Package com.github.ushiosan23.jvm.base

Class Obj

java.lang.Object

com.github.ushiosan23.jvm.base.Obj

public final class Obj
extends Object

Method Summary

Modifier and Type	Method	Description
static <T> T	apply(T obj, IApply.WithResult<T,T> action)	Apply configuration to the object and return it as a result
static <T> T	notNull(T obj, T defValue)	Get not null value
static <T> T	tryCast(@NotNull Object obj, @NotNull Class<T> tClass)	It tries to recast the object towards the assigned destination, but does not generate an error.
static <T> void	tryCast(@NotNull Object obj, @NotNull Class<T> tClass, IApply.EmptyResult<T> action)	It tries to recast the object towards the assigned destination, but does not generate an error.

Methods inherited from class java.lang.Object

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

Method Detail

notNull

public static <T> T notNull(@Nullable
                            T obj,
                            T defValue)

Get not null value

Type Parameters:

T - Generic object type

Parameters:

obj - Object to check if it's null

defValue - Default value if obj is null

Returns:

Return obj if it's not null or defValue otherwise

apply

public static <T> T apply(T obj,
                          @NotNull
                          IApply.WithResult<T,T> action)

Apply configuration to the object and return it as a result

Type Parameters:

T - Generic object type

Parameters:

obj - Object to which the action applies

action - Apply action to execute

Returns:

Returns the same object is returned but with the changes made

tryCast

public static <T> void tryCast(@NotNull
                               @NotNull Object obj,
                               @NotNull
                               @NotNull Class<T> tClass,
                               @NotNull
                               IApply.EmptyResult<T> action)

It tries to recast the object towards the assigned destination, but does not generate an error. Instead, the action passed as the third parameter is executed, as long as the condition is true.

Example:

     Object unknownType = "Hello, World!";

     Obj.tryCast(
        unknownType, // Object to be evaluated
        String.class, // Destination class
        object -> System.out.println(object) // Action that is only executed if the recast is valid
     );
 

Type Parameters:

T - Generic destination type

Parameters:

obj - Object to analyze

tClass - Destination class

action - action that is executed when the recast is valid.

tryCast

@Nullable
public static <T> T tryCast(@NotNull
                            @NotNull Object obj,
                            @NotNull
                            @NotNull Class<T> tClass)

It tries to recast the object towards the assigned destination, but does not generate an error.

Type Parameters:

T - Generic destination type

Parameters:

obj - Object to analyze

tClass - Destination class

Returns:

Returns a recast object or null if the cast fails