com.alexkasko.unsafe.offheapstruct

Class OffHeapStructComparator.OffHeapStructIndexAccessor

java.lang.Object

com.alexkasko.unsafe.offheapstruct.OffHeapStructComparator.OffHeapStructIndexAccessor

All Implemented Interfaces:

OffHeapStructAccessor

Enclosing class:

OffHeapStructComparator

private static class OffHeapStructComparator.OffHeapStructIndexAccessor
extends Object
implements OffHeapStructAccessor

Struct's accessor implementation for off-heap stored structs

Author:

alexkasko Date: 9/13/13

Field Summary

Fields

Modifier and Type	Field and Description
private OffHeapStructCollection	col
private long	index

Constructor Summary

Constructors

Modifier	Constructor and Description
private	OffHeapStructComparator.OffHeapStructIndexAccessor(OffHeapStructCollection col) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
void	get(byte[] buffer) Copies struct into specified buffer
void	get(int srcPos, byte[] dest, int destPos, int length) Copies part of struct into specified buffer
byte	getByte(int offset) Gets byte from struct with specified offset
int	getInt(int offset) Gets four bytes as int from struct with specified offset
long	getLong(int offset) Gets long from struct with specified offset
short	getShort(int offset) Gets two bytes as short from struct with specified offset
short	getUnsignedByte(int offset) Gets one byte (stored as one signed byte) from struct on specified index with specified offset, converts it to unsigned and returns it as short
long	getUnsignedInt(int offset) Gets unsigned int (stored as 4 bytes) and returns it as long from struct with specified offset
int	getUnsignedShort(int offset) Gets unsigned short (stored as two bytes) from struct on specified index with specified offset and returns it as int
private void	setIndex(long index) Sets index value
int	structLength() Returns length of the single struct in bytes
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

col

private final OffHeapStructCollection col

index

private long index

Constructor Detail

OffHeapStructComparator.OffHeapStructIndexAccessor

private OffHeapStructComparator.OffHeapStructIndexAccessor(OffHeapStructCollection col)

Constructor

Parameters:

col - collection to access structs from

Method Detail

structLength

public int structLength()

Returns length of the single struct in bytes

Specified by:

structLength in interface OffHeapStructAccessor

Returns:

length of the single struct in bytes

get

public void get(byte[] buffer)

Copies struct into specified buffer

Specified by:

get in interface OffHeapStructAccessor

Parameters:

buffer - buffer to copy struct into

get

public void get(int srcPos,
       byte[] dest,
       int destPos,
       int length)

Copies part of struct into specified buffer

Specified by:

get in interface OffHeapStructAccessor

getByte

public byte getByte(int offset)

Gets byte from struct with specified offset

Specified by:

getByte in interface OffHeapStructAccessor

Parameters:

offset - byte array index

Returns:

byte

getUnsignedByte

public short getUnsignedByte(int offset)

Gets one byte (stored as one signed byte) from struct on specified index with specified offset, converts it to unsigned and returns it as short

Specified by:

getUnsignedByte in interface OffHeapStructAccessor

Parameters:

offset - byte array index

Returns:

unsigned byte as short

getShort

public short getShort(int offset)

Gets two bytes as short from struct with specified offset

Specified by:

getShort in interface OffHeapStructAccessor

Parameters:

offset - byte array offset

Returns:

short value

getUnsignedShort

public int getUnsignedShort(int offset)

Gets unsigned short (stored as two bytes) from struct on specified index with specified offset and returns it as int

Specified by:

getUnsignedShort in interface OffHeapStructAccessor

Parameters:

offset - byte array offset

Returns:

unsigned short as int

getInt

public int getInt(int offset)

Gets four bytes as int from struct with specified offset

Specified by:

getInt in interface OffHeapStructAccessor

Parameters:

offset - byte array offset

Returns:

int value

getUnsignedInt

public long getUnsignedInt(int offset)

Gets unsigned int (stored as 4 bytes) and returns it as long from struct with specified offset

Specified by:

getUnsignedInt in interface OffHeapStructAccessor

Parameters:

offset - byte array offset

Returns:

unsigned int as long

getLong

public long getLong(int offset)

Gets long from struct with specified offset

Specified by:

getLong in interface OffHeapStructAccessor

Parameters:

offset - byte array offset

Returns:

long value

setIndex

private void setIndex(long index)

Sets index value

Parameters:

index - index value

toString

public String toString()

Overrides:

toString in class Object