Module java4ever.utils

Package tech.deplant.java4ever.utils

Class Objs

java.lang.Object

tech.deplant.java4ever.utils.Objs

public class Objs
extends Object

Constructor Summary

Constructors

Constructor	Description
Objs()

Method Summary

Modifier and Type	Method	Description
static <OUT, IN> OUT	decode(IN obj, IN compare, OUT then, OUT orElse)
static boolean	equals(Object a, Object b)
static boolean	isNotNull(Object obj)
static boolean	isNull(Object obj)
static <T> T	notNull(T obj)	Throws NullPointerException if object is null
static <T> T	notNull(T obj, String message)	Throws NullPointerException with provided message if object is null
static <X extends Throwable, T> T	notNull(T obj, Supplier<? extends X> exceptionSupplier)	Throws custom exception if object is null
static <T> void	notNullDo(T obj, Consumer<T> action)
static <T> T	notNullElse(T obj, T defaultObj)	Replaces importing of Objects.requireNonNullElse() Returns defaultObj if obj is null
static <T> T	notNullElseLazy(T obj, Supplier<? extends T> supplier)
static <T, R> R	notNullReplaceElse(T obj, R replaceObj, R defaultObj)	If not null returns replaceObj, if null returns defaultObj analogue of NVL2() function in Oracle SQL
static <T, R> R	notNullReplaceElseLazy(T obj, Supplier<? extends R> replaceSupplier, Supplier<? extends R> defaultSupplier)

Methods inherited from class java.lang.Object

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

Constructor Details

Objs

public Objs()

Method Details

decode

public static <OUT,
IN> OUT decode(IN obj,
 IN compare,
 OUT then,
 OUT orElse)

isNull

public static boolean isNull(Object obj)

isNotNull

public static boolean isNotNull(Object obj)

equals

public static boolean equals(Object a,
 Object b)

notNull

public static <T> T notNull(T obj)

Throws NullPointerException if object is null

Type Parameters:

T -

Parameters:

obj - Object that will be checked

Returns:

passed object

notNull

public static <T> T notNull(T obj,
 String message)

Throws NullPointerException with provided message if object is null

Type Parameters:

T -

Parameters:

obj - Object that will be checked

message - Message for exception

Returns:

passed object

notNull

public static <X extends Throwable,
T> T notNull(T obj,
 Supplier<? extends X> exceptionSupplier)
                                         throws X

Throws custom exception if object is null

Type Parameters:

T -

Parameters:

obj - Object that will be checked

exceptionSupplier - Exception provider that will be thrown if object is null

Returns:

passed object

Throws:

X extends Throwable

notNullDo

public static <T> void notNullDo(T obj,
 Consumer<T> action)

notNullElse

public static <T> T notNullElse(T obj,
 T defaultObj)

Replaces importing of Objects.requireNonNullElse() Returns defaultObj if obj is null

notNullElseLazy

public static <T> T notNullElseLazy(T obj,
 Supplier<? extends T> supplier)

notNullReplaceElse

public static <T,
R> R notNullReplaceElse(T obj,
 R replaceObj,
 R defaultObj)

If not null returns replaceObj, if null returns defaultObj analogue of NVL2() function in Oracle SQL

notNullReplaceElseLazy

public static <T,
R> R notNullReplaceElseLazy(T obj,
 Supplier<? extends R> replaceSupplier,
 Supplier<? extends R> defaultSupplier)