Class MappedRandomAccessFile

java.lang.Object

org.openpdf.text.pdf.MappedRandomAccessFile

All Implemented Interfaces:

AutoCloseable

public class MappedRandomAccessFile
extends Object
implements AutoCloseable

A MappedByteBuffer wrapped as a RandomAccessFile

Field Summary

Fields

Modifier and Type	Field	Description
private FileChannel	channel
private LongMappedByteBuffer	mappedByteBuffer

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
void	close()	Cleans the mapped bytebuffer and closes the channel
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, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

mappedByteBuffer

private LongMappedByteBuffer mappedByteBuffer

channel

private FileChannel channel

Constructor Details

MappedRandomAccessFile

public MappedRandomAccessFile(String filename,
 String mode)
                       throws IOException

Constructs a new MappedRandomAccessFile instance

Parameters:

filename - String

mode - String r, w or rw

Throws:

FileNotFoundException - on error

IOException - on error

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()

Returns:

FileChannel

Since:

2.0.8

read

public int read()

Returns:

int next byte value 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

Cleans the mapped bytebuffer and closes the channel

Specified by:

close in interface AutoCloseable

Throws:

IOException - on error

See Also:

• RandomAccessFile.close()