ome.io.nio

Class FileBuffer

java.lang.Object

ome.io.nio.AbstractBuffer

ome.io.nio.FileBuffer

public class FileBuffer
extends AbstractBuffer

Raw file buffer which provides I/O operations within the OMERO file repository.

Since:

OMERO3.0

Version:

3.0 (Internal version: $Revision$ $Date: 2005/06/08 15:21:59 $)

Author:

Chris Allan callan@blackcat.ca

Constructor Summary

Constructors

Constructor and Description
FileBuffer(java.lang.String path, java.lang.String mode) Default constructor allowing to pass in a non-"rw" file mode.

Method Summary

Modifier and Type	Method and Description
void	close() Closes the buffer, cleaning up file state.
void	flush(boolean includeMetadata) Flush the buffer, writing any pending content to the underlying storage device, optionally also the file's metadata.
int	read(java.nio.ByteBuffer dst) Delegates to FileChannel
int	read(java.nio.ByteBuffer dst, long position) Delegates to FileChannel
long	size()
void	truncate(long size)
boolean	truncateIfSmaller(long size) Only truncate if the size of the file is less than the size argument.
int	write(java.nio.ByteBuffer src) Delegates to FileChannel
int	write(java.nio.ByteBuffer src, long position) Delegates to FileChannel

Methods inherited from class ome.io.nio.AbstractBuffer

getPath, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

FileBuffer

public FileBuffer(java.lang.String path,
                  java.lang.String mode)

Default constructor allowing to pass in a non-"rw" file mode.

Parameters:

path - path to the root of the File repository.

mode - will be passed to the constructor of RandomAccessFile

Throws:

java.io.FileNotFoundException

Method Detail

close

public void close()
           throws java.io.IOException

Closes the buffer, cleaning up file state.

Throws:

java.io.IOException - if an I/O error occurs.

flush

public void flush(boolean includeMetadata)
           throws java.io.IOException

Flush the buffer, writing any pending content to the underlying storage device, optionally also the file's metadata.

Parameters:

includeMetadata - flushes also the file metadata, not just the content

Throws:

java.io.IOException - an I/O error that occurred

read

public int read(java.nio.ByteBuffer dst)
         throws java.io.IOException

Delegates to FileChannel

Throws:

java.io.IOException

See Also:

FileChannel.read(ByteBuffer)

read

public int read(java.nio.ByteBuffer dst,
                long position)
         throws java.io.IOException

Delegates to FileChannel

Throws:

java.io.IOException

See Also:

FileChannel.read(ByteBuffer, long)

write

public int write(java.nio.ByteBuffer src,
                 long position)
          throws java.io.IOException

Delegates to FileChannel

Throws:

java.io.IOException

See Also:

FileChannel.write(ByteBuffer, long)

write

public int write(java.nio.ByteBuffer src)
          throws java.io.IOException

Delegates to FileChannel

Throws:

java.io.IOException

See Also:

FileChannel.write(ByteBuffer)

size

public long size()
          throws java.io.IOException

Throws:

java.io.IOException

truncate

public void truncate(long size)
              throws java.io.IOException

Throws:

java.io.IOException

truncateIfSmaller

public boolean truncateIfSmaller(long size)
                          throws java.io.IOException

Only truncate if the size of the file is less than the size argument.

Parameters:

size -

Returns:

true if truncation was performed.

Throws:

java.io.IOException