com.fasterxml.jackson.databind.deser.std

Class JsonNodeDeserializer

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:

Serializable

public class JsonNodeDeserializer
extends StdDeserializer<T>

Deserializer that can build instances of JsonNode from any JSON content, using appropriate JsonNode type.

See Also:

Serialized Form

Nested Class Summary

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

JsonDeserializer.None

Field Summary

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

_valueClass

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JsonNodeDeserializer()

Method Summary

Modifier and Type	Method and Description
protected JsonNode	_fromEmbedded(JsonParser jp, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected JsonNode	_fromFloat(JsonParser jp, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected JsonNode	_fromInt(JsonParser jp, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected void	_handleDuplicateField(JsonParser jp, DeserializationContext ctxt, JsonNodeFactory nodeFactory, String fieldName, ObjectNode objectNode, JsonNode oldValue, JsonNode newValue) Method called when there is a duplicate value for a field.
protected void	_handleDuplicateField(String fieldName, ObjectNode objectNode, JsonNode oldValue, JsonNode newValue) Deprecated. Since 2.3, use the overloaded variant
protected void	_reportProblem(JsonParser jp, String msg)
JsonNode	deserialize(JsonParser jp, 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(JsonParser jp, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected ArrayNode	deserializeArray(JsonParser jp, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
protected ObjectNode	deserializeObject(JsonParser jp, DeserializationContext ctxt, JsonNodeFactory nodeFactory)
Object	deserializeWithType(JsonParser jp, DeserializationContext ctxt, TypeDeserializer typeDeserializer) Base implementation that does not assume specific type inclusion mechanism.
static JsonDeserializer<? extends JsonNode>	getDeserializer(Class<?> nodeClass) Factory method for accessing deserializer for specific node type
JsonNode	getNullValue() 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).

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

_deserializeFromEmpty, _hasTextualNull, _isNaN, _isNegInf, _isPosInf, _parseBoolean, _parseBooleanFromNumber, _parseBooleanPrimitive, _parseByte, _parseDate, _parseDouble, _parseDoublePrimitive, _parseFloat, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseShort, _parseShortPrimitive, _parseString, findConvertingContentDeserializer, findDeserializer, getValueClass, getValueType, handledType, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble

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

deserialize, findBackReference, getDelegatee, getEmptyValue, getKnownPropertyNames, getObjectIdReader, replaceDelegatee, unwrappingDeserializer

Methods inherited from class java.lang.Object

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

Constructor Detail

JsonNodeDeserializer

protected JsonNodeDeserializer()

Method Detail

getDeserializer

public static JsonDeserializer<? extends JsonNode> getDeserializer(Class<?> nodeClass)

Factory method for accessing deserializer for specific node type

getNullValue

public JsonNode getNullValue()

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.

Note that deserializers are allowed to call this just once and then reuse returned value; that is, method is not guaranteed to be called once for each conversion.

Default implementation simply returns null.

Overrides:

getNullValue in class JsonDeserializer<JsonNode>

deserialize

public JsonNode deserialize(JsonParser jp,
                            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:

jp - Parsed used for reading JSON content

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

Returns:

Deserialized value

Throws:

IOException

deserializeWithType

public Object deserializeWithType(JsonParser jp,
                                  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

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>

_reportProblem

protected void _reportProblem(JsonParser jp,
                              String msg)
                       throws JsonMappingException

Throws:

JsonMappingException

_handleDuplicateField

@Deprecated
protected void _handleDuplicateField(String fieldName,
                                                 ObjectNode objectNode,
                                                 JsonNode oldValue,
                                                 JsonNode newValue)
                                          throws JsonProcessingException

Deprecated. Since 2.3, use the overloaded variant

Throws:

JsonProcessingException

_handleDuplicateField

protected void _handleDuplicateField(JsonParser jp,
                                     DeserializationContext ctxt,
                                     JsonNodeFactory nodeFactory,
                                     String fieldName,
                                     ObjectNode objectNode,
                                     JsonNode oldValue,
                                     JsonNode newValue)
                              throws 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 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:

JsonProcessingException

deserializeObject

protected final ObjectNode deserializeObject(JsonParser jp,
                                             DeserializationContext ctxt,
                                             JsonNodeFactory nodeFactory)
                                      throws IOException

Throws:

IOException

deserializeArray

protected final ArrayNode deserializeArray(JsonParser jp,
                                           DeserializationContext ctxt,
                                           JsonNodeFactory nodeFactory)
                                    throws IOException

Throws:

IOException

deserializeAny

protected final JsonNode deserializeAny(JsonParser jp,
                                        DeserializationContext ctxt,
                                        JsonNodeFactory nodeFactory)
                                 throws IOException

Throws:

IOException

_fromInt

protected final JsonNode _fromInt(JsonParser jp,
                                  DeserializationContext ctxt,
                                  JsonNodeFactory nodeFactory)
                           throws IOException

Throws:

IOException

_fromFloat

protected final JsonNode _fromFloat(JsonParser jp,
                                    DeserializationContext ctxt,
                                    JsonNodeFactory nodeFactory)
                             throws IOException

Throws:

IOException

_fromEmbedded

protected final JsonNode _fromEmbedded(JsonParser jp,
                                       DeserializationContext ctxt,
                                       JsonNodeFactory nodeFactory)
                                throws IOException

Throws:

IOException