Package com.google.common.jimfs

Class Util

java.lang.Object

com.google.common.jimfs.Util

final class Util
extends java.lang.Object

Miscellaneous static utility methods.

Field Summary

Fields

Modifier and Type	Field	Description
private static int	ARRAY_LEN
private static int	C1
private static int	C2
private static byte[][]	NULL_ARRAY
private static byte[]	ZERO_ARRAY

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Util()

Method Summary

Modifier and Type	Method	Description
(package private) static void	checkNoneNull(java.lang.Iterable<?> objects)	Checks that no element in the given iterable is null, throwing NPE if any is.
(package private) static void	checkNotNegative(long n, java.lang.String description)	Checks that the given number is not negative, throwing IAE if it is.
(package private) static void	clear(byte[][] blocks, int off, int len)	Clears (sets to null) all blocks between off (inclusive) and off + len (exclusive) in the given array.
static int	nextPowerOf2(int n)	Returns the next power of 2 >= n.
(package private) static int	smearHash(int hashCode)
(package private) static void	zero(byte[] bytes, int off, int len)	Zeroes all bytes between off (inclusive) and off + len (exclusive) in the given array.

Methods inherited from class java.lang.Object

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

Field Detail

C1

private static final int C1

See Also:

Constant Field Values

C2

private static final int C2

See Also:

Constant Field Values

ARRAY_LEN

private static final int ARRAY_LEN

See Also:

Constant Field Values

ZERO_ARRAY

private static final byte[] ZERO_ARRAY

NULL_ARRAY

private static final byte[][] NULL_ARRAY

Constructor Detail

Util

private Util()

Method Detail

nextPowerOf2

public static int nextPowerOf2(int n)

Returns the next power of 2 >= n.

checkNotNegative

static void checkNotNegative(long n,
                             java.lang.String description)

Checks that the given number is not negative, throwing IAE if it is. The given description describes the number in the exception message.

checkNoneNull

static void checkNoneNull(java.lang.Iterable<?> objects)

Checks that no element in the given iterable is null, throwing NPE if any is.

smearHash

static int smearHash(int hashCode)

zero

static void zero(byte[] bytes,
                 int off,
                 int len)

Zeroes all bytes between off (inclusive) and off + len (exclusive) in the given array.

clear

static void clear(byte[][] blocks,
                  int off,
                  int len)

Clears (sets to null) all blocks between off (inclusive) and off + len (exclusive) in the given array.