com.facebook.presto.common.block

Class ArrayBlockBuilder

java.lang.Object

com.facebook.presto.common.block.AbstractArrayBlock

com.facebook.presto.common.block.ArrayBlockBuilder

All Implemented Interfaces:

Block, BlockBuilder, UncheckedBlock

public class ArrayBlockBuilder
extends AbstractArrayBlock
implements BlockBuilder

Nested Class Summary

Nested classes/interfaces inherited from class com.facebook.presto.common.block.AbstractArrayBlock

AbstractArrayBlock.ArrayBlockFunction<T>

Constructor Summary

Constructors

Constructor and Description
ArrayBlockBuilder(BlockBuilder valuesBlock, BlockBuilderStatus blockBuilderStatus, int expectedEntries) Caller of this constructor is responsible for making sure `valuesBlock` is constructed with the same `blockBuilderStatus` as the one in the argument
ArrayBlockBuilder(Type elementType, BlockBuilderStatus blockBuilderStatus, int expectedEntries)
ArrayBlockBuilder(Type elementType, BlockBuilderStatus blockBuilderStatus, int expectedEntries, int expectedBytesPerEntry)

Method Summary

Modifier and Type	Method and Description
BlockBuilder	appendNull() Returns a block that has an appended null at the end, no matter if the original block has null or not.
BlockBuilder	appendStructure(Block block) Append a struct to the block and close the entry.
BlockBuilder	appendStructureInternal(Block block, int position) Do not use this interface outside block package.
SingleArrayBlockWriter	beginBlockEntry() Return a writer to the current entry.
void	beginDirectEntry() Start a nested entry on the builder.
ArrayBlock	build() Builds the block.
BlockBuilder	closeEntry() Closes the current entry.
BlockBuilder	getElementBlockBuilder()
int	getOffsetBase()
protected int[]	getOffsets()
int	getPositionCount() Returns the number of positions in this block.
protected Block	getRawElementBlock()
long	getRetainedSizeInBytes() Returns the retained size of this block in memory, including over-allocations.
Block	getSingleValueBlock(int position) Gets the value at the specified position as a single element block.
long	getSizeInBytes() Returns the size of this block as if it was compacted, ignoring any over-allocations.
protected boolean[]	getValueIsNull()
boolean	isNull(int position) Is the specified position null?
boolean	mayHaveNull() Is it possible the block may have a null value? If false, the block can not contain a null, but if true, the block may or may not have a null.
BlockBuilder	newBlockBuilderLike(BlockBuilderStatus blockBuilderStatus) Creates a new block builder of the same type based on the current usage statistics of this block builder.
BlockBuilder	newBlockBuilderLike(BlockBuilderStatus blockBuilderStatus, int expectedEntries) Creates a new block builder of the same type based on the expectedEntries and the current usage statistics of this block builder.
BlockBuilder	readPositionFrom(io.airlift.slice.SliceInput input) Read a single position from the input
void	retainedBytesForEachPart(BiConsumer<Object,Long> consumer) consumer visits each of the internal data container and accepts the size for it.
String	toString()

Methods inherited from class com.facebook.presto.common.block.AbstractArrayBlock

apply, checkReadablePosition, copyPositions, copyRegion, fixedSizeInBytesPerPosition, getApproximateRegionLogicalSizeInBytes, getBlock, getBlockUnchecked, getEncodingName, getEstimatedDataSizeForStats, getPositionsSizeInBytes, getRegion, getRegionLogicalSizeInBytes, getRegionSizeInBytes, getSingleValueBlockInternal, isNullUnchecked, writePositionTo, 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.common.block.BlockBuilder

getPositions, writeByte, writeBytes, writeInt, writeLong, writeShort

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

bytesCompare, bytesEqual, compareTo, copyPositions, copyRegion, equals, fixedSizeInBytesPerPosition, getApproximateRegionLogicalSizeInBytes, getBlock, getByte, getEncodingName, getEstimatedDataSizeForStats, getInt, getLoadedBlock, getLogicalSizeInBytes, getLong, getLong, getPositionsSizeInBytes, getRegion, getRegionLogicalSizeInBytes, getRegionSizeInBytes, getShort, getSlice, getSliceLength, hash, writeBytesTo, writeBytesTo, writePositionTo, writePositionTo

Methods inherited from interface com.facebook.presto.common.block.UncheckedBlock

getBlockUnchecked, getByteUnchecked, getIntUnchecked, getLongUnchecked, getLongUnchecked, getShortUnchecked, getSliceLengthUnchecked, getSliceUnchecked, isNullUnchecked

Constructor Detail

ArrayBlockBuilder

public ArrayBlockBuilder(BlockBuilder valuesBlock,
                         BlockBuilderStatus blockBuilderStatus,
                         int expectedEntries)

Caller of this constructor is responsible for making sure `valuesBlock` is constructed with the same `blockBuilderStatus` as the one in the argument

ArrayBlockBuilder

public ArrayBlockBuilder(Type elementType,
                         BlockBuilderStatus blockBuilderStatus,
                         int expectedEntries,
                         int expectedBytesPerEntry)

ArrayBlockBuilder

public ArrayBlockBuilder(Type elementType,
                         BlockBuilderStatus blockBuilderStatus,
                         int expectedEntries)

Method Detail

getPositionCount

public int getPositionCount()

Description copied from interface: Block

Returns the number of positions in this block.

Specified by:

getPositionCount in interface Block

getSizeInBytes

public long getSizeInBytes()

Description copied from interface: Block

Returns the size of this block as if it was compacted, ignoring any over-allocations. For example, in dictionary blocks, this only counts each dictionary entry once, rather than each time a value is referenced.

Specified by:

getSizeInBytes in interface Block

getRetainedSizeInBytes

public long getRetainedSizeInBytes()

Description copied from interface: Block

Returns the retained size of this block in memory, including over-allocations. This method is called from the inner most execution loop and must be fast.

Specified by:

getRetainedSizeInBytes in interface Block

retainedBytesForEachPart

public void retainedBytesForEachPart(BiConsumer<Object,Long> consumer)

Description copied from interface: Block

consumer visits each of the internal data container and accepts the size for it. This method can be helpful in cases such as memory counting for internal data structure. Also, the method should be non-recursive, only visit the elements at the top level, and specifically should not call retainedBytesForEachPart on nested blocks consumer should be called at least once with the current block and must include the instance size of the current block

Specified by:

retainedBytesForEachPart in interface Block

getRawElementBlock

protected Block getRawElementBlock()

Specified by:

getRawElementBlock in class AbstractArrayBlock

getOffsets

protected int[] getOffsets()

Specified by:

getOffsets in class AbstractArrayBlock

getOffsetBase

public int getOffsetBase()

Specified by:

getOffsetBase in interface UncheckedBlock

Specified by:

getOffsetBase in class AbstractArrayBlock

Returns:

the internal offset of the underlying data structure of this block

getValueIsNull

@Nullable
protected boolean[] getValueIsNull()

Specified by:

getValueIsNull in class AbstractArrayBlock

Returns:

the underlying valueIsNull array, or null when all values are guaranteed to be non-null

mayHaveNull

public boolean mayHaveNull()

Description copied from interface: Block

Is it possible the block may have a null value? If false, the block can not contain a null, but if true, the block may or may not have a null.

Specified by:

mayHaveNull in interface Block

Overrides:

mayHaveNull in class AbstractArrayBlock

isNull

public boolean isNull(int position)

Description copied from interface: Block

Is the specified position null?

Specified by:

isNull in interface Block

appendStructure

public BlockBuilder appendStructure(Block block)

Description copied from interface: BlockBuilder

Append a struct to the block and close the entry.

Specified by:

appendStructure in interface BlockBuilder

getSingleValueBlock

public Block getSingleValueBlock(int position)

Description copied from interface: Block

Gets the value at the specified position as a single element block. The returned block should retain only the memory required for a single block.

This method is useful for operators that hold on to a single value without holding on to the entire block.

Specified by:

getSingleValueBlock in interface Block

appendStructureInternal

public BlockBuilder appendStructureInternal(Block block,
                                            int position)

Description copied from interface: BlockBuilder

Do not use this interface outside block package. Instead, use Block.writePositionTo(BlockBuilder, position)

Specified by:

appendStructureInternal in interface BlockBuilder

getElementBlockBuilder

public BlockBuilder getElementBlockBuilder()

beginDirectEntry

public void beginDirectEntry()

Description copied from interface: BlockBuilder

Start a nested entry on the builder. beginBlockEntry returns an instance of block builder to write the nested entry. beginBlockEntry returns a blockBuilder instance and delegates the call to the nested entry block builder. beginDirectEntry does not allocate the blockBuilder, and it is the caller's responsibility to get the nested block builder and populate the nested block builder.

Specified by:

beginDirectEntry in interface BlockBuilder

beginBlockEntry

public SingleArrayBlockWriter beginBlockEntry()

Description copied from interface: BlockBuilder

Return a writer to the current entry. The caller can operate on the returned caller to incrementally build the object. This is generally more efficient than building the object elsewhere and call writeObject afterwards because a large chunk of memory could potentially be unnecessarily copied in this process.

Specified by:

beginBlockEntry in interface BlockBuilder

closeEntry

public BlockBuilder closeEntry()

Description copied from interface: BlockBuilder

Closes the current entry.

Specified by:

closeEntry in interface BlockBuilder

appendNull

public BlockBuilder appendNull()

Description copied from interface: Block

Returns a block that has an appended null at the end, no matter if the original block has null or not. The original block won't be modified.

Specified by:

appendNull in interface Block

Specified by:

appendNull in interface BlockBuilder

Overrides:

appendNull in class AbstractArrayBlock

readPositionFrom

public BlockBuilder readPositionFrom(io.airlift.slice.SliceInput input)

Description copied from interface: BlockBuilder

Read a single position from the input

Specified by:

readPositionFrom in interface BlockBuilder

build

public ArrayBlock build()

Description copied from interface: BlockBuilder

Builds the block. This method can be called multiple times.

Specified by:

build in interface BlockBuilder

newBlockBuilderLike

public BlockBuilder newBlockBuilderLike(BlockBuilderStatus blockBuilderStatus)

Description copied from interface: BlockBuilder

Creates a new block builder of the same type based on the current usage statistics of this block builder.

Specified by:

newBlockBuilderLike in interface BlockBuilder

newBlockBuilderLike

public BlockBuilder newBlockBuilderLike(BlockBuilderStatus blockBuilderStatus,
                                        int expectedEntries)

Description copied from interface: BlockBuilder

Creates a new block builder of the same type based on the expectedEntries and the current usage statistics of this block builder.

Specified by:

newBlockBuilderLike in interface BlockBuilder

toString

public String toString()

Overrides:

toString in class Object