com.fasterxml.jackson.databind.deser.std

Class JsonNodeDeserializer

java.lang.Object

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

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

com.fasterxml.jackson.databind.deser.std.JsonNodeDeserializer

All Implemented Interfaces:

Serializable

public class JsonNodeDeserializer
extends StdDeserializer<JsonNode>

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

Methods

Modifier and Type	Method and Description
protected void	_handleDuplicateField(String fieldName, ObjectNode objectNode, JsonNode oldValue, JsonNode newValue) Method called when there is a duplicate value for a field.
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).

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

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

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

deserialize, getDelegatee, getEmptyValue, getKnownPropertyNames, getObjectIdReader, isCachable, 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

deserialize

public JsonNode deserialize(JsonParser jp,
                   DeserializationContext ctxt)
                     throws IOException,
                            JsonProcessingException

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:

Deserializer value

Throws:

IOException

JsonProcessingException

deserializeWithType

public Object deserializeWithType(JsonParser jp,
                         DeserializationContext ctxt,
                         TypeDeserializer typeDeserializer)
                           throws IOException,
                                  JsonProcessingException

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<JsonNode>

typeDeserializer - Deserializer to use for handling type information

Throws:

IOException

JsonProcessingException

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>

_reportProblem

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

Throws:

JsonMappingException

_handleDuplicateField

protected void _handleDuplicateField(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,
                                             JsonProcessingException

Throws:

IOException

JsonProcessingException

deserializeArray

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

Throws:

IOException

JsonProcessingException

deserializeAny

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

Throws:

IOException

JsonProcessingException