public class UntypedObjectDeserializer extends StdDeserializer<Object> implements ResolvableDeserializer, ContextualDeserializer
Object
(either explicitly, or due to type erasure).
If so, "natural" mapping is used to convert JSON values to their natural
Java object matches: JSON arrays to Java List
s (or, if configured,
Object[]), JSON objects to Map
s, numbers to
Number
s, booleans to Boolean
s and
strings to String
(and nulls to nulls).Modifier and Type | Class and Description |
---|---|
static class |
UntypedObjectDeserializer.Vanilla |
JsonDeserializer.None
Modifier and Type | Field and Description |
---|---|
protected JsonDeserializer<Object> |
_listDeserializer |
protected JavaType |
_listType
If
List has been mapped to non-default implementation,
we'll store type here |
protected JsonDeserializer<Object> |
_mapDeserializer |
protected JavaType |
_mapType
If
Map has been mapped to non-default implementation,
we'll store type here |
protected boolean |
_nonMerging |
protected JsonDeserializer<Object> |
_numberDeserializer |
protected JsonDeserializer<Object> |
_stringDeserializer |
protected static Object[] |
NO_OBJECTS |
_valueClass, F_MASK_ACCEPT_ARRAYS, F_MASK_INT_COERCIONS
Modifier | Constructor and Description |
---|---|
|
UntypedObjectDeserializer()
Deprecated.
Since 2.6 use variant takes type arguments
|
|
UntypedObjectDeserializer(JavaType listType,
JavaType mapType) |
protected |
UntypedObjectDeserializer(UntypedObjectDeserializer base,
boolean nonMerging) |
|
UntypedObjectDeserializer(UntypedObjectDeserializer base,
JsonDeserializer<?> mapDeser,
JsonDeserializer<?> listDeser,
JsonDeserializer<?> stringDeser,
JsonDeserializer<?> numberDeser) |
Modifier and Type | Method and Description |
---|---|
protected JsonDeserializer<Object> |
_clearIfStdImpl(JsonDeserializer<Object> deser) |
protected JsonDeserializer<Object> |
_findCustomDeser(DeserializationContext ctxt,
JavaType type) |
JsonDeserializer<?> |
createContextual(DeserializationContext ctxt,
BeanProperty property)
We only use contextualization for optimizing the case where no customization
occurred; if so, can slip in a more streamlined version.
|
Object |
deserialize(JsonParser p,
DeserializationContext ctxt)
Method that can be called to ask implementation to deserialize
JSON content into the value type this serializer handles.
|
Object |
deserialize(JsonParser p,
DeserializationContext ctxt,
Object intoValue)
Alternate deserialization method (compared to the most commonly
used,
JsonDeserializer.deserialize(JsonParser, DeserializationContext) ),
which takes in initialized value instance, to be
configured and/or populated by deserializer. |
Object |
deserializeWithType(JsonParser p,
DeserializationContext ctxt,
TypeDeserializer typeDeserializer)
Base implementation that does not assume specific type
inclusion mechanism.
|
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).
|
protected Object |
mapArray(JsonParser p,
DeserializationContext ctxt)
Method called to map a JSON Array into a Java value.
|
protected Object |
mapArray(JsonParser p,
DeserializationContext ctxt,
Collection<Object> result) |
protected Object[] |
mapArrayToArray(JsonParser p,
DeserializationContext ctxt)
Method called to map a JSON Array into a Java Object array (Object[]).
|
protected Object |
mapObject(JsonParser p,
DeserializationContext ctxt)
Method called to map a JSON Object into a Java value.
|
protected Object |
mapObject(JsonParser p,
DeserializationContext ctxt,
Map<Object,Object> m) |
void |
resolve(DeserializationContext ctxt)
We need to implement this method to properly find things to delegate
to: it cannot be done earlier since delegated deserializers almost
certainly require access to this instance (at least "List" and "Map" ones)
|
Boolean |
supportsUpdate(DeserializationConfig config)
Introspection method that may be called to see whether deserializer supports
update of an existing value (aka "merging") or not.
|
_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, handledType, handleMissingEndArrayForSingle, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble
findBackReference, getDelegatee, getEmptyAccessPattern, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullAccessPattern, getNullValue, getNullValue, getObjectIdReader, replaceDelegatee, unwrappingDeserializer
protected static final Object[] NO_OBJECTS
protected JsonDeserializer<Object> _mapDeserializer
protected JsonDeserializer<Object> _listDeserializer
protected JsonDeserializer<Object> _stringDeserializer
protected JsonDeserializer<Object> _numberDeserializer
protected JavaType _listType
List
has been mapped to non-default implementation,
we'll store type hereprotected JavaType _mapType
Map
has been mapped to non-default implementation,
we'll store type hereprotected final boolean _nonMerging
@Deprecated public UntypedObjectDeserializer()
public UntypedObjectDeserializer(UntypedObjectDeserializer base, JsonDeserializer<?> mapDeser, JsonDeserializer<?> listDeser, JsonDeserializer<?> stringDeser, JsonDeserializer<?> numberDeser)
protected UntypedObjectDeserializer(UntypedObjectDeserializer base, boolean nonMerging)
public void resolve(DeserializationContext ctxt) throws JsonMappingException
resolve
in interface ResolvableDeserializer
ctxt
- Context to use for accessing configuration, resolving
secondary deserializersJsonMappingException
protected JsonDeserializer<Object> _findCustomDeser(DeserializationContext ctxt, JavaType type) throws JsonMappingException
JsonMappingException
protected JsonDeserializer<Object> _clearIfStdImpl(JsonDeserializer<Object> deser)
public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property) throws JsonMappingException
createContextual
in interface ContextualDeserializer
ctxt
- Deserialization context to access configuration, additional
deserializers that may be needed by this deserializerproperty
- 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)JsonMappingException
public boolean isCachable()
JsonDeserializer
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.
isCachable
in class JsonDeserializer<Object>
public Boolean supportsUpdate(DeserializationConfig config)
JsonDeserializer
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
deserialization 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.
supportsUpdate
in class JsonDeserializer<Object>
public Object deserialize(JsonParser p, DeserializationContext ctxt) throws IOException
JsonDeserializer
Pre-condition for this method is that the parser points to the first event that is part of value to deserializer (and which is never JSON 'null' literal, more on this below): for simple types it may be the only value; and for structured types the Object start marker or a FIELD_NAME.
The two possible input conditions for structured types result from polymorphism via fields. In the ordinary case, Jackson calls this method when it has encountered an OBJECT_START, and the method implementation must advance to the next token to see the first field name. If the application configures polymorphism via a field, then the object looks like the following.
{ "@class": "class name", ... }Jackson consumes the two tokens (the @class field name and its value) in order to learn the class and select the deserializer. Thus, the stream is pointing to the FIELD_NAME for the first field after the @class. Thus, if you want your method to work correctly both with and without polymorphism, you must begin your method with:
if (p.getCurrentToken() == JsonToken.START_OBJECT) { p.nextToken(); }This results in the stream pointing to the field name, so that the two conditions align.
Post-condition is that the parser will point to the last event that is part of deserialized value (or in case deserialization fails, event that was not recognized or usable, which may be the same event as the one it pointed to upon call).
Note that this method is never called for JSON null literal, and thus deserializers need (and should) not check for it.
deserialize
in class JsonDeserializer<Object>
p
- Parsed used for reading JSON contentctxt
- Context that can be used to access information about
this deserialization activity.IOException
public Object deserializeWithType(JsonParser p, DeserializationContext ctxt, TypeDeserializer typeDeserializer) throws IOException
StdDeserializer
deserializeWithType
in class StdDeserializer<Object>
typeDeserializer
- Deserializer to use for handling type informationIOException
public Object deserialize(JsonParser p, DeserializationContext ctxt, Object intoValue) throws IOException
JsonDeserializer
JsonDeserializer.deserialize(JsonParser, DeserializationContext)
),
which takes in initialized value instance, to be
configured and/or populated by deserializer.
Method is not necessarily used (or supported) by all types
(it will not work for immutable types, for obvious reasons):
most commonly it is used for Collections and Maps.
It may be used both with "updating readers" (for POJOs) and
when Collections and Maps use "getter as setter".
Default implementation just throws
UnsupportedOperationException
, to indicate that types
that do not explicitly add support do not necessarily support
update-existing-value operation (esp. immutable types)
deserialize
in class JsonDeserializer<Object>
IOException
protected Object mapArray(JsonParser p, DeserializationContext ctxt) throws IOException
IOException
protected Object mapArray(JsonParser p, DeserializationContext ctxt, Collection<Object> result) throws IOException
IOException
protected Object mapObject(JsonParser p, DeserializationContext ctxt) throws IOException
IOException
protected Object[] mapArrayToArray(JsonParser p, DeserializationContext ctxt) throws IOException
IOException
protected Object mapObject(JsonParser p, DeserializationContext ctxt, Map<Object,Object> m) throws IOException
IOException
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