Module tools.jackson.databind

Package tools.jackson.databind.jsontype.impl

Class AsDeductionTypeDeserializer

java.lang.Object

tools.jackson.databind.jsontype.TypeDeserializer

tools.jackson.databind.jsontype.impl.TypeDeserializerBase

tools.jackson.databind.jsontype.impl.AsArrayTypeDeserializer

tools.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer

tools.jackson.databind.jsontype.impl.AsDeductionTypeDeserializer

public class AsDeductionTypeDeserializer
extends AsPropertyTypeDeserializer

A TypeDeserializer capable of deducing polymorphic types based on the fields available. Deduction is limited to the names of child properties (not their values or, consequently, any nested descendants). Exceptions will be thrown if not enough unique information is present to select a single subtype.

The current deduction process does not support pojo-hierarchies such that the absence of child fields infers a parent type. That is, every deducible subtype MUST have some unique fields and the input data MUST contain said unique fields to provide a positive match.

Field Summary

Fields inherited from class tools.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer

_inclusion, _msgForMissingId, _strictTypeIdHandling

Fields inherited from class tools.jackson.databind.jsontype.impl.TypeDeserializerBase

_baseType, _defaultImpl, _defaultImplDeserializer, _deserializers, _idResolver, _property, _typeIdVisible, _typePropertyName

Constructor Summary

Constructors

Constructor	Description
AsDeductionTypeDeserializer(DeserializationContext ctxt, JavaType bt, TypeIdResolver idRes, JavaType defaultImpl, Collection<NamedType> subtypes)
AsDeductionTypeDeserializer(AsDeductionTypeDeserializer src, BeanProperty property)

Method Summary

Modifier and Type	Method	Description
protected Map<BitSet,String>	buildFingerprints(DeserializationContext ctxt, Collection<NamedType> subtypes)
Object	deserializeTypedFromObject(JsonParser p, DeserializationContext ctxt)	This is the trickiest thing to handle, since property we are looking for may be anywhere...
TypeDeserializer	forProperty(BeanProperty prop)	Method called to create contextual version, to be used for values of given property.

Methods inherited from class tools.jackson.databind.jsontype.impl.AsPropertyTypeDeserializer

_deserializeTypedForId, _deserializeTypedUsingDefaultImpl, deserializeTypedFromAny, getTypeInclusion

Methods inherited from class tools.jackson.databind.jsontype.impl.AsArrayTypeDeserializer

_deserialize, _locateTypeId, _usesExternalId, deserializeTypedFromArray, deserializeTypedFromScalar

Methods inherited from class tools.jackson.databind.jsontype.impl.TypeDeserializerBase

_deserializeWithNativeTypeId, _findDefaultImplDeserializer, _findDeserializer, _handleMissingTypeId, _handleUnknownTypeId, baseType, baseTypeName, getDefaultImpl, getPropertyName, getTypeIdResolver, hasDefaultImpl, toString

Methods inherited from class tools.jackson.databind.jsontype.TypeDeserializer

deserializeIfNatural, deserializeIfNatural

Methods inherited from class java.lang.Object

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

Constructor Details

AsDeductionTypeDeserializer

public AsDeductionTypeDeserializer(DeserializationContext ctxt,
 JavaType bt,
 TypeIdResolver idRes,
 JavaType defaultImpl,
 Collection<NamedType> subtypes)

AsDeductionTypeDeserializer

public AsDeductionTypeDeserializer(AsDeductionTypeDeserializer src,
 BeanProperty property)

Method Details

forProperty

public TypeDeserializer forProperty(BeanProperty prop)

Description copied from class: TypeDeserializer

Method called to create contextual version, to be used for values of given property. This may be the type itself (as is the case for bean properties), or values contained (for Collection or Map valued properties).

Overrides:

forProperty in class AsPropertyTypeDeserializer

buildFingerprints

protected Map<BitSet,String> buildFingerprints(DeserializationContext ctxt,
 Collection<NamedType> subtypes)

deserializeTypedFromObject

public Object deserializeTypedFromObject(JsonParser p,
 DeserializationContext ctxt)
                                  throws JacksonException

Description copied from class: AsPropertyTypeDeserializer

This is the trickiest thing to handle, since property we are looking for may be anywhere...

Overrides:

deserializeTypedFromObject in class AsPropertyTypeDeserializer

Throws:

JacksonException