com.lowagie.text.pdf
Class MappedRandomAccessFile

java.lang.Object
  com.lowagie.text.pdf.MappedRandomAccessFile

public class MappedRandomAccessFile

extends Object

A MappedByteBuffer wrapped as a RandomAccessFile

Author:

Joakim Sandstroem Created on 6.9.2006

Field Summary

private java.nio.channels.FileChannel	channel
private java.nio.MappedByteBuffer	mappedByteBuffer

Constructor Summary

MappedRandomAccessFile(String filename, String mode)
Constructs a new MappedRandomAccessFile instance

Method Summary

static boolean	clean(java.nio.ByteBuffer buffer) invokes the clean method on the ByteBuffer's cleaner
void	close()
protected void	finalize() invokes the close method
long	getFilePointer()
private void	init(java.nio.channels.FileChannel channel, java.nio.channels.FileChannel.MapMode mapMode) initializes the channel and mapped bytebuffer
long	length()
int	read()
int	read(byte[] bytes, int off, int len)
void	seek(long pos)

Methods inherited from class java.lang.Object

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

Field Detail

mappedByteBuffer

private java.nio.MappedByteBuffer mappedByteBuffer

channel

private java.nio.channels.FileChannel channel

Constructor Detail

MappedRandomAccessFile

public MappedRandomAccessFile(String filename,
                              String mode)
                       throws FileNotFoundException,
                              IOException

Constructs a new MappedRandomAccessFile instance

Parameters:

filename - String

mode - String r, w or rw

Throws:

FileNotFoundException

IOException

Method Detail

init

private void init(java.nio.channels.FileChannel channel,
                  java.nio.channels.FileChannel.MapMode mapMode)
           throws IOException

initializes the channel and mapped bytebuffer

Parameters:

channel - FileChannel

mapMode - FileChannel.MapMode

Throws:

IOException

read

public int read()

Returns:

int next integer or -1 on EOF

See Also:

RandomAccessFile.read()

read

public int read(byte[] bytes,
                int off,
                int len)

Parameters:

bytes - byte[]

off - int offset

len - int length

Returns:

int bytes read or -1 on EOF

See Also:

RandomAccessFile.read(byte[], int, int)

getFilePointer

public long getFilePointer()

Returns:

long

See Also:

RandomAccessFile.getFilePointer()

seek

public void seek(long pos)

Parameters:

pos - long position

See Also:

RandomAccessFile.seek(long)

length

public long length()

Returns:

long length

See Also:

RandomAccessFile.length()

close

public void close()
           throws IOException

Throws:

IOException

See Also:

Cleans the mapped bytebuffer and closes the channel

finalize

protected void finalize()
                 throws Throwable

invokes the close method

Throws:

Throwable

See Also:

Object.finalize()

clean

public static boolean clean(java.nio.ByteBuffer buffer)

invokes the clean method on the ByteBuffer's cleaner

Parameters:

buffer - ByteBuffer

Returns:

boolean true on success