org.opendaylight.vtn.manager.util

Class NumberUtils

java.lang.Object

org.opendaylight.vtn.manager.util.NumberUtils

public final class NumberUtils
extends Object

NumberUtils class is a collection of utility class fields and methods for number handling.

Since:

Lithium

Field Summary

Fields

Modifier and Type	Field and Description
static int	HASH_PRIME A prime number used to calculate hash code.
static int	MASK_BYTE A mask value which represents all bits in a byte value.
static long	MASK_INTEGER A mask value which represents all bits in an integer value.
static int	MASK_SHORT A mask value which represents all bits in a short value.
static int	NUM_OCTETS_BYTE The number of octets in a byte value.
static int	NUM_OCTETS_INTEGER The number of octets in an integer value.
static int	NUM_OCTETS_SHORT The number of octets in a short integer value.

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	equalsDouble(double d1, double d2) Determine whether the given double numbers are identical.
static int	getUnsigned(byte b) Return the unsigned value of the given byte value.
static long	getUnsigned(int i) Return the unsigned value of the given integer value.
static BigInteger	getUnsigned(long l) Return the unsigned value of the given long integer value.
static int	getUnsigned(short s) Return the unsigned value of the given short value.
static int	hashCode(double value) Return a hash code of the given double value.
static int	hashCode(long value) Return a hash code of the given long integer value.
static void	setInt(byte[] array, int off, int value) Set an integer value into the given byte array in network byte order.
static void	setShort(byte[] array, int off, short value) Set a short integer value into the given byte array in network byte order.
static Byte	toByte(Number num) Convert the given number into a Byte instance.
static byte[]	toBytes(int v) Convert an integer value into an byte array.
static byte[]	toBytes(short v) Convert a short integer value into an byte array.
static int	toInteger(byte[] b) Convert a 4 bytes array into an integer number.
static Integer	toInteger(Number num) Convert the given number into a Integer instance.
static Long	toLong(Number num) Convert the given number into a Long instance.
static short	toShort(byte[] b) Convert a 2 bytes array into a short integer number.
static Short	toShort(Number num) Convert the given number into a Short instance.

Methods inherited from class java.lang.Object

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

Field Detail

HASH_PRIME

public static final int HASH_PRIME

A prime number used to calculate hash code.

See Also:

Constant Field Values

NUM_OCTETS_INTEGER

public static final int NUM_OCTETS_INTEGER

The number of octets in an integer value.

See Also:

Constant Field Values

NUM_OCTETS_SHORT

public static final int NUM_OCTETS_SHORT

The number of octets in a short integer value.

Since:

Beryllium

See Also:

Constant Field Values

NUM_OCTETS_BYTE

public static final int NUM_OCTETS_BYTE

The number of octets in a byte value.

Since:

Beryllium

See Also:

Constant Field Values

MASK_BYTE

public static final int MASK_BYTE

A mask value which represents all bits in a byte value.

See Also:

Constant Field Values

MASK_SHORT

public static final int MASK_SHORT

A mask value which represents all bits in a short value.

See Also:

Constant Field Values

MASK_INTEGER

public static final long MASK_INTEGER

A mask value which represents all bits in an integer value.

See Also:

Constant Field Values

Method Detail

hashCode

public static int hashCode(long value)

Return a hash code of the given long integer value.

Parameters:

value - A long integer value.

Returns:

A hash code of the given value.

hashCode

public static int hashCode(double value)

Return a hash code of the given double value.

Parameters:

value - A double value.

Returns:

A hash code of the given value.

setInt

public static void setInt(byte[] array,
          int off,
          int value)

Set an integer value into the given byte array in network byte order.

Parameters:

array - A byte array.

off - Index of array to store value.

value - An integer value.

setShort

public static void setShort(byte[] array,
            int off,
            short value)

Set a short integer value into the given byte array in network byte order.

Parameters:

array - A byte array.

off - Index of array to store value.

value - A short integer value.

toInteger

public static int toInteger(byte[] b)

Convert a 4 bytes array into an integer number.

Parameters:

b - A 4 bytes array.

Returns:

An integer number.

Throws:

NullPointerException - b is null.

IllegalArgumentException - The length of b is not 4.

toShort

public static short toShort(byte[] b)

Convert a 2 bytes array into a short integer number.

Parameters:

b - A 2 bytes array.

Returns:

A short integer number.

Throws:

NullPointerException - b is null.

IllegalArgumentException - The length of b is not 2.

Since:

Beryllium

toBytes

public static byte[] toBytes(int v)

Convert an integer value into an byte array.

Parameters:

v - An integer value.

Returns:

A converted byte array.

toBytes

public static byte[] toBytes(short v)

Convert a short integer value into an byte array.

Parameters:

v - A short integer value.

Returns:

A converted byte array.

Since:

Beryllium

getUnsigned

public static int getUnsigned(byte b)

Return the unsigned value of the given byte value.

Parameters:

b - A byte value.

Returns:

An integer value which represents the unsigned byte value.

getUnsigned

public static int getUnsigned(short s)

Return the unsigned value of the given short value.

Parameters:

s - A short value.

Returns:

An integer value which represents the unsigned short value.

getUnsigned

public static long getUnsigned(int i)

Return the unsigned value of the given integer value.

Parameters:

i - An integer value.

Returns:

A long integer value which represents the unsigned integer value.

getUnsigned

public static BigInteger getUnsigned(long l)

Return the unsigned value of the given long integer value.

Parameters:

l - A long integer value.

Returns:

A BigInteger instance which represents the unsigned long integer value.

toByte

public static Byte toByte(Number num)

Convert the given number into a Byte instance.

Parameters:

num - A Number instance.

Returns:

A Byte instance equivalent to the given number. null if num is null.

toShort

public static Short toShort(Number num)

Convert the given number into a Short instance.

Parameters:

num - A Number instance.

Returns:

A Short instance equivalent to the given number. null if num is null.

toInteger

public static Integer toInteger(Number num)

Convert the given number into a Integer instance.

Parameters:

num - A Number instance.

Returns:

An Integer instance equivalent to the given number. null if num is null.

toLong

public static Long toLong(Number num)

Convert the given number into a Long instance.

Parameters:

num - A Number instance.

Returns:

A Long instance equivalent to the given number. null if num is null.

equalsDouble

public static boolean equalsDouble(double d1,
                   double d2)

Determine whether the given double numbers are identical.

Parameters:

d1 - The first double number to be compared.

d2 - The second double number to be compared.

Returns:

true only if the given two double numbers are identical.

See Also:

Double.equals(Object)