jdbm.recman

Class LogicalRowIdManager

java.lang.Object

jdbm.recman.LogicalRowIdManager

final class LogicalRowIdManager
extends java.lang.Object

This class manages the linked lists of logical rowid pages.

Constructor Summary

Constructors

Constructor and Description
LogicalRowIdManager(RecordFile file, PageManager pageman) Creates a log rowid manager using the indicated record file and page manager

Method Summary

Methods

Modifier and Type	Method and Description
(package private) void	delete(Location rowid) Releases the indicated logical rowid.
(package private) Location	fetch(Location rowid) Returns a mapping
(package private) Location	insert(Location loc) Creates a new logical rowid pointing to the indicated physical id
(package private) void	update(Location rowid, Location loc) Updates the mapping

Methods inherited from class java.lang.Object

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

Constructor Detail

LogicalRowIdManager

LogicalRowIdManager(RecordFile file,
                   PageManager pageman)
              throws java.io.IOException

Creates a log rowid manager using the indicated record file and page manager

Throws:

java.io.IOException

Method Detail

insert

Location insert(Location loc)
          throws java.io.IOException

Creates a new logical rowid pointing to the indicated physical id

Throws:

java.io.IOException

delete

void delete(Location rowid)
      throws java.io.IOException

Releases the indicated logical rowid.

Throws:

java.io.IOException

update

void update(Location rowid,
          Location loc)
      throws java.io.IOException

Updates the mapping

Parameters:

rowid - The logical rowid

loc - The physical rowid

Throws:

java.io.IOException

fetch

Location fetch(Location rowid)
         throws java.io.IOException

Returns a mapping

Parameters:

rowid - The logical rowid

Returns:

The physical rowid

Throws:

java.io.IOException