AbstractDeserializer (jackson-databind 2.2.4)

java.lang.Object
- com.fasterxml.jackson.databind.JsonDeserializer<Object>
- - com.fasterxml.jackson.databind.deser.AbstractDeserializer

All Implemented Interfaces:

Serializable
```
public class AbstractDeserializer
extends JsonDeserializer<Object>
implements Serializable
```
Deserializer only used for abstract types used as placeholders during polymorphic type handling deserialization. If so, there is no real deserializer associated with nominal type, just TypeDeserializer; and any calls that do not pass such resolver will result in an error.

Author:

tatu

See Also:
Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.JsonDeserializer
  JsonDeserializer.None

Field Summary

Fields
Modifier and Type	Field and Description
`protected boolean`	`_acceptBoolean`
`protected boolean`	`_acceptDouble`
`protected boolean`	`_acceptInt`
`protected boolean`	`_acceptString`
`protected Map<String,SettableBeanProperty>`	`_backRefProperties`
`protected JavaType`	`_baseType`
`protected ObjectIdReader`	`_objectIdReader`

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`AbstractDeserializer(BeanDescription beanDesc)`
	`AbstractDeserializer(BeanDeserializerBuilder builder, BeanDescription beanDesc, Map<String,SettableBeanProperty> backRefProps)`

Method Summary

Methods
Modifier and Type	Method and Description
`protected Object`	`_deserializeFromObjectId(JsonParser jp, DeserializationContext ctxt)` Method called in cases where it looks like we got an Object Id to parse and use as a reference.
`protected Object`	`_deserializeIfNatural(JsonParser jp, DeserializationContext ctxt)`
`static AbstractDeserializer`	`constructForNonPOJO(BeanDescription beanDesc)` Factory method used when constructing instances for non-POJO types, like `Map`s.
`Object`	`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)` Deserialization called when type being deserialized is defined to contain additional type identifier, to allow for correctly instantiating correct subtype.
`SettableBeanProperty`	`findBackReference(String logicalName)` Method called by `BeanDeserializer` to resolve back reference part of managed references.
`ObjectIdReader`	`getObjectIdReader()` Overridden to return true for those instances that are handling value for which Object Identity handling is enabled (either via value type or referring property).
`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).

Methods inherited from class com.fasterxml.jackson.databind.JsonDeserializer
deserialize, getDelegatee, getEmptyValue, getKnownPropertyNames, getNullValue, replaceDelegatee, unwrappingDeserializer

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - _baseType
```
protected final JavaType _baseType
```
  - _objectIdReader
```
protected final ObjectIdReader _objectIdReader
```
  - _backRefProperties
```
protected final Map<String,SettableBeanProperty> _backRefProperties
```
  - _acceptString
```
protected final boolean _acceptString
```
  - _acceptBoolean
```
protected final boolean _acceptBoolean
```
  - _acceptInt
```
protected final boolean _acceptInt
```
  - _acceptDouble
```
protected final boolean _acceptDouble
```
- Constructor Detail
  - AbstractDeserializer
```
public AbstractDeserializer(BeanDeserializerBuilder builder,
                    BeanDescription beanDesc,
                    Map<String,SettableBeanProperty> backRefProps)
```
  - AbstractDeserializer
```
protected AbstractDeserializer(BeanDescription beanDesc)
```
- Method Detail
  - constructForNonPOJO
```
public static AbstractDeserializer constructForNonPOJO(BeanDescription beanDesc)
```
    Factory method used when constructing instances for non-POJO types, like Maps.
    
    Since:
    
    2.3
  - isCachable
```
public boolean isCachable()
```
    Description copied from class: JsonDeserializer
    
    Method 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:
    
    isCachable in class JsonDeserializer<Object>
  - getObjectIdReader
```
public ObjectIdReader getObjectIdReader()
```
    Overridden to return true for those instances that are handling value for which Object Identity handling is enabled (either via value type or referring property).
    
    Overrides:
    
    getObjectIdReader in class JsonDeserializer<Object>
    
    Returns:
    ObjectIdReader used for resolving possible Object Identifier value, instead of full value serialization, if deserializer can do that; null if no Object Id is expected.
  - findBackReference
```
public SettableBeanProperty findBackReference(String logicalName)
```
    Method called by BeanDeserializer to resolve back reference part of managed references.
  - deserializeWithType
```
public Object deserializeWithType(JsonParser jp,
                         DeserializationContext ctxt,
                         TypeDeserializer typeDeserializer)
                           throws IOException,
                                  JsonProcessingException
```
    Description copied from class: JsonDeserializer
    
    Deserialization called when type being deserialized is defined to contain additional type identifier, to allow for correctly instantiating correct subtype. This can be due to annotation on type (or its supertype), or due to global settings without annotations.
    Default implementation may work for some types, but ideally subclasses should not rely on current default implementation. Implementation is mostly provided to avoid compilation errors with older code.
    
    Overrides:
    
    deserializeWithType in class JsonDeserializer<Object>
    
    typeDeserializer - Deserializer to use for handling type information
    
    Throws:
    
    IOException
    
    JsonProcessingException
  - deserialize
```
public Object deserialize(JsonParser jp,
                 DeserializationContext ctxt)
                   throws IOException,
                          JsonProcessingException
```
    Description copied from class: JsonDeserializer
    
    Method that can be called to ask implementation to deserialize JSON content into the value type this serializer handles. Returned instance is to be constructed by method itself.
    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.
    
    Specified by:
    
    deserialize in class JsonDeserializer<Object>
    
    Parameters:
    jp - Parsed used for reading JSON content
    ctxt - Context that can be used to access information about this deserialization activity.
    
    Returns:
    Deserializer value
    
    Throws:
    
    IOException
    
    JsonProcessingException
  - _deserializeIfNatural
```
protected Object _deserializeIfNatural(JsonParser jp,
                           DeserializationContext ctxt)
                                throws IOException,
                                       JsonProcessingException
```
    Throws:
    
    IOException
    
    JsonProcessingException
  - _deserializeFromObjectId
```
protected Object _deserializeFromObjectId(JsonParser jp,
                              DeserializationContext ctxt)
                                   throws IOException,
                                          JsonProcessingException
```
    Method called in cases where it looks like we got an Object Id to parse and use as a reference.
    
    Throws:
    
    IOException
    
    JsonProcessingException

Class AbstractDeserializer

Nested Class Summary

Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.JsonDeserializer

Field Summary

Constructor Summary

Method Summary

Methods inherited from class com.fasterxml.jackson.databind.JsonDeserializer

Methods inherited from class java.lang.Object

Field Detail

_baseType

_objectIdReader

_backRefProperties

_acceptString

_acceptBoolean

_acceptInt

_acceptDouble

Constructor Detail

AbstractDeserializer

AbstractDeserializer

Method Detail

constructForNonPOJO

isCachable

getObjectIdReader

findBackReference

deserializeWithType

deserialize

_deserializeIfNatural

_deserializeFromObjectId