io.micronaut.serde.util

Interface NullableDeserializer<T>

Type Parameters:

T - The type to deserialize

All Superinterfaces:

Deserializer<T>

All Known Subinterfaces:

NullableSerde<T>, NumberSerde<N>, TemporalSerde<T>

All Known Implementing Classes:

AbstractBsonSerde, BsonRepresentationSerde, CodecBsonDecoder, DefaultFormattedTemporalSerde, HealthStatusSerde, InstantSerde, LocalDateSerde, LocalDateTimeSerde, LocalTimeSerde, OffsetDateTimeSerde, YearSerde, ZonedDateTimeSerde

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 and Description
default boolean	allowNull()
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 T.
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 Detail

deserialize

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

Description copied from interface: Deserializer

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

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:

java.io.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 java.io.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:

java.io.IOException - if something goes wrong during deserialization

allowNull

default boolean allowNull()

Specified by:

allowNull in interface Deserializer<T>

Returns:

Whether the deserializer is allowed to emit null