org.axiondb.io

Class AxionFileSystem

public class AxionFileSystem extends Object

Axion File System, creates file input/output streams and wraps then into a custom BufferedDataStream, which improves perfermance significantly.

Version: $Revision: 1.8 $ $Date: 2005/12/20 18:32:58 $

Author: Ahimanikya Satapathy

Nested Class Summary
class	AxionFileSystem.PidxList

Constructor Summary
	AxionFileSystem()

Method Summary
void	closeInputStream(InputStream in)
void	closeOutputStream(OutputStream out)
BufferedDataOutputStream	createBufferedDOS(File file) create a new file and wrap wrap the stream with BufferedDataOutputStream which improves perfermance significantly.
DataOutputStream	createDataOutputSteam(File file)
boolean	createNewFile(File file)
ObjectOutputStream	createObjectOutputSteam(File file)
AxionFileSystem.PidxList	newPidxList(int count, File file, boolean readonly)
AxionInputStream	open(File file) Open the file in read only mode.
AxionOutputStream	open(File file, boolean overwrite) Open file in append mode if overwrite is false, otherwise create new file.
AxionOutputStream	openAppend(File file) Open file in append mode, position will be set to the end of file.
BufferedDataInputStream	openBufferedDIS(File file) Open file in read only mode, position will be set to 0. seek can be used to perferm random access.
BufferedDataOutputStream	openBufferedDOS(File file, long startPos) Open a outputsteam and points the file pointer to a given start position in the file.
BufferedDataOutputStream	openBufferedDOSAppend(File file, int bufferSize) Open file in append mode, position will be set to the end of file.
DataInputStream	openDataInputSteam(File file)
ObjectInputStream	openObjectInputSteam(File file)
IntList	parseIntFile(File file) Reads a list of int values from a file.
AxionFileSystem.PidxList	parseLongPidx(File file, boolean readOnly) Reads a list of long values from a file.
AxionFileSystem.PidxList	parseUnsignedIntPidx(File file, boolean readOnly)
void	readAll(File file, byte[] rawdata)
void	writeIntFile(File file, IntList list) Writes a list of `int` values to a file.
void	writeUnsignedInt(BufferedDataOutputStream out, long offset, int value) Updates an UnsignedInt value to a file.
void	writeUnsignedIntFile(File file, LongList list) Writes a list of `long` values to a file.

Method Detail

closeInputStream

public void closeInputStream(InputStream in)

closeOutputStream

public void closeOutputStream(OutputStream out)

createBufferedDOS

public BufferedDataOutputStream createBufferedDOS(File file)

create a new file and wrap wrap the stream with BufferedDataOutputStream which improves perfermance significantly.

createDataOutputSteam

public DataOutputStream createDataOutputSteam(File file)

createObjectOutputSteam

public ObjectOutputStream createObjectOutputSteam(File file)

newPidxList

public AxionFileSystem.PidxList newPidxList(int count, File file, boolean readonly)

open

public AxionInputStream open(File file)

Open the file in read only mode.

open

public AxionOutputStream open(File file, boolean overwrite)

Open file in append mode if overwrite is false, otherwise create new file.

openAppend

public AxionOutputStream openAppend(File file)

Open file in append mode, position will be set to the end of file. Creates the file if does not exist yet.

openBufferedDIS

public BufferedDataInputStream openBufferedDIS(File file)

Open file in read only mode, position will be set to 0. seek can be used to perferm random access. This will wrap the stream with BufferedDataInputStream which improves perfermance significantly.

openBufferedDOS

public BufferedDataOutputStream openBufferedDOS(File file, long startPos)

Open a outputsteam and points the file pointer to a given start position in the file.

openBufferedDOSAppend

public BufferedDataOutputStream openBufferedDOSAppend(File file, int bufferSize)

Open file in append mode, position will be set to the end of file. Creates the file if does not exist yet. This will wrap the stream with BufferedDataOutputStream which improves perfermance significantly.