xerial.larray.mmap

Class MMapBuffer

java.lang.Object

xerial.larray.buffer.LBufferAPI

xerial.larray.mmap.MMapBuffer

public class MMapBuffer
extends xerial.larray.buffer.LBufferAPI

Memory-mapped file buffer

Field Summary

Fields inherited from class xerial.larray.buffer.LBufferAPI

m

Constructor Summary

Constructors

Constructor and Description
MMapBuffer(java.io.File f, long offset, long size, MMapMode mode) Open an memory mapped file.
MMapBuffer(java.io.File f, MMapMode mode) Open an memory mapped file.

Method Summary

Modifier and Type	Method and Description
long	address()
void	close() Close the memory mapped file.
void	flush() Forces any changes made to this buffer to be written to the file
protected long	offset()

Methods inherited from class xerial.larray.buffer.LBufferAPI

apply, apply, clear, copyTo, copyTo, fill, getByte, getByte, getChar, getChar, getDouble, getDouble, getFloat, getFloat, getInt, getInt, getLong, getLong, getShort, getShort, loadFrom, putByte, putByte, putChar, putChar, putDouble, putDouble, putFloat, putFloat, putInt, putInt, putLong, putLong, putShort, putShort, readFrom, readFrom, readFrom, release, size, slice, toArray, toDirectByteBuffer, toDirectByteBuffers, toDirectByteBuffers, update, update, view, writeTo, writeTo, writeTo, writeTo

Methods inherited from class java.lang.Object

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

Constructor Detail

MMapBuffer

public MMapBuffer(java.io.File f,
                  MMapMode mode)
           throws java.io.IOException

Open an memory mapped file.

Parameters:

f -

mode -

Throws:

java.io.IOException

MMapBuffer

public MMapBuffer(java.io.File f,
                  long offset,
                  long size,
                  MMapMode mode)
           throws java.io.IOException

Open an memory mapped file.

Parameters:

f -

offset -

size -

mode -

Throws:

java.io.IOException

Method Detail

address

public long address()

Overrides:

address in class xerial.larray.buffer.LBufferAPI

flush

public void flush()

Forces any changes made to this buffer to be written to the file

close

public void close()
           throws java.io.IOException

Close the memory mapped file. To ensure the written data is saved in the file, call flush before closing.

Throws:

java.io.IOException

offset

protected long offset()

Overrides:

offset in class xerial.larray.buffer.LBufferAPI