Class JsonNodeDeserializer
- java.lang.Object
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- com.fasterxml.jackson.databind.JsonDeserializer<T>
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- com.fasterxml.jackson.databind.deser.std.StdDeserializer<T>
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- com.fasterxml.jackson.databind.deser.std.JsonNodeDeserializer
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- All Implemented Interfaces:
NullValueProvider
,ValueInstantiator.Gettable
,java.io.Serializable
public class JsonNodeDeserializer extends StdDeserializer<T>
Deserializer that can build instances ofJsonNode
from any JSON content, using appropriateJsonNode
type.- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.JsonDeserializer
JsonDeserializer.None
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Field Summary
Fields Modifier and Type Field Description protected java.lang.Boolean
_supportsUpdates
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Fields inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer
_valueClass, _valueType, F_MASK_ACCEPT_ARRAYS, F_MASK_INT_COERCIONS
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Constructor Summary
Constructors Modifier Constructor Description protected
JsonNodeDeserializer()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description protected JsonNode
_fromEmbedded(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected JsonNode
_fromFloat(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected JsonNode
_fromInt(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected void
_handleDuplicateField(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory, java.lang.String fieldName, ObjectNode objectNode, JsonNode oldValue, JsonNode newValue)
Method called when there is a duplicate value for a field.JsonNode
deserialize(com.fasterxml.jackson.core.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).protected JsonNode
deserializeAny(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected ArrayNode
deserializeArray(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected ObjectNode
deserializeObject(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
Method called to deserialize Object node instance when there is no existing node to modify.protected ObjectNode
deserializeObjectAtName(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
Alternate deserialization method used when parser already points to first FIELD_NAME and not START_OBJECT.java.lang.Object
deserializeWithType(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, TypeDeserializer typeDeserializer)
Base implementation that does not assume specific type inclusion mechanism.static JsonDeserializer<? extends JsonNode>
getDeserializer(java.lang.Class<?> nodeClass)
Factory method for accessing deserializer for specific node typeJsonNode
getNullValue(DeserializationContext ctxt)
Method that can be called to determine value to be used for representing null values (values deserialized when JSON token isJsonToken.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.java.lang.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
updateArray(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, ArrayNode node)
Alternate deserialization method that is to update existingObjectNode
if possible.protected JsonNode
updateObject(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, ObjectNode node)
Alternate deserialization method that is to update existingObjectNode
if possible.-
Methods inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer
_byteOverflow, _checkCoercionFail, _checkDoubleSpecialValue, _checkFloatSpecialValue, _checkFloatToIntCoercion, _checkFromStringCoercion, _checkFromStringCoercion, _checkTextualNull, _coerceBooleanFromInt, _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, _parseDoublePrimitive, _parseDoublePrimitive, _parseFloatPrimitive, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseLongPrimitive, _parseShortPrimitive, _parseString, _reportFailedNullCoerce, _shortOverflow, _verifyEndArrayForSingle, _verifyNullForPrimitive, _verifyNullForPrimitiveCoercion, _verifyNullForScalarCoercion, _verifyNumberForScalarCoercion, _verifyStringForScalarCoercion, findContentNullProvider, findContentNullStyle, findConvertingContentDeserializer, findDeserializer, findFormatFeature, findFormatOverrides, findValueNullProvider, getValueClass, getValueInstantiator, getValueType, getValueType, handledType, handleMissingEndArrayForSingle, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer
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Methods inherited from class com.fasterxml.jackson.databind.JsonDeserializer
deserialize, deserializeWithType, findBackReference, getDelegatee, getEmptyAccessPattern, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullAccessPattern, getNullValue, getObjectIdReader, replaceDelegatee, unwrappingDeserializer
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Method Detail
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getDeserializer
public static JsonDeserializer<? extends JsonNode> getDeserializer(java.lang.Class<?> nodeClass)
Factory method for accessing deserializer for specific node type
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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 isJsonToken.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 interfaceNullValueProvider
- Overrides:
getNullValue
in classJsonDeserializer<JsonNode>
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deserialize
public JsonNode deserialize(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt) throws java.io.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 classJsonDeserializer<JsonNode>
- Parameters:
p
- Parsed used for reading JSON contentctxt
- Context that can be used to access information about this deserialization activity.- Returns:
- Deserialized value
- Throws:
java.io.IOException
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deserializeWithType
public java.lang.Object deserializeWithType(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, TypeDeserializer typeDeserializer) throws java.io.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 classStdDeserializer<T extends JsonNode>
typeDeserializer
- Deserializer to use for handling type information- Throws:
java.io.IOException
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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 classJsonDeserializer<T extends JsonNode>
- Returns:
- Logical type of values this deserializer produces, if known;
null
if not
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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 classJsonDeserializer<T extends JsonNode>
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supportsUpdate
public java.lang.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 beBoolean.FALSE
if update is not supported at all (immutable values);Boolean.TRUE
if update should usually work (regular POJOs, for example), ornull
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 deserialization construction if explicit attempt made) if
Boolean.FALSE
returned, or inclusion ifBoolean.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.- Overrides:
supportsUpdate
in classJsonDeserializer<T extends JsonNode>
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_handleDuplicateField
protected void _handleDuplicateField(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory, java.lang.String fieldName, ObjectNode objectNode, JsonNode oldValue, JsonNode newValue) throws com.fasterxml.jackson.core.JsonProcessingException
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 foundobjectNode
- Object node that contains valuesoldValue
- Value that existed for the object node before newValue was addednewValue
- Newly added value just added to the object node- Throws:
com.fasterxml.jackson.core.JsonProcessingException
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deserializeObject
protected final ObjectNode deserializeObject(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws java.io.IOException
Method called to deserialize Object node instance when there is no existing node to modify.- Throws:
java.io.IOException
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deserializeObjectAtName
protected final ObjectNode deserializeObjectAtName(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws java.io.IOException
Alternate deserialization method used when parser already points to first FIELD_NAME and not START_OBJECT.- Throws:
java.io.IOException
- Since:
- 2.9
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updateObject
protected final JsonNode updateObject(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, ObjectNode node) throws java.io.IOException
Alternate deserialization method that is to update existingObjectNode
if possible.- Throws:
java.io.IOException
- Since:
- 2.9
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deserializeArray
protected final ArrayNode deserializeArray(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws java.io.IOException
- Throws:
java.io.IOException
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updateArray
protected final JsonNode updateArray(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, ArrayNode node) throws java.io.IOException
Alternate deserialization method that is to update existingObjectNode
if possible.- Throws:
java.io.IOException
- Since:
- 2.9
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deserializeAny
protected final JsonNode deserializeAny(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws java.io.IOException
- Throws:
java.io.IOException
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_fromInt
protected final JsonNode _fromInt(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws java.io.IOException
- Throws:
java.io.IOException
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_fromFloat
protected final JsonNode _fromFloat(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws java.io.IOException
- Throws:
java.io.IOException
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_fromEmbedded
protected final JsonNode _fromEmbedded(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws java.io.IOException
- Throws:
java.io.IOException
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