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,Serializable
public class JsonNodeDeserializer extends StdDeserializer<T>
Deserializer that can build instances ofJsonNodefrom any JSON content, using appropriateJsonNodetype.- 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 Boolean_supportsUpdates-
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 protectedJsonNodeDeserializer()
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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, String fieldName, ObjectNode objectNode, JsonNode oldValue, JsonNode newValue)Method called when there is a duplicate value for a field.JsonNodedeserialize(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 JsonNodedeserializeAny(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)protected ArrayNodedeserializeArray(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory)protected ObjectNodedeserializeObject(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 ObjectNodedeserializeObjectAtName(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.ObjectdeserializeWithType(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(Class<?> nodeClass)Factory method for accessing deserializer for specific node typeJsonNodegetNullValue(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).booleanisCachable()Method called to see if deserializer instance is cachable and usable for other properties of same type (type for which instance was created).BooleansupportsUpdate(DeserializationConfig config)Introspection method that may be called to see whether deserializer supports update of an existing value (aka "merging") or not.protected JsonNodeupdateArray(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, ArrayNode node)Alternate deserialization method that is to update existingObjectNodeif possible.protected JsonNodeupdateObject(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, ObjectNode node)Alternate deserialization method that is to update existingObjectNodeif possible.-
Methods inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer
_byteOverflow, _coercedTypeDesc, _coerceEmptyString, _coerceIntegral, _coerceNullToken, _coerceTextualNull, _deserializeFromArray, _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, getValueType, handledType, handleMissingEndArrayForSingle, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble
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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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Field Detail
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_supportsUpdates
protected final Boolean _supportsUpdates
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Method Detail
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getDeserializer
public static JsonDeserializer<? extends JsonNode> getDeserializer(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:JsonDeserializerMethod 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:
getNullValuein interfaceNullValueProvider- Overrides:
getNullValuein classJsonDeserializer<JsonNode>
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deserialize
public JsonNode deserialize(com.fasterxml.jackson.core.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:
deserializein 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:
IOException
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deserializeWithType
public Object deserializeWithType(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, TypeDeserializer typeDeserializer) throws IOException
Description copied from class:StdDeserializerBase 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:
deserializeWithTypein classStdDeserializer<T extends JsonNode>typeDeserializer- Deserializer to use for handling type information- Throws:
IOException
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isCachable
public boolean isCachable()
Description copied from class:JsonDeserializerMethod 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:
isCachablein classJsonDeserializer<T extends JsonNode>
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supportsUpdate
public Boolean supportsUpdate(DeserializationConfig config)
Description copied from class:JsonDeserializerIntrospection method that may be called to see whether deserializer supports update of an existing value (aka "merging") or not. Return value should either beBoolean.FALSEif update is not supported at all (immutable values);Boolean.TRUEif update should usually work (regular POJOs, for example), ornullif 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.FALSEreturned, or inclusion ifBoolean.TRUEis specified. If "unknown" case (nullreturned) behavior is to exclude property if global defaults used; or to allow if explicit per-type or property merging is defined.Default implementation returns
nullto allow explicit per-type or per-property attempts.- Overrides:
supportsUpdatein classJsonDeserializer<T extends JsonNode>
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_handleDuplicateField
protected void _handleDuplicateField(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory, String fieldName, ObjectNode objectNode, JsonNode oldValue, JsonNode newValue) throws com.fasterxml.jackson.core.JsonProcessingExceptionMethod 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 IOException
Method called to deserialize Object node instance when there is no existing node to modify.- Throws:
IOException
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deserializeObjectAtName
protected final ObjectNode deserializeObjectAtName(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws IOException
Alternate deserialization method used when parser already points to first FIELD_NAME and not START_OBJECT.- Throws:
IOException- Since:
- 2.9
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updateObject
protected final JsonNode updateObject(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, ObjectNode node) throws IOException
Alternate deserialization method that is to update existingObjectNodeif possible.- Throws:
IOException- Since:
- 2.9
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deserializeArray
protected final ArrayNode deserializeArray(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws IOException
- Throws:
IOException
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updateArray
protected final JsonNode updateArray(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, ArrayNode node) throws IOException
Alternate deserialization method that is to update existingObjectNodeif possible.- Throws:
IOException- Since:
- 2.9
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deserializeAny
protected final JsonNode deserializeAny(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws IOException
- Throws:
IOException
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_fromInt
protected final JsonNode _fromInt(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws IOException
- Throws:
IOException
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_fromFloat
protected final JsonNode _fromFloat(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws IOException
- Throws:
IOException
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_fromEmbedded
protected final JsonNode _fromEmbedded(com.fasterxml.jackson.core.JsonParser p, DeserializationContext ctxt, JsonNodeFactory nodeFactory) throws IOException
- Throws:
IOException
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