsNull)

toString

public String toString()

Overrides:

toString in class Object