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java.lang.Object com.fasterxml.jackson.databind.JsonDeserializer<T> com.fasterxml.jackson.databind.deser.std.StdDeserializer<T> com.fasterxml.jackson.databind.deser.std.StdDelegatingDeserializer<T>
T
- Target type to convert to, from delegate typepublic class StdDelegatingDeserializer<T>
Deserializer implementation where given Java type is first deserialized
by a standard Jackson deserializer into a delegate type; and then
this delegate type is converted using a configured
Converter
into desired target type.
Common delegate types to use are Map
and JsonNode
.
Note that although types (delegate, target) may be related, they must not be same; trying to do this will result in an exception.
Nested Class Summary |
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Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.JsonDeserializer |
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JsonDeserializer.None |
Field Summary | |
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protected Converter<Object,T> |
_converter
|
protected JsonDeserializer<Object> |
_delegateDeserializer
Underlying serializer for type T<.code>. |
protected JavaType |
_delegateType
Fully resolved delegate type, with generic information if any available. |
Fields inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer |
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_valueClass |
Constructor Summary | |
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|
StdDelegatingDeserializer(Converter<?,T> converter)
|
protected |
StdDelegatingDeserializer(Converter<Object,T> converter,
JavaType delegateType,
JsonDeserializer<?> delegateDeserializer)
|
Method Summary | |
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protected T |
convertValue(Object delegateValue)
Method called to convert from "delegate value" (which was deserialized from JSON using standard Jackson deserializer for delegate type) into desired target type. |
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. |
T |
deserialize(JsonParser jp,
DeserializationContext ctxt)
Method that can be called to ask implementation to deserialize JSON content into the value type this serializer handles. |
Object |
deserializeWithType(JsonParser jp,
DeserializationContext ctxt,
TypeDeserializer typeDeserializer)
Base implementation that does not assume specific type inclusion mechanism. |
JsonDeserializer<?> |
getDelegatee()
Accessor that can be used to determine if this deserializer uses another deserializer for actual deserialization, by delegating calls. |
protected StdDelegatingDeserializer<T> |
withDelegate(Converter<Object,T> converter,
JavaType delegateType,
JsonDeserializer<?> delegateDeserializer)
Method used for creating resolved contextual instances. |
Methods inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer |
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_parseBoolean, _parseBooleanFromNumber, _parseBooleanPrimitive, _parseByte, _parseDate, _parseDouble, _parseDoublePrimitive, _parseFloat, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseShort, _parseShortPrimitive, _parseString, findDeserializer, getValueClass, getValueType, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble |
Methods inherited from class com.fasterxml.jackson.databind.JsonDeserializer |
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deserialize, getEmptyValue, getKnownPropertyNames, getNullValue, getObjectIdReader, isCachable, replaceDelegatee, unwrappingDeserializer |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected final Converter<Object,T> _converter
protected final JavaType _delegateType
protected final JsonDeserializer<Object> _delegateDeserializer
T<.code>.
Constructor Detail |
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public StdDelegatingDeserializer(Converter<?,T> converter)
protected StdDelegatingDeserializer(Converter<Object,T> converter, JavaType delegateType, JsonDeserializer<?> delegateDeserializer)
Method Detail |
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protected StdDelegatingDeserializer<T> withDelegate(Converter<Object,T> converter, JavaType delegateType, JsonDeserializer<?> delegateDeserializer)
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 can not provide it and
null is passed instead (in which case impls usually pass 'this' deserializer as is)
JsonMappingException
public JsonDeserializer<?> getDelegatee()
JsonDeserializer
getDelegatee
in class JsonDeserializer<T>
public T deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException
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. 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<T>
jp
- Parsed used for reading JSON contentctxt
- Context that can be used to access information about
this deserialization activity.
IOException
JsonProcessingException
public Object deserializeWithType(JsonParser jp, DeserializationContext ctxt, TypeDeserializer typeDeserializer) throws IOException, JsonProcessingException
StdDeserializer
deserializeWithType
in class StdDeserializer<T>
typeDeserializer
- Deserializer to use for handling type information
IOException
JsonProcessingException
protected T convertValue(Object delegateValue)
The default implementation uses configured Converter
to do
conversion.
delegateValue
-
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