Class FileCacheSeekableStream.FileCache

java.lang.Object

com.twelvemonkeys.io.AbstractCachedSeekableStream.StreamCache

com.twelvemonkeys.io.FileCacheSeekableStream.FileCache

Enclosing class:

FileCacheSeekableStream

static final class FileCacheSeekableStream.FileCache
extends AbstractCachedSeekableStream.StreamCache

Version:

$Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/io/FileCacheSeekableStream.java#5 $

Field Summary

Fields

Modifier and Type	Field	Description
private RandomAccessFile	cacheFile

Constructor Summary

Constructors

Constructor	Description
FileCache(File pFile)

Method Summary

Modifier and Type	Method	Description
(package private) void	close()
long	getPosition()	Returns the current cache read/write position.
int	read()	Reads a single byte a the current read/write position.
int	read(byte[] pBuffer, int pOffset, int pLength)	Writes a series of bytes at the current read/write position.
void	seek(long pPosition)	Repositions the current cache read/write position to the given position.
void	write(byte[] pBuffer, int pOffset, int pLength)	Writes a series of bytes at the current read/write position.
void	write(int pByte)	Writes a single byte at the current read/write position.

Methods inherited from class AbstractCachedSeekableStream.StreamCache

flush

Methods inherited from class Object

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

Field Details

cacheFile

private RandomAccessFile cacheFile

Constructor Details

FileCache

public FileCache(File pFile)
          throws FileNotFoundException

Throws:

FileNotFoundException

Method Details

write

public void write(int pByte)
           throws IOException

Description copied from class: AbstractCachedSeekableStream.StreamCache

Writes a single byte at the current read/write position. The read/write position will be increased by one.

Specified by:

write in class AbstractCachedSeekableStream.StreamCache

Parameters:

pByte - the byte value to write.

Throws:

IOException - if an I/O exception occurs in the cache backing mechanism.

write

public void write(byte[] pBuffer,
 int pOffset,
 int pLength)
           throws IOException

Description copied from class: AbstractCachedSeekableStream.StreamCache

Writes a series of bytes at the current read/write position. The read/write position will be increased by pLength.

This implementation invokes AbstractCachedSeekableStream.StreamCache.write(int) pLength times. Subclasses may override this method for performance.

Overrides:

write in class AbstractCachedSeekableStream.StreamCache

Parameters:

pBuffer - the bytes to write.

pOffset - the starting offset into the buffer.

pLength - the number of bytes to write from the buffer.

Throws:

IOException - if an I/O exception occurs in the cache backing mechanism.

read

public int read()
         throws IOException

Description copied from class: AbstractCachedSeekableStream.StreamCache

Reads a single byte a the current read/write position. The read/write position will be increased by one.

Specified by:

read in class AbstractCachedSeekableStream.StreamCache

Returns:

the value read, or -1 to indicate EOF.

Throws:

IOException - if an I/O exception occurs in the cache backing mechanism.

read

public int read(byte[] pBuffer,
 int pOffset,
 int pLength)
         throws IOException

Description copied from class: AbstractCachedSeekableStream.StreamCache

Writes a series of bytes at the current read/write position. The read/write position will be increased by pLength.

This implementation invokes AbstractCachedSeekableStream.StreamCache.read() pLength times. Subclasses may override this method for performance.

Overrides:

read in class AbstractCachedSeekableStream.StreamCache

Parameters:

pBuffer - the bytes to write

pOffset - the starting offset into the buffer.

pLength - the number of bytes to write from the buffer.

Returns:

the number of bytes read, or -1 to indicate EOF.

Throws:

IOException - if an I/O exception occurs in the cache backing mechanism.

seek

public void seek(long pPosition)
          throws IOException

Description copied from class: AbstractCachedSeekableStream.StreamCache

Repositions the current cache read/write position to the given position.

Specified by:

seek in class AbstractCachedSeekableStream.StreamCache

Parameters:

pPosition - the new read/write position

Throws:

IOException - if an I/O exception occurs in the cache backing mechanism.

getPosition

public long getPosition()
                 throws IOException

Description copied from class: AbstractCachedSeekableStream.StreamCache

Returns the current cache read/write position.

Specified by:

getPosition in class AbstractCachedSeekableStream.StreamCache

Returns:

the current cache read/write postion.

Throws:

IOException - if the position can't be determined because of a problem in the cache backing mechanism.

close

void close()
    throws IOException

Specified by:

close in class AbstractCachedSeekableStream.StreamCache

Throws:

IOException