com.facebook.presto.spi.block

Class AbstractVariableWidthBlock

java.lang.Object

com.facebook.presto.spi.block.AbstractVariableWidthBlock

All Implemented Interfaces:

Block

Direct Known Subclasses:

LazySliceArrayBlock, SliceArrayBlock, VariableWidthBlock, VariableWidthBlockBuilder

public abstract class AbstractVariableWidthBlock
extends Object
implements Block

Constructor Summary

Constructors

Constructor and Description
AbstractVariableWidthBlock()

Method Summary

Methods

Modifier and Type	Method and Description
void	assureLoaded() Assures that all data for the block is in memory.
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.
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.
double	getDouble(int position, int offset) Gets a little endian double at offset in the value at position.
BlockEncoding	getEncoding() Get the encoding for this block.
float	getFloat(int position, int offset) Gets a little endian float at offset in the value at position.
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.
protected abstract int	getPositionOffset(int position)
protected abstract io.airlift.slice.Slice	getRawSlice(int position)
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	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.

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

getLength, getPositionCount, getRegion, getSizeInBytes

Constructor Detail

AbstractVariableWidthBlock

public AbstractVariableWidthBlock()

Method Detail

getRawSlice

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

getPositionOffset

protected abstract int getPositionOffset(int position)

isEntryNull

protected abstract boolean isEntryNull(int position)

getEncoding

public BlockEncoding getEncoding()

Description copied from interface: Block

Get the encoding for this block.

Specified by:

getEncoding 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

getFloat

public float getFloat(int position,
             int offset)

Description copied from interface: Block

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

Specified by:

getFloat in interface Block

getDouble

public double getDouble(int position,
               int offset)

Description copied from interface: Block

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

Specified by:

getDouble 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.

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.

Specified by:

bytesEqual in interface Block

hash

public int 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.

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.

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.

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.

Specified by:

writeBytesTo 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

isNull

public boolean isNull(int position)

Description copied from interface: Block

Is the specified position null?

Specified by:

isNull in interface 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