com.facebook.presto.spi.block

Class LazySliceArrayBlock

java.lang.Object

com.facebook.presto.spi.block.AbstractVariableWidthBlock

com.facebook.presto.spi.block.LazySliceArrayBlock

All Implemented Interfaces:

Block

public class LazySliceArrayBlock
extends AbstractVariableWidthBlock

Constructor Summary

Constructors

Constructor and Description
LazySliceArrayBlock(int positionCount, LazyBlockLoader<LazySliceArrayBlock> 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.
DictionaryBlock	createDictionaryBlock()
Block	createNonLazyBlock()
BlockEncoding	getEncoding() Get the encoding for this block.
int[]	getIds()
int	getLength(int position) Gets the length of the value at the position.
int	getPositionCount() Returns the number of positions in this block.
protected int	getPositionOffset(int position)
protected io.airlift.slice.Slice	getRawSlice(int position)
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.
io.airlift.slice.Slice[]	getValues()
boolean	isDictionary()
protected boolean	isEntryNull(int position)
void	setValues(io.airlift.slice.Slice[] values)
void	setValues(io.airlift.slice.Slice[] values, int[] ids, boolean[] isNull)
String	toString()

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

bytesCompare, bytesEqual, compareTo, equals, getByte, getDouble, getFloat, getInt, 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

LazySliceArrayBlock

public LazySliceArrayBlock(int positionCount,
                           LazyBlockLoader<LazySliceArrayBlock> loader)

Method Detail

getEncoding

public BlockEncoding getEncoding()

Description copied from interface: Block

Get the encoding for this block.

Specified by:

getEncoding in interface Block

Overrides:

getEncoding in class AbstractVariableWidthBlock

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.

getRawSlice

protected io.airlift.slice.Slice getRawSlice(int position)

Specified by:

getRawSlice in class AbstractVariableWidthBlock

getPositionOffset

protected int getPositionOffset(int position)

Specified by:

getPositionOffset in class AbstractVariableWidthBlock

isEntryNull

protected boolean isEntryNull(int position)

Specified by:

isEntryNull in class AbstractVariableWidthBlock

getPositionCount

public int getPositionCount()

Description copied from interface: Block

Returns the number of positions in this block.

getLength

public int getLength(int position)

Description copied from interface: Block

Gets the length of the value at the position.

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.

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 AbstractVariableWidthBlock

toString

public String toString()

Overrides:

toString in class Object

getValues

public io.airlift.slice.Slice[] getValues()

getIds

public int[] getIds()

createDictionaryBlock

public DictionaryBlock createDictionaryBlock()

isDictionary

public boolean isDictionary()

setValues

public void setValues(io.airlift.slice.Slice[] values)

setValues

public void setValues(io.airlift.slice.Slice[] values,
                      int[] ids,
                      boolean[] isNull)

createNonLazyBlock

public Block createNonLazyBlock()