jdbm.recman

Class PhysicalRowIdManager

java.lang.Object

jdbm.recman.PhysicalRowIdManager

final class PhysicalRowIdManager
extends java.lang.Object

This class manages physical row ids, and their data.

Constructor Summary

Constructors

Constructor and Description
PhysicalRowIdManager(RecordFile file, PageManager pageManager) Creates a new rowid manager using the indicated record file.

Method Summary

Methods

Modifier and Type	Method and Description
(package private) void	delete(Location rowid) Deletes a record.
(package private) byte[]	fetch(Location rowid) Retrieves a record.
(package private) Location	insert(byte[] data, int start, int length) Inserts a new record.
(package private) Location	update(Location rowid, byte[] data, int start, int length) Updates an existing record.

Methods inherited from class java.lang.Object

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

Constructor Detail

PhysicalRowIdManager

PhysicalRowIdManager(RecordFile file,
                    PageManager pageManager)
               throws java.io.IOException

Creates a new rowid manager using the indicated record file. and page manager.

Throws:

java.io.IOException

Method Detail

insert

Location insert(byte[] data,
              int start,
              int length)
          throws java.io.IOException

Inserts a new record. Returns the new physical rowid.

Throws:

java.io.IOException

update

Location update(Location rowid,
              byte[] data,
              int start,
              int length)
          throws java.io.IOException

Updates an existing record. Returns the possibly changed physical rowid.

Throws:

java.io.IOException

delete

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

Deletes a record.

Throws:

java.io.IOException

fetch

byte[] fetch(Location rowid)
       throws java.io.IOException

Retrieves a record.

Throws:

java.io.IOException