Package eu.svjatoslav.sixth.data.store.file

Class MetaData

java.lang.Object

eu.svjatoslav.sixth.data.store.file.MetaData

public class MetaData
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static int	FILE_LOCATION_ENTRY_ALLOCATION_TABLE_START

Constructor Summary

Constructors

Constructor	Description
MetaData(FileDataStore dataStore)

Method Summary

Modifier and Type	Method	Description
long	allocateStorageSpace(int amountOfBytes)
void	decreaseUsedEntriesCount()
void	ensureMinimumCurrentLocation(long minimumLocation)
boolean	entriesTableNeedsIncreasing()
long	getEntriesStorageAreaStart()
long	getEntriesStorageAreaStart(int hypotheticalEntriesTableSize)
int	getEntriesTableSize()
int	getNewEntryId()
void	increaseUsedEntriesCount()
void	initializeNewFile()
void	readFileHeader()
void	setCurrentLocation(long currentLocation)
void	setEntriesTableSize(int newSize)
void	writeFileHeader()

Methods inherited from class java.lang.Object

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

Field Detail

FILE_LOCATION_ENTRY_ALLOCATION_TABLE_START

public static final int FILE_LOCATION_ENTRY_ALLOCATION_TABLE_START

See Also:

Constant Field Values

Constructor Detail

MetaData

public MetaData(FileDataStore dataStore)

Method Detail

allocateStorageSpace

public long allocateStorageSpace(int amountOfBytes)

Returns:

address of the start of the allocated space

decreaseUsedEntriesCount

public void decreaseUsedEntriesCount()

ensureMinimumCurrentLocation

public void ensureMinimumCurrentLocation(long minimumLocation)

entriesTableNeedsIncreasing

public boolean entriesTableNeedsIncreasing()

getEntriesStorageAreaStart

public long getEntriesStorageAreaStart()

getEntriesStorageAreaStart

public long getEntriesStorageAreaStart(int hypotheticalEntriesTableSize)

getEntriesTableSize

public int getEntriesTableSize()

Returns:

amount of entries in the entries table

setEntriesTableSize

public void setEntriesTableSize(int newSize)

getNewEntryId

public int getNewEntryId()

increaseUsedEntriesCount

public void increaseUsedEntriesCount()

initializeNewFile

public void initializeNewFile()
                       throws IOException

Throws:

IOException

readFileHeader

public void readFileHeader()
                    throws IOException

Throws:

IOException

setCurrentLocation

public void setCurrentLocation(long currentLocation)

writeFileHeader

public void writeFileHeader()
                     throws IOException

Throws:

IOException