Package org.apache.mina.core.file

Class DefaultFileRegion

java.lang.Object

org.apache.mina.core.file.DefaultFileRegion

All Implemented Interfaces:

FileRegion

Direct Known Subclasses:

FilenameFileRegion

public class DefaultFileRegion
extends Object
implements FileRegion

Manage a File to be sent to a remote host. We keep a track on the current position, and the number of already written bytes.

Author:

Apache MINA Project

Constructor Summary

Constructors

Constructor	Description
DefaultFileRegion(FileChannel channel)	Creates a new DefaultFileRegion instance
DefaultFileRegion(FileChannel channel, long position, long remainingBytes)	Creates a new DefaultFileRegion instance

Method Summary

Modifier and Type	Method	Description
FileChannel	getFileChannel()	The open FileChannel from which data will be read to send to remote host.
String	getFilename()	Provides an absolute filename for the underlying FileChannel.
long	getPosition()	The current file position from which data will be read.
long	getRemainingBytes()	The number of bytes remaining to be written from the file to the remote host.
long	getWrittenBytes()	The total number of bytes already written.
void	update(long value)	Updates the current file position based on the specified amount.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultFileRegion

public DefaultFileRegion(FileChannel channel)
                  throws IOException

Creates a new DefaultFileRegion instance

Parameters:

channel - The channel mapped over the file

Throws:

IOException - If we had an IO error

DefaultFileRegion

public DefaultFileRegion(FileChannel channel,
                         long position,
                         long remainingBytes)

Creates a new DefaultFileRegion instance

Parameters:

channel - The channel mapped over the file

position - The position in teh file

remainingBytes - The remaining bytes

Method Detail

getWrittenBytes

public long getWrittenBytes()

The total number of bytes already written.

Specified by:

getWrittenBytes in interface FileRegion

Returns:

The total number of bytes already written.

getRemainingBytes

public long getRemainingBytes()

The number of bytes remaining to be written from the file to the remote host.

Specified by:

getRemainingBytes in interface FileRegion

Returns:

The number of bytes remaining to be written.

getFileChannel

public FileChannel getFileChannel()

The open FileChannel from which data will be read to send to remote host.

Specified by:

getFileChannel in interface FileRegion

Returns:

An open FileChannel.

getPosition

public long getPosition()

The current file position from which data will be read.

Specified by:

getPosition in interface FileRegion

Returns:

The current file position.

update

public void update(long value)

Updates the current file position based on the specified amount. This increases the value returned by FileRegion.getPosition() and FileRegion.getWrittenBytes() by the given amount and decreases the value returned by FileRegion.getRemainingBytes() by the given amount.

Specified by:

update in interface FileRegion

Parameters:

value - The new value for the file position.

getFilename

public String getFilename()

Provides an absolute filename for the underlying FileChannel.

Specified by:

getFilename in interface FileRegion

Returns:

the absolute filename, or null if the FileRegion does not know the filename