jdbm.recman

Class PhysicalRowId

java.lang.Object

jdbm.recman.PhysicalRowId

Direct Known Subclasses:

FreePhysicalRowId

class PhysicalRowId
extends java.lang.Object

A physical rowid is nothing else than a pointer to a physical location in a file - a (block, offset) tuple.

Note: The fact that the offset is modeled as a short limits the block size to 32k.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) BlockIo	block
private static short	O_BLOCK
private static short	O_OFFSET
(package private) short	pos
(package private) static int	SIZE

Constructor Summary

Constructors

Constructor and Description
PhysicalRowId(BlockIo block, short pos) Constructs a physical rowid from the indicated data starting at the indicated position.

Method Summary

Modifier and Type	Method and Description
(package private) long	getBlock() Returns the block number
(package private) short	getOffset() Returns the offset
(package private) void	setBlock(long value) Sets the block number
(package private) void	setOffset(short value) Sets the offset

Methods inherited from class java.lang.Object

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

Field Detail

O_BLOCK

private static final short O_BLOCK

See Also:

Constant Field Values

O_OFFSET

private static final short O_OFFSET

See Also:

Constant Field Values

SIZE

static final int SIZE

See Also:

Constant Field Values

block

BlockIo block

pos

short pos

Constructor Detail

PhysicalRowId

PhysicalRowId(BlockIo block,
              short pos)

Constructs a physical rowid from the indicated data starting at the indicated position.

Method Detail

getBlock

long getBlock()

Returns the block number

setBlock

void setBlock(long value)

Sets the block number

getOffset

short getOffset()

Returns the offset

setOffset

void setOffset(short value)

Sets the offset