io.mappedbus

Class MemoryMappedFile

java.lang.Object

io.mappedbus.MemoryMappedFile

public class MemoryMappedFile
extends java.lang.Object

Class for direct access to a memory mapped file.

Method Summary

Modifier and Type	Method and Description
byte	getByte(long pos) Reads a byte from the specified position.
void	getBytes(long pos, byte[] data, int offset, int length) Reads a buffer of data.
int	getInt(long pos) Reads an int from the specified position.
long	getLong(long pos) Reads a long from the specified position.
void	putByte(long pos, byte val) Writes a byte to the specified position.
void	putInt(long pos, int val) Writes an int to the specified position.
void	putLong(long pos, long val) Writes a long to the specified position.
void	setBytes(long pos, byte[] data, int offset, int length) Writes a buffer of data.

Methods inherited from class java.lang.Object

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

Method Detail

getByte

public byte getByte(long pos)

Reads a byte from the specified position.

Parameters:

pos - the position in the memory mapped file

Returns:

the value read

getInt

public int getInt(long pos)

Reads an int from the specified position.

Parameters:

pos - the position in the memory mapped file

Returns:

the value read

getLong

public long getLong(long pos)

Reads a long from the specified position.

Parameters:

pos - position in the memory mapped file

Returns:

the value read

putByte

public void putByte(long pos,
                    byte val)

Writes a byte to the specified position.

Parameters:

pos - the position in the memory mapped file

val - the value to write

putInt

public void putInt(long pos,
                   int val)

Writes an int to the specified position.

Parameters:

pos - the position in the memory mapped file

val - the value to write

putLong

public void putLong(long pos,
                    long val)

Writes a long to the specified position.

Parameters:

pos - the position in the memory mapped file

val - the value to write

getBytes

public void getBytes(long pos,
                     byte[] data,
                     int offset,
                     int length)

Reads a buffer of data.

Parameters:

pos - the position in the memory mapped file

data - the input buffer

offset - the offset in the buffer of the first byte to read data into

length - the length of the data

setBytes

public void setBytes(long pos,
                     byte[] data,
                     int offset,
                     int length)

Writes a buffer of data.

Parameters:

pos - the position in the memory mapped file

data - the output buffer

offset - the offset in the buffer of the first byte to write

length - the length of the data