com.hivemq.client.util

Interface TypeSwitch<T>

Type Parameters:

T - the super type to switch over.

All Known Implementing Classes:

TypeSwitch.Default, TypeSwitch.Never

public interface TypeSwitch<T>

Util to enable switching over types.

Example:

 
 Mqtt5MessageException e;
 TypeSwitch.when(e)
         .is(Mqtt5ConnAckException.class, c -> System.out.println(c.getMqttMessage().getReasonCode()))
         .is(Mqtt5DisconnectException.class, d -> System.out.println(d.getMqttMessage().getServerReference()));
 
 

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	TypeSwitch.Default<T>
static class	TypeSwitch.Never

Method Summary

Modifier and Type	Method and Description
<I extends T> @NotNull TypeSwitch<T>	is(@NotNull Class<I> type, @NotNull Consumer<I> consumer) Checks if the object that is switched over is of a given type and if so executes a callback.
static <T> @NotNull TypeSwitch<T>	never() Returns a TypeSwitch object which does not match any type.
static <T> @NotNull TypeSwitch<T>	when(T t) Returns a TypeSwitch object for switching over an object of type T.

Method Detail

never

@NotNull
static <T> @NotNull TypeSwitch<T> never()

Returns a TypeSwitch object which does not match any type.

Type Parameters:

T - the super type to switch over.

Returns:

the TypeSwitch object.

when

@NotNull
static <T> @NotNull TypeSwitch<T> when(@Nullable
                                                T t)

Returns a TypeSwitch object for switching over an object of type T.

Type Parameters:

T - the super type to switch over.

Parameters:

t - the object of type T.

Returns:

the TypeSwitch object.

is

@NotNull
<I extends T> @NotNull TypeSwitch<T> is(@NotNull
                                                 @NotNull Class<I> type,
                                                 @NotNull
                                                 @NotNull Consumer<I> consumer)

Checks if the object that is switched over is of a given type and if so executes a callback.

If the type matches the returned TypeSwitch will not match any further type.

Type Parameters:

I - the type to check

Parameters:

type - the class of the type to check.

consumer - the callback to execute if the type matches.

Returns:

the TypeSwitch object.