public class EnumDeserializer extends StdScalarDeserializer<java.lang.Object> implements ContextualDeserializer
JsonDeserializer.None
Constructor and Description |
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EnumDeserializer(EnumResolver byNameResolver)
Deprecated.
Since 2.9
|
EnumDeserializer(EnumResolver byNameResolver,
java.lang.Boolean caseInsensitive) |
Modifier and Type | Method and Description |
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JsonDeserializer<?> |
createContextual(DeserializationContext ctxt,
BeanProperty property)
Method called to see if a different (or differently configured) deserializer
is needed to deserialize values of specified property.
|
java.lang.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.
|
static JsonDeserializer<?> |
deserializerForCreator(DeserializationConfig config,
java.lang.Class<?> enumClass,
AnnotatedMethod factory)
Deprecated.
Since 2.8
|
static JsonDeserializer<?> |
deserializerForCreator(DeserializationConfig config,
java.lang.Class<?> enumClass,
AnnotatedMethod factory,
ValueInstantiator valueInstantiator,
SettableBeanProperty[] creatorProps)
Factory method used when Enum instances are to be deserialized
using a creator (static factory method)
|
static JsonDeserializer<?> |
deserializerForNoArgsCreator(DeserializationConfig config,
java.lang.Class<?> enumClass,
AnnotatedMethod factory)
Factory method used when Enum instances are to be deserialized
using a zero-/no-args factory method
|
boolean |
isCachable()
Because of costs associated with constructing Enum resolvers,
let's cache instances by default.
|
EnumDeserializer |
withResolved(java.lang.Boolean caseInsensitive) |
deserialize, deserializeWithType, getEmptyAccessPattern, getNullAccessPattern, supportsUpdate
getValueClass, getValueType, getValueType, handledType
deserializeWithType, findBackReference, getDelegatee, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullValue, getNullValue, getObjectIdReader, replaceDelegatee, unwrappingDeserializer
public EnumDeserializer(EnumResolver byNameResolver, java.lang.Boolean caseInsensitive)
@Deprecated public EnumDeserializer(EnumResolver byNameResolver)
@Deprecated public static JsonDeserializer<?> deserializerForCreator(DeserializationConfig config, java.lang.Class<?> enumClass, AnnotatedMethod factory)
public static JsonDeserializer<?> deserializerForCreator(DeserializationConfig config, java.lang.Class<?> enumClass, AnnotatedMethod factory, ValueInstantiator valueInstantiator, SettableBeanProperty[] creatorProps)
public static JsonDeserializer<?> deserializerForNoArgsCreator(DeserializationConfig config, java.lang.Class<?> enumClass, AnnotatedMethod factory)
public EnumDeserializer withResolved(java.lang.Boolean caseInsensitive)
public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property) throws JsonMappingException
ContextualDeserializer
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()
isCachable
in class JsonDeserializer<java.lang.Object>
public java.lang.Object deserialize(JsonParser p, DeserializationContext ctxt) throws java.io.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.currentToken() == 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<java.lang.Object>
p
- Parsed used for reading JSON contentctxt
- Context that can be used to access information about
this deserialization activity.java.io.IOException
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