Package io.micronaut.serde.util

Interface NullableDeserializer<T>

Type Parameters:

T - The type to deserialize

All Superinterfaces:

Deserializer<T>

All Known Subinterfaces:

NullableSerde<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface NullableDeserializer<T>
extends Deserializer<T>

Sub-interface of Deserializer for deserializers that allow null. Deals with the decoding of null and delegates to deserializeNonNull(io.micronaut.serde.Decoder, io.micronaut.serde.Deserializer.DecoderContext, io.micronaut.core.type.Argument).

Nested Class Summary

Nested classes/interfaces inherited from interface io.micronaut.serde.Deserializer

Deserializer.DecoderContext

Method Summary

Modifier and Type	Method	Description
default boolean	allowNull()	Return true if the decoder can accept the null value by converting it to something else or just returning null.
default T	deserialize(Decoder decoder, Deserializer.DecoderContext context, io.micronaut.core.type.Argument<? super T> type)	Deserializes from the current state of the Decoder an object of type Deserializer.
T	deserializeNonNull(Decoder decoder, Deserializer.DecoderContext decoderContext, io.micronaut.core.type.Argument<? super T> type)	A method that is invoked when the value is known not to be null.

Methods inherited from interface io.micronaut.serde.Deserializer

createSpecific, getDefaultValue

Method Details

deserialize

default T deserialize(Decoder decoder,
 Deserializer.DecoderContext context,
 io.micronaut.core.type.Argument<? super T> type)
               throws IOException

Description copied from interface: Deserializer

Deserializes from the current state of the Decoder an object of type Deserializer.

Specified by:

deserialize in interface Deserializer<T>

Parameters:

decoder - The decoder, never null

context - The decoder context, never null

type - The generic type to be deserialized

Returns:

The deserialized object or null only if Deserializer.allowNull() returns true

Throws:

IOException - If an error occurs during deserialization of the object

deserializeNonNull

@NonNull
T deserializeNonNull(Decoder decoder,
 Deserializer.DecoderContext decoderContext,
 io.micronaut.core.type.Argument<? super T> type)
              throws IOException

A method that is invoked when the value is known not to be null.

Parameters:

decoder - The decoder

decoderContext - The decoder context

type - The type

Returns:

The value

Throws:

IOException - if something goes wrong during deserialization

allowNull

default boolean allowNull()

Description copied from interface: Deserializer

Return true if the decoder can accept the null value by converting it to something else or just returning null.

Specified by:

allowNull in interface Deserializer<T>

Returns:

Whether the deserializer is allowed to emit null