net.sourceforge.neurosdbm.db
Class MDB

java.lang.Object
  net.sourceforge.neurosdbm.db.MDB

Direct Known Subclasses:

AlbumsMDB, ArtistAlbumMDB, ArtistMDB, AudioMDB, FailedHiSiMDB, GenreMDB, IdedHiSiMDB, PlaylistMDB, RecordingsMDB, UnidedHiSiMDB

abstract class MDB

extends java.lang.Object

Field Summary

protected Word	attributes
protected Word	db_ID
protected DisplayData	db_Name
protected java.lang.String	fileName
protected java.util.Map	keysToMDBRecordsMap
protected java.util.Map	keysToWordPointersMap
protected int	nextKey
protected WordPointer	nullPtr
protected Word	numOfFieldsPerRecord
protected Word	numOfKeys
protected WordString	parentDBFilename
protected WordPointerToDisplayData	pDB_Name
protected WordPointerToWordString	pParentDBFilename
protected Rule[]	pRules
protected WordPointer	pXIM
protected WordPointer	recordStart
protected Word	status
protected boolean	useDBname
protected byte[]	ximData

Constructor Summary

protected

MDB(java.lang.String fileName)

Method Summary

(package private) void	computeHeaderPointers() This function computes the pointers used in the header.
(package private) void	deleteRecord(int key)
(package private) void	generatePointers()
(package private) int	getKey(WordPointer ptr)
(package private) MDBRecord	getMDBRecord(int key)
(package private) MDBRecord	getMDBRecord(java.lang.Integer key) Returns the MDB record given the key from this object's MDB database.
(package private) WordPointer	getPointer(int key)
protected int	numAccessKeys()
protected int	numExtraInfo()
protected void	parseMDBHeader(java.nio.ByteBuffer bytes)
java.lang.String	toString()
(package private) void	write()
protected void	write(NIOFile file)

Methods inherited from class java.lang.Object

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

Field Detail

fileName

protected java.lang.String fileName

attributes

protected Word attributes

useDBname

protected boolean useDBname

status

protected Word status

numOfKeys

protected Word numOfKeys

numOfFieldsPerRecord

protected Word numOfFieldsPerRecord

recordStart

protected WordPointer recordStart

pXIM

protected WordPointer pXIM

db_ID

protected Word db_ID

pDB_Name

protected WordPointerToDisplayData pDB_Name

pParentDBFilename

protected WordPointerToWordString pParentDBFilename

pRules

protected Rule[] pRules

db_Name

protected DisplayData db_Name

parentDBFilename

protected WordString parentDBFilename

ximData

protected byte[] ximData

nullPtr

protected WordPointer nullPtr

keysToMDBRecordsMap

protected java.util.Map keysToMDBRecordsMap

keysToWordPointersMap

protected java.util.Map keysToWordPointersMap

nextKey

protected int nextKey

Constructor Detail

MDB

protected MDB(java.lang.String fileName)

Method Detail

parseMDBHeader

protected void parseMDBHeader(java.nio.ByteBuffer bytes)

write

void write()
     throws java.io.IOException

Throws:

java.io.IOException

write

protected void write(NIOFile file)
              throws java.io.IOException,
                     DatabaseInternalCorruptionException

Throws:

java.io.IOException

DatabaseInternalCorruptionException

numAccessKeys

protected int numAccessKeys()

numExtraInfo

protected int numExtraInfo()

generatePointers

void generatePointers()

computeHeaderPointers

void computeHeaderPointers()

This function computes the pointers used in the header.

getMDBRecord

MDBRecord getMDBRecord(java.lang.Integer key)

Returns the MDB record given the key from this object's MDB database. The MDB record will have to be downcasted to a specific MDB record type.

Parameters:

key - The key!

Returns:

The record!

getMDBRecord

MDBRecord getMDBRecord(int key)

getKey

int getKey(WordPointer ptr)

getPointer

WordPointer getPointer(int key)

deleteRecord

void deleteRecord(int key)

toString

public java.lang.String toString()