com.facebook.presto.spi.block

Class AbstractSingleRowBlock

java.lang.Object

com.facebook.presto.spi.block.AbstractSingleRowBlock

All Implemented Interfaces:

Block

Direct Known Subclasses:

SingleRowBlock, SingleRowBlockWriter

public abstract class AbstractSingleRowBlock
extends Object
implements Block

Field Summary

Fields

Modifier and Type	Field and Description
protected int	numFields
protected int	startOffset

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSingleRowBlock(int startOffset, int numFields)

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.
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.
Block	copyPositions(List<Integer> positions) Returns a block containing the specified positions.
Block	copyRegion(int position, int length) Returns a block starting at the specified position and extends for the specified length.
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, int offset) Gets a byte at offset in the value at position.
protected abstract Block	getFieldBlock(int fieldIndex)
int	getInt(int position, int offset) Gets a little endian int at offset in the value at position.
long	getLong(int position, int offset) Gets a little endian long at offset in the value at position.
<T> T	getObject(int position, Class<T> clazz) Gets an object in the value at position.
Block	getRegion(int positionOffset, int length) Returns a block starting at the specified position and extends for the specified length.
long	getRegionSizeInBytes(int position, int length) Returns the logical size of block.getRegion(position, length) in memory.
short	getShort(int position, int offset) Gets a little endian short at offset 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.
int	getSliceLength(int position) Gets the length of the value at the position.
long	hash(int position, int offset, int length) Calculates the hash code the byte sequences at offset in the value at 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	writePositionTo(int position, BlockBuilder blockBuilder) Appends the value at position to blockBuilder.

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.spi.block.Block

assureLoaded, getEncoding, getPositionCount, getRetainedSizeInBytes, getSizeInBytes, retainedBytesForEachPart

Field Detail

startOffset

protected final int startOffset

numFields

protected final int numFields

Constructor Detail

AbstractSingleRowBlock

protected AbstractSingleRowBlock(int startOffset,
                                 int numFields)

Method Detail

getFieldBlock

protected abstract Block getFieldBlock(int fieldIndex)

isNull

public boolean isNull(int position)

Description copied from interface: Block

Is the specified position null?

Specified by:

isNull in interface Block

getByte

public byte getByte(int position,
                    int offset)

Description copied from interface: Block

Gets a byte at offset in the value at position.

Specified by:

getByte in interface Block

getShort

public short getShort(int position,
                      int offset)

Description copied from interface: Block

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

Specified by:

getShort in interface Block

getInt

public int getInt(int position,
                  int offset)

Description copied from interface: Block

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

Specified by:

getInt 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

getSliceLength

public int getSliceLength(int position)

Description copied from interface: Block

Gets the length of the value at the position. This method must be implemented if @{code getSlice} is implemented.

Specified by:

getSliceLength 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

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

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

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

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

getObject

public <T> T getObject(int position,
                       Class<T> clazz)

Description copied from interface: Block

Gets an object in the value at position.

Specified by:

getObject in interface Block

writePositionTo

public void writePositionTo(int position,
                            BlockBuilder blockBuilder)

Description copied from interface: Block

Appends the value at position to blockBuilder.

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 method must copy the data into a new 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

getRegionSizeInBytes

public long getRegionSizeInBytes(int position,
                                 int length)

Description copied from interface: Block

Returns the logical size of block.getRegion(position, length) in memory.

Specified by:

getRegionSizeInBytes in interface Block

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.

Specified by:

copyPositions in interface 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.

Specified by:

getRegion in interface Block

copyRegion

public Block copyRegion(int position,
                        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.

Specified by:

copyRegion in interface Block