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 Lists (or, if configured,
Object[]), JSON objects to Maps, numbers to
Numbers, booleans to Booleans 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 JsonDeserializer<Object> |
_numberDeserializer |
protected JsonDeserializer<Object> |
_stringDeserializer |
static UntypedObjectDeserializer |
instance
Deprecated.
Since 2.3, construct a new instance, needs to be resolved
|
protected static Object[] |
NO_OBJECTS |
_valueClass, F_MASK_INT_COERCIONS| Constructor and Description |
|---|
UntypedObjectDeserializer()
Deprecated.
Since 2.6 use variant takes type arguments
|
UntypedObjectDeserializer(JavaType listType,
JavaType mapType) |
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) |
protected JsonDeserializer<?> |
_withResolved(JsonDeserializer<?> mapDeser,
JsonDeserializer<?> listDeser,
JsonDeserializer<?> stringDeser,
JsonDeserializer<?> numberDeser) |
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 |
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 jp,
DeserializationContext ctxt)
Method called to map a JSON Array into a Java value.
|
protected Object[] |
mapArrayToArray(JsonParser jp,
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.
|
void |
resolve(DeserializationContext ctxt)
We need to implement this method to properly find things to delegate
to: it can not be done earlier since delegated deserializers almost
certainly require access to this instance (at least "List" and "Map" ones)
|
_coerceIntegral, _deserializeFromEmpty, _failDoubleToIntCoercion, _hasTextualNull, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _parseBoolean, _parseBooleanFromOther, _parseBooleanPrimitive, _parseByte, _parseDate, _parseDouble, _parseDoublePrimitive, _parseFloat, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseShort, _parseShortPrimitive, _parseString, findConvertingContentDeserializer, findDeserializer, findFormatFeature, findFormatOverrides, getValueClass, getValueType, handledType, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDoubledeserialize, findBackReference, getDelegatee, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullValue, getNullValue, getObjectIdReader, replaceDelegatee, unwrappingDeserializerprotected static final Object[] NO_OBJECTS
@Deprecated public static final UntypedObjectDeserializer instance
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 here@Deprecated public UntypedObjectDeserializer()
public UntypedObjectDeserializer(UntypedObjectDeserializer base, JsonDeserializer<?> mapDeser, JsonDeserializer<?> listDeser, JsonDeserializer<?> stringDeser, JsonDeserializer<?> numberDeser)
public void resolve(DeserializationContext ctxt) throws JsonMappingException
resolve in interface ResolvableDeserializerctxt - Context to use for accessing configuration, resolving
secondary deserializersJsonMappingExceptionprotected JsonDeserializer<Object> _findCustomDeser(DeserializationContext ctxt, JavaType type) throws JsonMappingException
JsonMappingExceptionprotected JsonDeserializer<Object> _clearIfStdImpl(JsonDeserializer<Object> deser)
public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property) throws JsonMappingException
createContextual in interface ContextualDeserializerctxt - 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 can not provide it and
null is passed instead (in which case impls usually pass 'this' deserializer as is)JsonMappingExceptionprotected JsonDeserializer<?> _withResolved(JsonDeserializer<?> mapDeser, JsonDeserializer<?> listDeser, JsonDeserializer<?> stringDeser, JsonDeserializer<?> numberDeser)
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 Object deserialize(JsonParser p, DeserializationContext ctxt) throws IOException
JsonDeserializerPre-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 (jp.getCurrentToken() == JsonToken.START_OBJECT) {
jp.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.IOExceptionpublic Object deserializeWithType(JsonParser p, DeserializationContext ctxt, TypeDeserializer typeDeserializer) throws IOException
StdDeserializerdeserializeWithType in class StdDeserializer<Object>typeDeserializer - Deserializer to use for handling type informationIOExceptionprotected Object mapArray(JsonParser jp, DeserializationContext ctxt) throws IOException
IOExceptionprotected Object mapObject(JsonParser p, DeserializationContext ctxt) throws IOException
IOExceptionprotected Object[] mapArrayToArray(JsonParser jp, DeserializationContext ctxt) throws IOException
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