com.orientechnologies.common.util

Class OByteBufferUtils

java.lang.Object

com.orientechnologies.common.util.OByteBufferUtils

public class OByteBufferUtils
extends Object

This class is utility class for split primitive types to separate byte buffers and vice versa. This class is used because we use many byte buffers for mmap and there is situation when we need to write value on border of two buffers.

Since:

5/25/12 6:37 AM

Author:

Artem Loginov ([email protected])

Field Summary

Fields

Modifier and Type	Field and Description
static int	SIZE_OF_INT
static int	SIZE_OF_LONG
static int	SIZE_OF_SHORT

Constructor Summary

Constructors

Constructor and Description
OByteBufferUtils()

Method Summary

Modifier and Type	Method and Description
static int	mergeIntFromBuffers(ByteBuffer buffer, ByteBuffer buffer1) Merge int value from two byte buffer.
static long	mergeLongFromBuffers(ByteBuffer buffer, ByteBuffer buffer1) Merge long value from two byte buffer.
static short	mergeShortFromBuffers(ByteBuffer buffer, ByteBuffer buffer1) Merge short value from two byte buffer.
static void	splitIntToBuffers(ByteBuffer buffer, ByteBuffer buffer1, int iValue) Split int value into two byte buffer.
static void	splitLongToBuffers(ByteBuffer buffer, ByteBuffer buffer1, long iValue) Split long value into two byte buffer.
static void	splitShortToBuffers(ByteBuffer buffer, ByteBuffer buffer1, short iValue) Split short value into two byte buffer.

Methods inherited from class java.lang.Object

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

Field Detail

SIZE_OF_SHORT

public static final int SIZE_OF_SHORT

See Also:

Constant Field Values

SIZE_OF_INT

public static final int SIZE_OF_INT

See Also:

Constant Field Values

SIZE_OF_LONG

public static final int SIZE_OF_LONG

See Also:

Constant Field Values

Constructor Detail

OByteBufferUtils

public OByteBufferUtils()

Method Detail

mergeShortFromBuffers

public static short mergeShortFromBuffers(ByteBuffer buffer,
                                          ByteBuffer buffer1)

Merge short value from two byte buffer. First byte of short will be extracted from first byte buffer and second from second one.

Parameters:

buffer - to read first part of value

buffer1 - to read second part of value

Returns:

merged value

mergeIntFromBuffers

public static int mergeIntFromBuffers(ByteBuffer buffer,
                                      ByteBuffer buffer1)

Merge int value from two byte buffer. First bytes of int will be extracted from first byte buffer and second from second one. How many bytes will be read from first buffer determines based on buffer.remaining() value

Parameters:

buffer - to read first part of value

buffer1 - to read second part of value

Returns:

merged value

mergeLongFromBuffers

public static long mergeLongFromBuffers(ByteBuffer buffer,
                                        ByteBuffer buffer1)

Merge long value from two byte buffer. First bytes of long will be extracted from first byte buffer and second from second one. How many bytes will be read from first buffer determines based on buffer.remaining() value

Parameters:

buffer - to read first part of value

buffer1 - to read second part of value

Returns:

merged value

splitShortToBuffers

public static void splitShortToBuffers(ByteBuffer buffer,
                                       ByteBuffer buffer1,
                                       short iValue)

Split short value into two byte buffer. First byte of short will be written to first byte buffer and second to second one.

Parameters:

buffer - to write first part of value

buffer1 - to write second part of value

splitIntToBuffers

public static void splitIntToBuffers(ByteBuffer buffer,
                                     ByteBuffer buffer1,
                                     int iValue)

Split int value into two byte buffer. First byte of int will be written to first byte buffer and second to second one. How many bytes will be written to first buffer determines based on buffer.remaining() value

Parameters:

buffer - to write first part of value

buffer1 - to write second part of value

splitLongToBuffers

public static void splitLongToBuffers(ByteBuffer buffer,
                                      ByteBuffer buffer1,
                                      long iValue)

Split long value into two byte buffer. First byte of long will be written to first byte buffer and second to second one. How many bytes will be written to first buffer determines based on buffer.remaining() value

Parameters:

buffer - to write first part of value

buffer1 - to write second part of value