Package com.swiftmq.impl.mqtt.v311.netty.util.internal

Class ObjectUtil

java.lang.Object

com.swiftmq.impl.mqtt.v311.netty.util.internal.ObjectUtil

public final class ObjectUtil
extends Object

A grab-bag of useful utility methods.

Method Summary

Modifier and Type	Method	Description
static <T> T[]	checkNonEmpty(T[] array, String name)	Checks that the given argument is neither null nor empty.
static <T extends Collection<?>> T	checkNonEmpty(T collection, String name)	Checks that the given argument is neither null nor empty.
static <T> T	checkNotNull(T arg, String text)	Checks that the given argument is not null.
static int	checkPositive(int i, String name)	Checks that the given argument is strictly positive.
static long	checkPositive(long i, String name)	Checks that the given argument is strictly positive.
static int	checkPositiveOrZero(int i, String name)	Checks that the given argument is positive or zero.
static long	checkPositiveOrZero(long i, String name)	Checks that the given argument is positive or zero.
static int	intValue(Integer wrapper, int defaultValue)	Resolves a possibly null Integer to a primitive int, using a default value.
static long	longValue(Long wrapper, long defaultValue)	Resolves a possibly null Long to a primitive long, using a default value.

Methods inherited from class java.lang.Object

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

Method Details

checkNotNull

public static <T> T checkNotNull(T arg,
 String text)

Checks that the given argument is not null. If it is, throws NullPointerException. Otherwise, returns the argument.

checkPositive

public static int checkPositive(int i,
 String name)

Checks that the given argument is strictly positive. If it is not, throws IllegalArgumentException. Otherwise, returns the argument.

checkPositive

public static long checkPositive(long i,
 String name)

Checks that the given argument is strictly positive. If it is not, throws IllegalArgumentException. Otherwise, returns the argument.

checkPositiveOrZero

public static int checkPositiveOrZero(int i,
 String name)

Checks that the given argument is positive or zero. If it is not , throws IllegalArgumentException. Otherwise, returns the argument.

checkPositiveOrZero

public static long checkPositiveOrZero(long i,
 String name)

Checks that the given argument is positive or zero. If it is not, throws IllegalArgumentException. Otherwise, returns the argument.

checkNonEmpty

public static <T> T[] checkNonEmpty(T[] array,
 String name)

Checks that the given argument is neither null nor empty. If it is, throws NullPointerException or IllegalArgumentException. Otherwise, returns the argument.

checkNonEmpty

public static <T extends Collection<?>> T checkNonEmpty(T collection,
 String name)

Checks that the given argument is neither null nor empty. If it is, throws NullPointerException or IllegalArgumentException. Otherwise, returns the argument.

intValue

public static int intValue(Integer wrapper,
 int defaultValue)

Resolves a possibly null Integer to a primitive int, using a default value.

Parameters:

wrapper - the wrapper

defaultValue - the default value

Returns:

the primitive value

longValue

public static long longValue(Long wrapper,
 long defaultValue)

Resolves a possibly null Long to a primitive long, using a default value.

Parameters:

wrapper - the wrapper

defaultValue - the default value

Returns:

the primitive value