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 modelled as a short limits the block size to 32k.

Field Summary

(package private) BlockIo	block
(package private) short	pos
(package private) static int	SIZE

Constructor Summary

(package private)

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

Method Summary

(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

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