org.axiondb.io

Class AxionFileSystem

java.lang.Object

org.axiondb.io.AxionFileSystem

public class AxionFileSystem
extends java.lang.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 $

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	AxionFileSystem.PidxList

Constructor Summary

Constructors

Constructor and Description
AxionFileSystem()

Method Summary

Modifier and Type	Method and Description
void	closeInputStream(java.io.InputStream in)
void	closeOutputStream(java.io.OutputStream out)
BufferedDataOutputStream	createBufferedDOS(java.io.File file) create a new file and wrap wrap the stream with BufferedDataOutputStream which improves perfermance significantly.
java.io.DataOutputStream	createDataOutputSteam(java.io.File file)
boolean	createNewFile(java.io.File file)
java.io.ObjectOutputStream	createObjectOutputSteam(java.io.File file)
AxionFileSystem.PidxList	newPidxList(int count, java.io.File file, boolean readonly)
AxionInputStream	open(java.io.File file) Open the file in read only mode.
AxionOutputStream	open(java.io.File file, boolean overwrite) Open file in append mode if overwrite is false, otherwise create new file.
AxionOutputStream	openAppend(java.io.File file) Open file in append mode, position will be set to the end of file.
BufferedDataInputStream	openBufferedDIS(java.io.File file) Open file in read only mode, position will be set to 0.
BufferedDataOutputStream	openBufferedDOS(java.io.File file, long startPos) Open a outputsteam and points the file pointer to a given start position in the file.
BufferedDataOutputStream	openBufferedDOSAppend(java.io.File file, int bufferSize) Open file in append mode, position will be set to the end of file.
java.io.DataInputStream	openDataInputSteam(java.io.File file)
java.io.ObjectInputStream	openObjectInputSteam(java.io.File file)
org.apache.commons.collections.primitives.IntList	parseIntFile(java.io.File file) Reads a list of int values from a file.
AxionFileSystem.PidxList	parseLongPidx(java.io.File file, boolean readOnly) Reads a list of long values from a file.
AxionFileSystem.PidxList	parseUnsignedIntPidx(java.io.File file, boolean readOnly)
void	readAll(java.io.File file, byte[] rawdata)
void	writeIntFile(java.io.File file, org.apache.commons.collections.primitives.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(java.io.File file, org.apache.commons.collections.primitives.LongList list) Writes a list of long values to a file.

Methods inherited from class java.lang.Object

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

Constructor Detail

AxionFileSystem

public AxionFileSystem()

Method Detail

closeInputStream

public void closeInputStream(java.io.InputStream in)

closeOutputStream

public void closeOutputStream(java.io.OutputStream out)

createBufferedDOS

public BufferedDataOutputStream createBufferedDOS(java.io.File file)
                                           throws AxionException

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

Throws:

AxionException

createNewFile

public boolean createNewFile(java.io.File file)
                      throws AxionException

Throws:

AxionException

createObjectOutputSteam

public java.io.ObjectOutputStream createObjectOutputSteam(java.io.File file)
                                                   throws java.io.IOException

Throws:

java.io.IOException

createDataOutputSteam

public java.io.DataOutputStream createDataOutputSteam(java.io.File file)
                                               throws java.io.IOException

Throws:

java.io.IOException

newPidxList

public AxionFileSystem.PidxList newPidxList(int count,
                                            java.io.File file,
                                            boolean readonly)
                                     throws AxionException

Throws:

AxionException

open

public AxionInputStream open(java.io.File file)
                      throws java.io.IOException

Open the file in read only mode.

Throws:

java.io.IOException

open

public AxionOutputStream open(java.io.File file,
                              boolean overwrite)
                       throws java.io.IOException

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

Throws:

java.io.IOException

openAppend

public AxionOutputStream openAppend(java.io.File file)
                             throws java.io.IOException

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

Throws:

java.io.IOException

openBufferedDIS

public BufferedDataInputStream openBufferedDIS(java.io.File file)
                                        throws AxionException

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.

Throws:

AxionException

openBufferedDOS

public BufferedDataOutputStream openBufferedDOS(java.io.File file,
                                                long startPos)
                                         throws AxionException

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

Throws:

AxionException

openBufferedDOSAppend

public BufferedDataOutputStream openBufferedDOSAppend(java.io.File file,
                                                      int bufferSize)
                                               throws AxionException

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.

Throws:

AxionException

openObjectInputSteam

public java.io.ObjectInputStream openObjectInputSteam(java.io.File file)
                                               throws java.io.IOException

Throws:

java.io.IOException

openDataInputSteam

public java.io.DataInputStream openDataInputSteam(java.io.File file)
                                           throws java.io.IOException

Throws:

java.io.IOException

parseIntFile

public org.apache.commons.collections.primitives.IntList parseIntFile(java.io.File file)
                                                               throws AxionException

Reads a list of int values from a file.

Parameters:

file - the Fileto read from

Throws:

AxionException

parseLongPidx

public AxionFileSystem.PidxList parseLongPidx(java.io.File file,
                                              boolean readOnly)
                                       throws AxionException

Reads a list of long values from a file.

Parameters:

file - the Fileto read from

Throws:

AxionException

parseUnsignedIntPidx

public AxionFileSystem.PidxList parseUnsignedIntPidx(java.io.File file,
                                                     boolean readOnly)
                                              throws AxionException

Throws:

AxionException

readAll

public void readAll(java.io.File file,
                    byte[] rawdata)
             throws AxionException

Throws:

AxionException

writeIntFile

public void writeIntFile(java.io.File file,
                         org.apache.commons.collections.primitives.IntList list)
                  throws AxionException

Writes a list of int values to a file.

Parameters:

file - the Fileto write to

Throws:

AxionException

writeUnsignedInt

public void writeUnsignedInt(BufferedDataOutputStream out,
                             long offset,
                             int value)
                      throws AxionException

Updates an UnsignedInt value to a file.

Parameters:

raf - the Fileto append to

offset - the pidx file offset to write

value - data file pointer for a given pidx offset

Throws:

AxionException

writeUnsignedIntFile

public void writeUnsignedIntFile(java.io.File file,
                                 org.apache.commons.collections.primitives.LongList list)
                          throws AxionException

Writes a list of long values to a file.

Parameters:

file - the Fileto write to

Throws:

AxionException