Package com.illumon.iris.binarystore

Class BinaryStoreUtils

java.lang.Object

com.illumon.iris.binarystore.BinaryStoreUtils

public class BinaryStoreUtils
extends Object

Container class for utility functions related to binary stores.

Constructor Summary

Constructors

Constructor	Description
BinaryStoreUtils()

Method Summary

Modifier and Type	Method	Description
static void	adlerUpdateInt(Adler32 adler32, int value)	Adler32 doesn't have a nice way to add an int.
static void	adlerUpdateIntAndByte(Adler32 adler32, int intValue, byte byteValue)	Adler32 doesn't have a nice way to add an int.
static ByteBuffer	appendAdler(ByteBuffer theBuffer)	Calculate the Adler32 checksum on the buffer, from beginning to current position, and append it.
static ByteBuffer	appendAdler(ByteBuffer theBuffer, int startingPosition)	Compute the Adler checksum of the buffer from the given position to the current position and add it to the buffer.
static int	computeAdler(ByteBuffer theBuffer)	Compute the Adler32 checksum of the given buffer.
static int	computeAdler(ByteBuffer originalBuffer, int startingPosition)	Compute the Adler32 checksum of the buffer from startingPosition to current position.
static byte[]	getTemporaryDataArray(byte[] currentArray, int requiredLength)	Get the current array or a newly-allocated array large enough to accommodate the required length.

Methods inherited from class java.lang.Object

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

Constructor Details

BinaryStoreUtils

public BinaryStoreUtils()

Method Details

computeAdler

public static int computeAdler(ByteBuffer theBuffer)

Compute the Adler32 checksum of the given buffer. The buffer should be in read mode, and this operation consumes the buffer.

Parameters:

theBuffer - Compute the checksum of this buffer from position to limit.

Returns:

The Adler32 checksum of the consumed buffer.

appendAdler

public static ByteBuffer appendAdler(ByteBuffer theBuffer)

Calculate the Adler32 checksum on the buffer, from beginning to current position, and append it. The buffer will have its position advanced by 32 bits and will remain in write mode.

Parameters:

theBuffer - Operate on this buffer.

Returns:

The buffer, for chaining.

computeAdler

public static int computeAdler(ByteBuffer originalBuffer, int startingPosition)

Compute the Adler32 checksum of the buffer from startingPosition to current position. The buffer should be in write mode and will not be changed.

Parameters:

originalBuffer - Compute the checksum on this buffer.

startingPosition - Calculate the checksum from this position to the buffer's current position.

Returns:

The Adler32 checksum of the buffer from startingPosition to current position.

appendAdler

public static ByteBuffer appendAdler(ByteBuffer theBuffer, int startingPosition)

Compute the Adler checksum of the buffer from the given position to the current position and add it to the buffer. The buffer will have its position advanced by 32 bits and will remain in write mode.

Parameters:

theBuffer - Operate on this buffer.

startingPosition - Starting position for the checksum calculation.

Returns:

The buffer, for chaining.

adlerUpdateInt

public static void adlerUpdateInt(Adler32 adler32, int value)

Adler32 doesn't have a nice way to add an int.

Parameters:

adler32 - the Adler32 instance to append an int to.

value - the int to add to the Adler32.

adlerUpdateIntAndByte

public static void adlerUpdateIntAndByte(Adler32 adler32, int intValue, byte byteValue)

Adler32 doesn't have a nice way to add an int.

Parameters:

adler32 - the Adler32 instance to append an int to.

intValue - the int to add to the Adler32.

byteValue - the byte to add to the Adler32.

getTemporaryDataArray

public static byte[] getTemporaryDataArray(byte[] currentArray, int requiredLength)

Get the current array or a newly-allocated array large enough to accommodate the required length.

Parameters:

currentArray - The current array, or null if there is none

requiredLength - The minimum length of the returned array

Returns:

An array large enough to accommodate the required length