JsonNodeDeserializer (jackson-databind 2.15.2)

java.lang.Object
- com.fasterxml.jackson.databind.JsonDeserializer<T>
- - com.fasterxml.jackson.databind.deser.std.StdDeserializer<T>
  - - com.fasterxml.jackson.databind.deser.std.JsonNodeDeserializer

All Implemented Interfaces:

ContextualDeserializer, NullValueProvider, ValueInstantiator.Gettable, Serializable
```
public class JsonNodeDeserializer
extends StdDeserializer<T>
```
Deserializer that can build instances of JsonNode from any JSON content, using appropriate JsonNode type.
Rewritten in Jackson 2.13 to avoid recursion and allow handling of very deeply nested structures.

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 boolean _mergeArrays

protected boolean _mergeObjects

protected Boolean _supportsUpdates
- Fields inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer
  _valueClass, _valueType, F_MASK_ACCEPT_ARRAYS, F_MASK_INT_COERCIONS

Fields
Modifier and Type	Field and Description
`protected boolean`	`_mergeArrays`
`protected boolean`	`_mergeObjects`
`protected Boolean`	`_supportsUpdates`

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`JsonNodeDeserializer()`
`protected`	`JsonNodeDeserializer(JsonNodeDeserializer base, boolean mergeArrays, boolean mergeObjects)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected JsonDeserializer<?>`	`_createWithMerge(boolean mergeArrays, boolean mergeObjects)`
`protected JsonNode`	`_deserializeAnyScalar(JsonParser p, DeserializationContext ctxt)`
`protected ContainerNode<?>`	`_deserializeContainerNoRecursion(JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory, com.fasterxml.jackson.databind.deser.std.BaseNodeDeserializer.ContainerStack stack, ContainerNode<?> root)`
`protected ObjectNode`	`_deserializeObjectAtName(JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory, com.fasterxml.jackson.databind.deser.std.BaseNodeDeserializer.ContainerStack stack)` Alternate deserialization method used when parser already points to first FIELD_NAME and not START_OBJECT.
`protected JsonNode`	`_deserializeRareScalar(JsonParser p, DeserializationContext ctxt)`
`protected JsonNode`	`_fromBigDecimal(DeserializationContext ctxt, JsonNodeFactory nodeFactory, BigDecimal bigDec)`
`protected JsonNode`	`_fromEmbedded(JsonParser p, DeserializationContext ctxt)`
`protected JsonNode`	`_fromFloat(JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)`
`protected JsonNode`	`_fromInt(JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)`
`protected JsonNode`	`_fromInt(JsonParser p, int coercionFeatures, JsonNodeFactory nodeFactory)`
`protected void`	`_handleDuplicateField(JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory, String fieldName, ObjectNode objectNode, JsonNode oldValue, JsonNode newValue)` Method called when there is a duplicate value for a field.
`JsonDeserializer<?>`	`createContextual(DeserializationContext ctxt, BeanProperty property)` Method called to see if a different (or differently configured) deserializer is needed to deserialize values of specified property.
`JsonNode`	`deserialize(JsonParser p, DeserializationContext ctxt)` Implementation that will produce types of any JSON nodes; not just one deserializer is registered to handle (in case of more specialized handler).
`Object`	`deserializeWithType(JsonParser p, DeserializationContext ctxt, TypeDeserializer typeDeserializer)` Base implementation that does not assume specific type inclusion mechanism.
`Object`	`getAbsentValue(DeserializationContext ctxt)` Overridden variant to ensure that absent values are NOT coerced into `NullNode`s, unlike incoming `null` values.
`static JsonDeserializer<? extends JsonNode>`	`getDeserializer(Class<?> nodeClass)` Factory method for accessing deserializer for specific node type
`JsonNode`	`getNullValue(DeserializationContext ctxt)` Method that can be called to determine value to be used for representing null values (values deserialized when JSON token is `JsonToken.VALUE_NULL`).
`boolean`	`isCachable()` Method called to see if deserializer instance is cachable and usable for other properties of same type (type for which instance was created).
`LogicalType`	`logicalType()` Method for accessing logical type of values this deserializer produces.
`Boolean`	`supportsUpdate(DeserializationConfig config)` Introspection method that may be called to see whether deserializer supports update of an existing value (aka "merging") or not.
`protected JsonNode`	`updateObject(JsonParser p, DeserializationContext ctxt, ObjectNode node, com.fasterxml.jackson.databind.deser.std.BaseNodeDeserializer.ContainerStack stack)` Alternate deserialization method that is to update existing `ObjectNode` if possible.

Methods inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer
_byteOverflow, _checkBooleanToStringCoercion, _checkCoercionFail, _checkDoubleSpecialValue, _checkFloatSpecialValue, _checkFloatToIntCoercion, _checkFloatToStringCoercion, _checkFromStringCoercion, _checkFromStringCoercion, _checkIntToFloatCoercion, _checkIntToStringCoercion, _checkTextualNull, _checkToStringCoercion, _coerceBooleanFromInt, _coercedTypeDesc, _coercedTypeDesc, _coerceEmptyString, _coerceIntegral, _coerceNullToken, _coerceTextualNull, _deserializeFromArray, _deserializeFromEmpty, _deserializeFromEmptyString, _deserializeFromString, _deserializeWrappedValue, _failDoubleToIntCoercion, _findCoercionFromBlankString, _findCoercionFromEmptyArray, _findCoercionFromEmptyString, _findNullProvider, _hasTextualNull, _intOverflow, _isBlank, _isEmptyOrTextualNull, _isFalse, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _isTrue, _neitherNull, _nonNullNumber, _parseBoolean, _parseBooleanFromInt, _parseBooleanPrimitive, _parseBooleanPrimitive, _parseBytePrimitive, _parseDate, _parseDate, _parseDateFromArray, _parseDouble, _parseDouble, _parseDoublePrimitive, _parseDoublePrimitive, _parseDoublePrimitive, _parseFloatPrimitive, _parseFloatPrimitive, _parseFloatPrimitive, _parseInteger, _parseInteger, _parseIntPrimitive, _parseIntPrimitive, _parseLong, _parseLong, _parseLongPrimitive, _parseLongPrimitive, _parseShortPrimitive, _parseString, _parseString, _reportFailedNullCoerce, _shortOverflow, _verifyEndArrayForSingle, _verifyNullForPrimitive, _verifyNullForPrimitiveCoercion, _verifyNullForScalarCoercion, _verifyNumberForScalarCoercion, _verifyStringForScalarCoercion, findContentNullProvider, findContentNullStyle, findConvertingContentDeserializer, findDeserializer, findFormatFeature, findFormatOverrides, findValueNullProvider, getValueClass, getValueInstantiator, getValueType, getValueType, handledType, handleMissingEndArrayForSingle, handleNestedArrayForSingle, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer

Methods inherited from class com.fasterxml.jackson.databind.JsonDeserializer
deserialize, deserializeWithType, findBackReference, getDelegatee, getEmptyAccessPattern, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullAccessPattern, getNullValue, getObjectIdReader, replaceDelegatee, unwrappingDeserializer

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - _supportsUpdates
```
protected final Boolean _supportsUpdates
```
  - _mergeArrays
```
protected final boolean _mergeArrays
```
  - _mergeObjects
```
protected final boolean _mergeObjects
```
- Constructor Detail
  - JsonNodeDeserializer
```
protected JsonNodeDeserializer()
```
  - JsonNodeDeserializer
```
protected JsonNodeDeserializer(JsonNodeDeserializer base,
                               boolean mergeArrays,
                               boolean mergeObjects)
```
- Method Detail
  - _createWithMerge
```
protected JsonDeserializer<?> _createWithMerge(boolean mergeArrays,
                                               boolean mergeObjects)
```
  - getDeserializer
```
public static JsonDeserializer<? extends JsonNode> getDeserializer(Class<?> nodeClass)
```
    Factory method for accessing deserializer for specific node type
  - getNullValue
```
public JsonNode getNullValue(DeserializationContext ctxt)
```
    Description copied from class: JsonDeserializer
    
    Method that can be called to determine value to be used for representing null values (values deserialized when JSON token is JsonToken.VALUE_NULL). Usually this is simply Java null, but for some types (especially primitives) it may be necessary to use non-null values.
    This method may be called once, or multiple times, depending on what JsonDeserializer.getNullAccessPattern() returns.
    Default implementation simply returns null.
    
    Specified by:
    
    getNullValue in interface NullValueProvider
    
    Overrides:
    
    getNullValue in class JsonDeserializer<JsonNode>
  - getAbsentValue
```
public Object getAbsentValue(DeserializationContext ctxt)
```
    Overridden variant to ensure that absent values are NOT coerced into NullNodes, unlike incoming null values.
    
    Specified by:
    
    getAbsentValue in interface NullValueProvider
    
    Overrides:
    
    getAbsentValue in class JsonDeserializer<JsonNode>
  - deserialize
```
public JsonNode deserialize(JsonParser p,
                            DeserializationContext ctxt)
                     throws IOException
```
    Implementation that will produce types of any JSON nodes; not just one deserializer is registered to handle (in case of more specialized handler). Overridden by typed sub-classes for more thorough checking
    
    Specified by:
    
    deserialize in class JsonDeserializer<JsonNode>
    
    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
  - supportsUpdate
```
public Boolean supportsUpdate(DeserializationConfig config)
```
    Description copied from class: JsonDeserializer
    
    Introspection method that may be called to see whether deserializer supports update of an existing value (aka "merging") or not. Return value should either be Boolean.FALSE if update is not supported at all (immutable values); Boolean.TRUE if update should usually work (regular POJOs, for example), or null if this is either not known, or may sometimes work.
    Information gathered is typically used to either prevent merging update for property (either by skipping, if based on global defaults; or by exception during deserializer construction if explicit attempt made) if Boolean.FALSE returned, or inclusion if Boolean.TRUE is specified. If "unknown" case (null returned) behavior is to exclude property if global defaults used; or to allow if explicit per-type or property merging is defined.
    Default implementation returns null to allow explicit per-type or per-property attempts.
  - deserializeWithType
```
public Object deserializeWithType(JsonParser p,
                                  DeserializationContext ctxt,
                                  TypeDeserializer typeDeserializer)
                           throws IOException
```
    Description copied from class: StdDeserializer
    
    Base implementation that does not assume specific type inclusion mechanism. Sub-classes are expected to override this method if they are to handle type information.
    
    Overrides:
    
    deserializeWithType in class StdDeserializer<T extends JsonNode>
    
    typeDeserializer - Deserializer to use for handling type information
    
    Throws:
    
    IOException
  - logicalType
```
public LogicalType logicalType()
```
    Description copied from class: JsonDeserializer
    
    Method for accessing logical type of values this deserializer produces. Typically used for further configuring handling of values, for example, to find which coercions are legal.
    
    Overrides:
    
    logicalType in class JsonDeserializer<T extends JsonNode>
    
    Returns:
    
    Logical type of values this deserializer produces, if known; null if not
  - isCachable
```
public boolean isCachable()
```
    Description copied from class: JsonDeserializer
    
    Method called to see if deserializer instance is cachable and usable for other properties of same type (type for which instance was created).
    Note that cached instances are still resolved on per-property basis, if instance implements ResolvableDeserializer: cached instance is just as the base. This means that in most cases it is safe to cache instances; however, it only makes sense to cache instances if instantiation is expensive, or if instances are heavy-weight.
    Default implementation returns false, to indicate that no caching is done.
    
    Overrides:
    
    isCachable in class JsonDeserializer<T extends JsonNode>
  - createContextual
```
public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
                                            BeanProperty property)
                                     throws JsonMappingException
```
    Description copied from interface: ContextualDeserializer
    
    Method called to see if a different (or differently configured) deserializer is needed to deserialize values of specified property. Note that instance that this method is called on is typically shared one and as a result method should NOT modify this instance but rather construct and return a new instance. This instance should only be returned as-is, in case it is already suitable for use.
    
    Specified by:
    
    createContextual in interface ContextualDeserializer
    
    Parameters:
    
    ctxt - Deserialization context to access configuration, additional deserializers that may be needed by this deserializer
    
    property - Method, field or constructor parameter that represents the property (and is used to assign deserialized value). Should be available; but there may be cases where caller cannot provide it and null is passed instead (in which case impls usually pass 'this' deserializer as is)
    
    Returns:
    
    Deserializer to use for deserializing values of specified property; may be this instance or a new instance.
    
    Throws:
    
    JsonMappingException
  - _handleDuplicateField
```
protected void _handleDuplicateField(JsonParser p,
                                     DeserializationContext ctxt,
                                     JsonNodeFactory nodeFactory,
                                     String fieldName,
                                     ObjectNode objectNode,
                                     JsonNode oldValue,
                                     JsonNode newValue)
                              throws IOException
```
    Method called when there is a duplicate value for a field. By default we don't care, and the last value is used. Can be overridden to provide alternate handling, such as throwing an exception, or choosing different strategy for combining values or choosing which one to keep.
    
    Parameters:
    
    fieldName - Name of the field for which duplicate value was found
    
    objectNode - Object node that contains values
    
    oldValue - Value that existed for the object node before newValue was added
    
    newValue - Newly added value just added to the object node
    
    Throws:
    
    IOException
  - _deserializeObjectAtName
```
protected final ObjectNode _deserializeObjectAtName(JsonParser p,
                                                    DeserializationContext ctxt,
                                                    JsonNodeFactory nodeFactory,
                                                    com.fasterxml.jackson.databind.deser.std.BaseNodeDeserializer.ContainerStack stack)
                                             throws IOException
```
    Alternate deserialization method used when parser already points to first FIELD_NAME and not START_OBJECT.
    
    Throws:
    
    IOException
  - updateObject
```
protected final JsonNode updateObject(JsonParser p,
                                      DeserializationContext ctxt,
                                      ObjectNode node,
                                      com.fasterxml.jackson.databind.deser.std.BaseNodeDeserializer.ContainerStack stack)
                               throws IOException
```
    Alternate deserialization method that is to update existing ObjectNode if possible.
    
    Throws:
    
    IOException
    
    Since:
    
    2.9
  - _deserializeContainerNoRecursion
```
protected final ContainerNode<?> _deserializeContainerNoRecursion(JsonParser p,
                                                                  DeserializationContext ctxt,
                                                                  JsonNodeFactory nodeFactory,
                                                                  com.fasterxml.jackson.databind.deser.std.BaseNodeDeserializer.ContainerStack stack,
                                                                  ContainerNode<?> root)
                                                           throws IOException
```
    Throws:
    
    IOException
  - _deserializeAnyScalar
```
protected final JsonNode _deserializeAnyScalar(JsonParser p,
                                               DeserializationContext ctxt)
                                        throws IOException
```
    Throws:
    
    IOException
  - _deserializeRareScalar
```
protected final JsonNode _deserializeRareScalar(JsonParser p,
                                                DeserializationContext ctxt)
                                         throws IOException
```
    Throws:
    
    IOException
  - _fromInt
```
protected final JsonNode _fromInt(JsonParser p,
                                  int coercionFeatures,
                                  JsonNodeFactory nodeFactory)
                           throws IOException
```
    Throws:
    
    IOException
  - _fromInt
```
protected final JsonNode _fromInt(JsonParser p,
                                  DeserializationContext ctxt,
                                  JsonNodeFactory nodeFactory)
                           throws IOException
```
    Throws:
    
    IOException
  - _fromFloat
```
protected final JsonNode _fromFloat(JsonParser p,
                                    DeserializationContext ctxt,
                                    JsonNodeFactory nodeFactory)
                             throws IOException
```
    Throws:
    
    IOException
  - _fromBigDecimal
```
protected final JsonNode _fromBigDecimal(DeserializationContext ctxt,
                                         JsonNodeFactory nodeFactory,
                                         BigDecimal bigDec)
```
  - _fromEmbedded
```
protected final JsonNode _fromEmbedded(JsonParser p,
                                       DeserializationContext ctxt)
                                throws IOException
```
    Throws:
    
    IOException

Class JsonNodeDeserializer

Nested Class Summary

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

Field Summary

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

Constructor Summary

Method Summary

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

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

Methods inherited from class java.lang.Object

Field Detail

_supportsUpdates

_mergeArrays

_mergeObjects

Constructor Detail

JsonNodeDeserializer

JsonNodeDeserializer

Method Detail

_createWithMerge

getDeserializer

getNullValue

getAbsentValue

deserialize

supportsUpdate

deserializeWithType

logicalType

isCachable

createContextual

_handleDuplicateField

_deserializeObjectAtName

updateObject

_deserializeContainerNoRecursion

_deserializeAnyScalar

_deserializeRareScalar

_fromInt

_fromInt

_fromFloat

_fromBigDecimal

_fromEmbedded