Class MappedRandomAccessFile

java.lang.Object

com.itextpdf.text.pdf.MappedRandomAccessFile

public class MappedRandomAccessFile
extends Object

A MappedByteBuffer wrapped as a RandomAccessFile

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	BUFSIZE
private FileChannel	channel
private MappedByteBuffer[]	mappedBuffers
private long	pos
private long	size

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
static boolean	clean(ByteBuffer buffer)	invokes the clean method on the ByteBuffer's cleaner
void	close()
protected void	finalize()	invokes the close method
FileChannel	getChannel()
long	getFilePointer()
private void	init(FileChannel channel, 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 Object

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

Field Details

BUFSIZE

private static final int BUFSIZE

See Also:

• Constant Field Values

channel

private FileChannel channel

mappedBuffers

private MappedByteBuffer[] mappedBuffers

size

private long size

pos

private long pos

Constructor Details

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 Details

init

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

initializes the channel and mapped bytebuffer

Parameters:

channel - FileChannel

mapMode - FileChannel.MapMode

Throws:

IOException

getChannel

public FileChannel getChannel()

Since:

2.0.8

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

Overrides:

finalize in class Object

Throws:

Throwable

See Also:

• Object.finalize()

clean

public static boolean clean(ByteBuffer buffer)

invokes the clean method on the ByteBuffer's cleaner

Parameters:

buffer - ByteBuffer

Returns:

boolean true on success