Package com.fasterxml.jackson.databind.deser

Interface NullValueProvider

All Known Implementing Classes:
AbstractDeserializer, ArrayBlockingQueueDeserializer, AtomicBooleanDeserializer, AtomicIntegerDeserializer, AtomicLongDeserializer, AtomicReferenceDeserializer, BaseScalarOptionalDeserializer, BeanAsArrayBuilderDeserializer, BeanAsArrayDeserializer, BeanDeserializer, BeanDeserializerBase, BuilderBasedDeserializer, ByteBufferDeserializer, CollectionDeserializer, ContainerDeserializerBase, CoreXMLDeserializers.Std, DataHandlerDeserializer, DateDeserializers.CalendarDeserializer, DateDeserializers.DateBasedDeserializer, DateDeserializers.DateDeserializer, DateDeserializers.SqlDateDeserializer, DateDeserializers.TimestampDeserializer, DelegatingDeserializer, DOMDeserializer, DOMDeserializer.DocumentDeserializer, DOMDeserializer.NodeDeserializer, DurationDeserializer, EnumDeserializer, EnumMapDeserializer, EnumSetDeserializer, ErrorThrowingDeserializer, FailingDeserializer, FromStringDeserializer, FromStringDeserializer.Std, InstantDeserializer, JsonDeserializer, JsonDeserializer.None, JsonNodeDeserializer, JSR310DateTimeDeserializerBase, JSR310StringParsableDeserializer, LocalDateDeserializer, LocalDateTimeDeserializer, LocalTimeDeserializer, MapDeserializer, MapEntryDeserializer, MonthDayDeserializer, NioPathDeserializer, NullifyingDeserializer, NullsAsEmptyProvider, NullsConstantProvider, NullsFailProvider, NumberDeserializers.BigDecimalDeserializer, NumberDeserializers.BigIntegerDeserializer, NumberDeserializers.BooleanDeserializer, NumberDeserializers.ByteDeserializer, NumberDeserializers.CharacterDeserializer, NumberDeserializers.DoubleDeserializer, NumberDeserializers.FloatDeserializer, NumberDeserializers.IntegerDeserializer, NumberDeserializers.LongDeserializer, NumberDeserializers.NumberDeserializer, NumberDeserializers.PrimitiveOrWrapperDeserializer, NumberDeserializers.ShortDeserializer, ObjectArrayDeserializer, OffsetTimeDeserializer, OneBasedMonthDeserializer, OptionalIntDeserializer, OptionalLongDeserializer, PrimitiveArrayDeserializers, ReferenceTypeDeserializer, StackTraceElementDeserializer, StdDelegatingDeserializer, StdDeserializer, StdNodeBasedDeserializer, StdScalarDeserializer, StringArrayDeserializer, StringCollectionDeserializer, StringDeserializer, ThrowableDeserializer, TokenBufferDeserializer, TypeWrappedDeserializer, UnsupportedTypeDeserializer, UntypedObjectDeserializer, UntypedObjectDeserializer.Vanilla, UUIDDeserializer, YearDeserializer, YearMonthDeserializer
public interface NullValueProvider
Helper interface implemented by classes that are to be used as null providers during deserialization. Most importantly implemented by JsonDeserializer (as a mix-in interface), but also by converters used to support more configurable null replacement.
Since:
2.9

  • Method Summary

    Modifier and Type
    Method
    Description
    default Object
    getAbsentValue(DeserializationContext ctxt)
    Method called to determine placeholder value to be used for cases where no value was obtained from input but we must pass a value nonetheless: the common case is that of Creator methods requiring passing a value for every parameter.
    AccessPattern
    getNullAccessPattern()
    Accessor that may be used to determine if and when provider must be called to access null replacement value.
    Object
    getNullValue(DeserializationContext ctxt)
    Method called to possibly convert incoming `null` token (read via underlying streaming input source) into other value of type accessor supports.