com.fasterxml.jackson.databind.deser

Class BeanDeserializer

java.lang.Object

com.fasterxml.jackson.databind.JsonDeserializer<T>

com.fasterxml.jackson.databind.deser.std.StdDeserializer<Object>

com.fasterxml.jackson.databind.deser.BeanDeserializerBase

com.fasterxml.jackson.databind.deser.BeanDeserializer

All Implemented Interfaces:

ContextualDeserializer, NullValueProvider, ResolvableDeserializer, ValueInstantiator.Gettable, Serializable

Direct Known Subclasses:

ThrowableDeserializer

public class BeanDeserializer
extends BeanDeserializerBase
implements Serializable

Deserializer class that can deserialize instances of arbitrary bean objects, usually from JSON Object structs,

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.JsonDeserializer

JsonDeserializer.None

Field Summary

Fields

Modifier and Type	Field and Description
protected Exception	_nullFromCreator Lazily constructed exception used as root cause if reporting problem with creator method that returns null (which is not allowed)

Fields inherited from class com.fasterxml.jackson.databind.deser.BeanDeserializerBase

_anySetter, _arrayDelegateDeserializer, _backRefs, _beanProperties, _beanType, _delegateDeserializer, _externalTypeIdHandler, _ignorableProps, _ignoreAllUnknown, _injectables, _needViewProcesing, _nonStandardCreation, _objectIdReader, _propertyBasedCreator, _serializationShape, _subDeserializers, _unwrappedPropertyHandler, _valueInstantiator, _vanillaProcessing, TEMP_PROPERTY_NAME

Fields inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer

_valueClass, _valueType, F_MASK_ACCEPT_ARRAYS, F_MASK_INT_COERCIONS

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BeanDeserializer(BeanDeserializerBase src) Copy-constructor that can be used by sub-classes to allow copy-on-write style copying of settings of an existing instance.
	BeanDeserializer(BeanDeserializerBase src, BeanPropertyMap props)
protected	BeanDeserializer(BeanDeserializerBase src, boolean ignoreAllUnknown)
protected	BeanDeserializer(BeanDeserializerBase src, NameTransformer unwrapper)
	BeanDeserializer(BeanDeserializerBase src, ObjectIdReader oir)
	BeanDeserializer(BeanDeserializerBase src, Set<String> ignorableProps)
	BeanDeserializer(BeanDeserializerBuilder builder, BeanDescription beanDesc, BeanPropertyMap properties, Map<String,SettableBeanProperty> backRefs, HashSet<String> ignorableProps, boolean ignoreAllUnknown, boolean hasViews) Constructor used by BeanDeserializerBuilder.

Method Summary

Modifier and Type	Method and Description
protected Exception	_creatorReturnedNullException() Helper method for getting a lazily construct exception to be reported to DeserializationContext.handleInstantiationProblem(Class, Object, Throwable).
protected Object	_deserializeFromArray(JsonParser p, DeserializationContext ctxt) Helper method that allows easy support for array-related DeserializationFeatures `ACCEPT_EMPTY_ARRAY_AS_NULL_OBJECT` and `UNWRAP_SINGLE_VALUE_ARRAYS`: checks for either empty array, or single-value array-wrapped value (respectively), and either reports an exception (if no match, or feature(s) not enabled), or returns appropriate result value.
protected Object	_deserializeOther(JsonParser p, DeserializationContext ctxt, JsonToken t)
protected Object	_deserializeUsingPropertyBased(JsonParser p, DeserializationContext ctxt) Method called to deserialize bean using "property-based creator": this means that a non-default constructor or factory method is called, and then possibly other setters.
protected Object	_deserializeWithErrorWrapping(JsonParser p, DeserializationContext ctxt, SettableBeanProperty prop)
protected Object	_missingToken(JsonParser p, DeserializationContext ctxt) Deprecated.
protected BeanDeserializerBase	asArrayDeserializer() Fluent factory for creating a variant that can handle POJO output as a JSON Array.
Object	deserialize(JsonParser p, DeserializationContext ctxt) Main deserialization method for bean-based objects (POJOs).
Object	deserialize(JsonParser p, DeserializationContext ctxt, Object bean) Secondary deserialization method, called in cases where POJO instance is created as part of deserialization, potentially after collecting some or all of the properties to set.
protected Object	deserializeFromNull(JsonParser p, DeserializationContext ctxt) Helper method called for rare case of pointing to JsonToken.VALUE_NULL token.
Object	deserializeFromObject(JsonParser p, DeserializationContext ctxt) General version used when handling needs more advanced features.
protected Object	deserializeUsingPropertyBasedWithExternalTypeId(JsonParser p, DeserializationContext ctxt)
protected Object	deserializeUsingPropertyBasedWithUnwrapped(JsonParser p, DeserializationContext ctxt)
protected Object	deserializeWithExternalTypeId(JsonParser p, DeserializationContext ctxt)
protected Object	deserializeWithExternalTypeId(JsonParser p, DeserializationContext ctxt, Object bean)
protected Object	deserializeWithUnwrapped(JsonParser p, DeserializationContext ctxt) Method called when there are declared "unwrapped" properties which need special handling
protected Object	deserializeWithUnwrapped(JsonParser p, DeserializationContext ctxt, Object bean)
protected Object	deserializeWithView(JsonParser p, DeserializationContext ctxt, Object bean, Class<?> activeView)
JsonDeserializer<Object>	unwrappingDeserializer(NameTransformer transformer) Method that will return deserializer instance that is able to handle "unwrapped" value instances If no unwrapped instance can be constructed, will simply return this object as-is.
BeanDeserializerBase	withBeanProperties(BeanPropertyMap props) Mutant factory method that custom sub-classes must override; not left as abstract to prevent more drastic backwards compatibility problems.
BeanDeserializer	withIgnorableProperties(Set<String> ignorableProps)
BeanDeserializerBase	withIgnoreAllUnknown(boolean ignoreUnknown)
BeanDeserializer	withObjectIdReader(ObjectIdReader oir)

Methods inherited from class com.fasterxml.jackson.databind.deser.BeanDeserializerBase

_convertObjectId, _findPropertyUnwrapper, _findSubclassDeserializer, _handleTypedObjectId, _replaceProperty, _resolvedObjectIdProperty, _resolveInnerClassValuedProperty, _resolveManagedReferenceProperty, _resolveMergeAndNullSettings, createContextual, creatorProperties, deserializeFromArray, deserializeFromBoolean, deserializeFromDouble, deserializeFromEmbedded, deserializeFromNumber, deserializeFromObjectId, deserializeFromObjectUsingNonDefault, deserializeFromString, deserializeWithObjectId, deserializeWithType, findBackReference, findConvertingDeserializer, findProperty, findProperty, findProperty, getBeanClass, getEmptyAccessPattern, getEmptyValue, getKnownPropertyNames, getNullAccessPattern, getObjectIdReader, getPropertyCount, getValueInstantiator, getValueType, handledType, handleIgnoredProperty, handlePolymorphic, handleUnknownProperties, handleUnknownProperty, handleUnknownVanilla, hasProperty, hasViews, injectValues, isCachable, properties, replaceProperty, resolve, supportsUpdate, wrapAndThrow, wrapInstantiationProblem

Methods inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer

_byteOverflow, _coercedTypeDesc, _coerceEmptyString, _coerceIntegral, _coerceNullToken, _coerceTextualNull, _deserializeFromEmpty, _deserializeWrappedValue, _failDoubleToIntCoercion, _findNullProvider, _hasTextualNull, _intOverflow, _isEmptyOrTextualNull, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _neitherNull, _nonNullNumber, _parseBooleanFromInt, _parseBooleanPrimitive, _parseBytePrimitive, _parseDate, _parseDate, _parseDateFromArray, _parseDoublePrimitive, _parseDoublePrimitive, _parseFloatPrimitive, _parseFloatPrimitive, _parseIntPrimitive, _parseIntPrimitive, _parseLongPrimitive, _parseLongPrimitive, _parseShortPrimitive, _parseString, _reportFailedNullCoerce, _shortOverflow, _verifyEndArrayForSingle, _verifyNullForPrimitive, _verifyNullForPrimitiveCoercion, _verifyNullForScalarCoercion, _verifyNumberForScalarCoercion, _verifyStringForScalarCoercion, findContentNullProvider, findContentNullStyle, findConvertingContentDeserializer, findDeserializer, findFormatFeature, findFormatOverrides, findValueNullProvider, getValueClass, getValueType, handleMissingEndArrayForSingle, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble

Methods inherited from class com.fasterxml.jackson.databind.JsonDeserializer

deserializeWithType, getDelegatee, getEmptyValue, getNullValue, getNullValue, replaceDelegatee

Methods inherited from class java.lang.Object

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

Field Detail

_nullFromCreator

protected transient Exception _nullFromCreator

Lazily constructed exception used as root cause if reporting problem with creator method that returns null (which is not allowed)

Since:

2.8

Constructor Detail

BeanDeserializer

public BeanDeserializer(BeanDeserializerBuilder builder,
                        BeanDescription beanDesc,
                        BeanPropertyMap properties,
                        Map<String,SettableBeanProperty> backRefs,
                        HashSet<String> ignorableProps,
                        boolean ignoreAllUnknown,
                        boolean hasViews)

Constructor used by BeanDeserializerBuilder.

BeanDeserializer

protected BeanDeserializer(BeanDeserializerBase src)

Copy-constructor that can be used by sub-classes to allow copy-on-write style copying of settings of an existing instance.

BeanDeserializer

protected BeanDeserializer(BeanDeserializerBase src,
                           boolean ignoreAllUnknown)

BeanDeserializer

protected BeanDeserializer(BeanDeserializerBase src,
                           NameTransformer unwrapper)

BeanDeserializer

public BeanDeserializer(BeanDeserializerBase src,
                        ObjectIdReader oir)

BeanDeserializer

public BeanDeserializer(BeanDeserializerBase src,
                        Set<String> ignorableProps)

BeanDeserializer

public BeanDeserializer(BeanDeserializerBase src,
                        BeanPropertyMap props)

Method Detail

unwrappingDeserializer

public JsonDeserializer<Object> unwrappingDeserializer(NameTransformer transformer)

Description copied from class: JsonDeserializer

Method that will return deserializer instance that is able to handle "unwrapped" value instances If no unwrapped instance can be constructed, will simply return this object as-is.

Default implementation just returns 'this' indicating that no unwrapped variant exists

Specified by:

unwrappingDeserializer in class BeanDeserializerBase

withObjectIdReader

public BeanDeserializer withObjectIdReader(ObjectIdReader oir)

Specified by:

withObjectIdReader in class BeanDeserializerBase

withIgnorableProperties

public BeanDeserializer withIgnorableProperties(Set<String> ignorableProps)

Specified by:

withIgnorableProperties in class BeanDeserializerBase

withIgnoreAllUnknown

public BeanDeserializerBase withIgnoreAllUnknown(boolean ignoreUnknown)

Overrides:

withIgnoreAllUnknown in class BeanDeserializerBase

withBeanProperties

public BeanDeserializerBase withBeanProperties(BeanPropertyMap props)

Description copied from class: BeanDeserializerBase

Mutant factory method that custom sub-classes must override; not left as abstract to prevent more drastic backwards compatibility problems.

Overrides:

withBeanProperties in class BeanDeserializerBase

asArrayDeserializer

protected BeanDeserializerBase asArrayDeserializer()

Description copied from class: BeanDeserializerBase

Fluent factory for creating a variant that can handle POJO output as a JSON Array. Implementations may ignore this request if no such input is possible.

Specified by:

asArrayDeserializer in class BeanDeserializerBase

deserialize

public Object deserialize(JsonParser p,
                          DeserializationContext ctxt)
                   throws IOException

Main deserialization method for bean-based objects (POJOs).

Specified by:

deserialize in class JsonDeserializer<Object>

Parameters:

p - Parsed used for reading JSON content

ctxt - Context that can be used to access information about this deserialization activity.

Returns:

Deserialized value

Throws:

IOException

_deserializeOther

protected final Object _deserializeOther(JsonParser p,
                                         DeserializationContext ctxt,
                                         JsonToken t)
                                  throws IOException

Throws:

IOException

_missingToken

@Deprecated
protected Object _missingToken(JsonParser p,
                                           DeserializationContext ctxt)
                                    throws IOException

Deprecated.

Throws:

IOException

deserialize

public Object deserialize(JsonParser p,
                          DeserializationContext ctxt,
                          Object bean)
                   throws IOException

Secondary deserialization method, called in cases where POJO instance is created as part of deserialization, potentially after collecting some or all of the properties to set.

Overrides:

deserialize in class JsonDeserializer<Object>

Throws:

IOException

deserializeFromObject

public Object deserializeFromObject(JsonParser p,
                                    DeserializationContext ctxt)
                             throws IOException

General version used when handling needs more advanced features.

Specified by:

deserializeFromObject in class BeanDeserializerBase

Throws:

IOException

_deserializeUsingPropertyBased

protected Object _deserializeUsingPropertyBased(JsonParser p,
                                                DeserializationContext ctxt)
                                         throws IOException

Method called to deserialize bean using "property-based creator": this means that a non-default constructor or factory method is called, and then possibly other setters. The trick is that values for creator method need to be buffered, first; and due to non-guaranteed ordering possibly some other properties as well.

Specified by:

_deserializeUsingPropertyBased in class BeanDeserializerBase

Throws:

IOException

_deserializeWithErrorWrapping

protected final Object _deserializeWithErrorWrapping(JsonParser p,
                                                     DeserializationContext ctxt,
                                                     SettableBeanProperty prop)
                                              throws IOException

Throws:

IOException

deserializeFromNull

protected Object deserializeFromNull(JsonParser p,
                                     DeserializationContext ctxt)
                              throws IOException

Helper method called for rare case of pointing to JsonToken.VALUE_NULL token. While this is most often an erroneous condition, there is one specific case with XML handling where polymorphic type with no properties is exposed as such, and should be handled same as empty Object.

Throws:

IOException

Since:

2.7

_deserializeFromArray

protected Object _deserializeFromArray(JsonParser p,
                                       DeserializationContext ctxt)
                                throws IOException

Description copied from class: StdDeserializer

Helper method that allows easy support for array-related DeserializationFeatures `ACCEPT_EMPTY_ARRAY_AS_NULL_OBJECT` and `UNWRAP_SINGLE_VALUE_ARRAYS`: checks for either empty array, or single-value array-wrapped value (respectively), and either reports an exception (if no match, or feature(s) not enabled), or returns appropriate result value.

This method should NOT be called if Array representation is explicitly supported for type: it should only be called in case it is otherwise unrecognized.

NOTE: in case of unwrapped single element, will handle actual decoding by calling StdDeserializer._deserializeWrappedValue(com.fasterxml.jackson.core.JsonParser, com.fasterxml.jackson.databind.DeserializationContext), which by default calls JsonDeserializer.deserialize(JsonParser, DeserializationContext).

Overrides:

_deserializeFromArray in class StdDeserializer<Object>

Throws:

IOException

deserializeWithView

protected final Object deserializeWithView(JsonParser p,
                                           DeserializationContext ctxt,
                                           Object bean,
                                           Class<?> activeView)
                                    throws IOException

Throws:

IOException

deserializeWithUnwrapped

protected Object deserializeWithUnwrapped(JsonParser p,
                                          DeserializationContext ctxt)
                                   throws IOException

Method called when there are declared "unwrapped" properties which need special handling

Throws:

IOException

deserializeWithUnwrapped

protected Object deserializeWithUnwrapped(JsonParser p,
                                          DeserializationContext ctxt,
                                          Object bean)
                                   throws IOException

Throws:

IOException

deserializeUsingPropertyBasedWithUnwrapped

protected Object deserializeUsingPropertyBasedWithUnwrapped(JsonParser p,
                                                            DeserializationContext ctxt)
                                                     throws IOException

Throws:

IOException

deserializeWithExternalTypeId

protected Object deserializeWithExternalTypeId(JsonParser p,
                                               DeserializationContext ctxt)
                                        throws IOException

Throws:

IOException

deserializeWithExternalTypeId

protected Object deserializeWithExternalTypeId(JsonParser p,
                                               DeserializationContext ctxt,
                                               Object bean)
                                        throws IOException

Throws:

IOException

deserializeUsingPropertyBasedWithExternalTypeId

protected Object deserializeUsingPropertyBasedWithExternalTypeId(JsonParser p,
                                                                 DeserializationContext ctxt)
                                                          throws IOException

Throws:

IOException

_creatorReturnedNullException

protected Exception _creatorReturnedNullException()

Helper method for getting a lazily construct exception to be reported to DeserializationContext.handleInstantiationProblem(Class, Object, Throwable).

Since:

2.8