com.facebook.presto.common.block

Class AbstractVariableWidthBlock

java.lang.Object

com.facebook.presto.common.block.AbstractVariableWidthBlock

All Implemented Interfaces:

Block, UncheckedBlock

Direct Known Subclasses:

AbstractVariableWidthBlockBuilder, VariableWidthBlock

public abstract class AbstractVariableWidthBlock
extends Object
implements Block

Constructor Summary

Constructors

Constructor and Description
AbstractVariableWidthBlock()

Method Summary

Modifier and Type	Method and Description
int	bytesCompare(int position, int offset, int length, io.airlift.slice.Slice otherSlice, int otherOffset, int otherLength) Compares the byte sequences at offset in the value at position to the byte sequence at otherOffset in otherSlice.
boolean	bytesEqual(int position, int offset, io.airlift.slice.Slice otherSlice, int otherOffset, int length) Is the byte sequences at offset in the value at position equal to the byte sequence at otherOffset in otherSlice.
protected void	checkReadablePosition(int position)
int	compareTo(int position, int offset, int length, Block otherBlock, int otherPosition, int otherOffset, int otherLength) Compares the byte sequences at offset in the value at position to the byte sequence at otherOffset in the value at otherPosition in otherBlock.
boolean	equals(int position, int offset, Block otherBlock, int otherPosition, int otherOffset, int length) Is the byte sequences at offset in the value at position equal to the byte sequence at otherOffset in the value at otherPosition in otherBlock.
byte	getByte(int position) Gets a byte in the value at position.
String	getEncodingName() Get the encoding for this block.
long	getEstimatedDataSizeForStats(int position) Returns the estimated in memory data size for stats of position.
int	getInt(int position) Gets a little endian int in the value at position.
long	getLong(int position) Gets a little endian long in the value at position.
long	getLong(int position, int offset) Gets a little endian long at offset in the value at position.
abstract int	getPositionOffset(int position)
abstract io.airlift.slice.Slice	getRawSlice(int position)
short	getShort(int position) Gets a little endian short at in the value at position.
Block	getSingleValueBlock(int position) Gets the value at the specified position as a single element block.
io.airlift.slice.Slice	getSlice(int position, int offset, int length) Gets a slice at offset in the value at position.
long	hash(int position, int offset, int length) Calculates the hash code the byte sequences at offset in the value at position.
protected abstract boolean	isEntryNull(int position)
boolean	isNull(int position) Is the specified position null?
void	writeBytesTo(int position, int offset, int length, BlockBuilder blockBuilder) Appends the byte sequences at offset in the value at position to blockBuilder.
void	writeBytesTo(int position, int offset, int length, io.airlift.slice.SliceOutput sliceOutput) Appends the byte sequences at offset in the value at position to sliceOutput.
void	writePositionTo(int position, BlockBuilder blockBuilder) Appends the value at position to blockBuilder and close the entry.
void	writePositionTo(int position, io.airlift.slice.SliceOutput output) Appends the value at position to output.

Methods inherited from class java.lang.Object

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

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

appendNull, copyPositions, copyRegion, fixedSizeInBytesPerPosition, getApproximateRegionLogicalSizeInBytes, getBlock, getLoadedBlock, getLogicalSizeInBytes, getPositionCount, getPositions, getPositionsSizeInBytes, getRegion, getRegionLogicalSizeInBytes, getRegionSizeInBytes, getRetainedSizeInBytes, getSizeInBytes, getSliceLength, mayHaveNull, retainedBytesForEachPart

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

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

Constructor Detail

AbstractVariableWidthBlock

public AbstractVariableWidthBlock()

Method Detail

getRawSlice

public abstract io.airlift.slice.Slice getRawSlice(int position)

getPositionOffset

public abstract int getPositionOffset(int position)

isEntryNull

protected abstract boolean isEntryNull(int position)

getEncodingName

public String getEncodingName()

Description copied from interface: Block

Get the encoding for this block.

Specified by:

getEncodingName in interface Block

getByte

public byte getByte(int position)

Description copied from interface: Block

Gets a byte in the value at position.

Specified by:

getByte in interface Block

getShort

public short getShort(int position)

Description copied from interface: Block

Gets a little endian short at in the value at position.

Specified by:

getShort in interface Block

getInt

public int getInt(int position)

Description copied from interface: Block

Gets a little endian int in the value at position.

Specified by:

getInt in interface Block

getLong

public long getLong(int position)

Description copied from interface: Block

Gets a little endian long in the value at position.

Specified by:

getLong in interface Block

getLong

public long getLong(int position,
                    int offset)

Description copied from interface: Block

Gets a little endian long at offset in the value at position.

Specified by:

getLong in interface Block

getSlice

public io.airlift.slice.Slice getSlice(int position,
                                       int offset,
                                       int length)

Description copied from interface: Block

Gets a slice at offset in the value at position.

Specified by:

getSlice in interface Block

equals

public boolean equals(int position,
                      int offset,
                      Block otherBlock,
                      int otherPosition,
                      int otherOffset,
                      int length)

Description copied from interface: Block

Is the byte sequences at offset in the value at position equal to the byte sequence at otherOffset in the value at otherPosition in otherBlock. This method must be implemented if @{code getSlice} is implemented.

Specified by:

equals in interface Block

bytesEqual

public boolean bytesEqual(int position,
                          int offset,
                          io.airlift.slice.Slice otherSlice,
                          int otherOffset,
                          int length)

Description copied from interface: Block

Is the byte sequences at offset in the value at position equal to the byte sequence at otherOffset in otherSlice. This method must be implemented if @{code getSlice} is implemented.

Specified by:

bytesEqual in interface Block

hash

public long hash(int position,
                 int offset,
                 int length)

Description copied from interface: Block

Calculates the hash code the byte sequences at offset in the value at position. This method must be implemented if @{code getSlice} is implemented.

Specified by:

hash in interface Block

compareTo

public int compareTo(int position,
                     int offset,
                     int length,
                     Block otherBlock,
                     int otherPosition,
                     int otherOffset,
                     int otherLength)

Description copied from interface: Block

Compares the byte sequences at offset in the value at position to the byte sequence at otherOffset in the value at otherPosition in otherBlock. This method must be implemented if @{code getSlice} is implemented.

Specified by:

compareTo in interface Block

bytesCompare

public int bytesCompare(int position,
                        int offset,
                        int length,
                        io.airlift.slice.Slice otherSlice,
                        int otherOffset,
                        int otherLength)

Description copied from interface: Block

Compares the byte sequences at offset in the value at position to the byte sequence at otherOffset in otherSlice. This method must be implemented if @{code getSlice} is implemented.

Specified by:

bytesCompare in interface Block

writeBytesTo

public void writeBytesTo(int position,
                         int offset,
                         int length,
                         BlockBuilder blockBuilder)

Description copied from interface: Block

Appends the byte sequences at offset in the value at position to blockBuilder. This method must be implemented if @{code getSlice} is implemented.

Specified by:

writeBytesTo in interface Block

writeBytesTo

public void writeBytesTo(int position,
                         int offset,
                         int length,
                         io.airlift.slice.SliceOutput sliceOutput)

Description copied from interface: Block

Appends the byte sequences at offset in the value at position to sliceOutput. This method must be implemented if @{code getSlice} is implemented.

Specified by:

writeBytesTo in interface Block

writePositionTo

public void writePositionTo(int position,
                            BlockBuilder blockBuilder)

Description copied from interface: Block

Appends the value at position to blockBuilder and close the entry.

Specified by:

writePositionTo in interface Block

writePositionTo

public void writePositionTo(int position,
                            io.airlift.slice.SliceOutput output)

Description copied from interface: Block

Appends the value at position to output.

Specified by:

writePositionTo in interface Block

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

getEstimatedDataSizeForStats

public long getEstimatedDataSizeForStats(int position)

Description copied from interface: Block

Returns the estimated in memory data size for stats of position. Do not use it for other purpose.

Specified by:

getEstimatedDataSizeForStats in interface Block

isNull

public boolean isNull(int position)

Description copied from interface: Block

Is the specified position null?

Specified by:

isNull in interface Block

checkReadablePosition

protected void checkReadablePosition(int position)