com.fasterxml.jackson.databind.deser.std
Class CollectionDeserializer

java.lang.Object
  extended by com.fasterxml.jackson.databind.JsonDeserializer<T>
      extended by com.fasterxml.jackson.databind.deser.std.StdDeserializer<T>
          extended by com.fasterxml.jackson.databind.deser.std.ContainerDeserializerBase<Collection<Object>>
              extended by com.fasterxml.jackson.databind.deser.std.CollectionDeserializer
All Implemented Interfaces:
ContextualDeserializer

public class CollectionDeserializer
extends ContainerDeserializerBase<Collection<Object>>
implements ContextualDeserializer

Basic serializer that can take JSON "Array" structure and construct a Collection instance, with typed contents.

Note: for untyped content (one indicated by passing Object.class as the type), UntypedObjectDeserializer is used instead. It can also construct Lists, but not with specific POJO types, only other containers and primitives/wrappers.


Nested Class Summary
 
Nested classes/interfaces inherited from class com.fasterxml.jackson.databind.JsonDeserializer
JsonDeserializer.None
 
Field Summary
protected  JavaType _collectionType
           
protected  JsonDeserializer<Object> _delegateDeserializer
          Deserializer that is used iff delegate-based creator is to be used for deserializing from JSON Object.
protected  JsonDeserializer<Object> _valueDeserializer
          Value deserializer.
protected  ValueInstantiator _valueInstantiator
           
protected  TypeDeserializer _valueTypeDeserializer
          If element instances have polymorphic type information, this is the type deserializer that can handle it
 
Fields inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer
_valueClass
 
Constructor Summary
protected CollectionDeserializer(CollectionDeserializer src)
          Copy-constructor that can be used by sub-classes to allow copy-on-write styling copying of settings of an existing instance.
  CollectionDeserializer(JavaType collectionType, JsonDeserializer<Object> valueDeser, TypeDeserializer valueTypeDeser, ValueInstantiator valueInstantiator)
          Constructor for context-free instances, where we do not yet know which property is using this deserializer.
protected CollectionDeserializer(JavaType collectionType, JsonDeserializer<Object> valueDeser, TypeDeserializer valueTypeDeser, ValueInstantiator valueInstantiator, JsonDeserializer<Object> delegateDeser)
          Constructor used when creating contextualized instances.
 
Method Summary
 CollectionDeserializer createContextual(DeserializationContext ctxt, BeanProperty property)
          Method called to finalize setup of this deserializer, when it is known for which property deserializer is needed for.
 Collection<Object> deserialize(com.fasterxml.jackson.core.JsonParser jp, DeserializationContext ctxt)
          Method that can be called to ask implementation to deserialize JSON content into the value type this serializer handles.
 Collection<Object> deserialize(com.fasterxml.jackson.core.JsonParser jp, DeserializationContext ctxt, Collection<Object> result)
          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(com.fasterxml.jackson.core.JsonParser jp, DeserializationContext ctxt, TypeDeserializer typeDeserializer)
          Base implementation that does not assume specific type inclusion mechanism.
 JsonDeserializer<Object> getContentDeserializer()
          Accesor for deserializer use for deserializing content values.
 JavaType getContentType()
          Accessor for declared type of contained value elements; either exact type, or one of its supertypes.
protected  CollectionDeserializer withResolved(JsonDeserializer<?> dd, JsonDeserializer<?> vd, TypeDeserializer vtd)
          Fluent-factory method call to construct contextual instance.
 
Methods inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer
_parseBoolean, _parseBooleanFromNumber, _parseBooleanPrimitive, _parseByte, _parseDate, _parseDouble, _parseDoublePrimitive, _parseFloat, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseShort, _parseShortPrimitive, findDeserializer, getValueClass, getValueType, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble
 
Methods inherited from class com.fasterxml.jackson.databind.JsonDeserializer
getEmptyValue, getKnownPropertyNames, getNullValue, getObjectIdReader, isCachable, unwrappingDeserializer
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

_collectionType

protected final JavaType _collectionType

_valueDeserializer

protected final JsonDeserializer<Object> _valueDeserializer
Value deserializer.


_valueTypeDeserializer

protected final TypeDeserializer _valueTypeDeserializer
If element instances have polymorphic type information, this is the type deserializer that can handle it


_valueInstantiator

protected final ValueInstantiator _valueInstantiator

_delegateDeserializer

protected final JsonDeserializer<Object> _delegateDeserializer
Deserializer that is used iff delegate-based creator is to be used for deserializing from JSON Object.

Constructor Detail

CollectionDeserializer

public CollectionDeserializer(JavaType collectionType,
                              JsonDeserializer<Object> valueDeser,
                              TypeDeserializer valueTypeDeser,
                              ValueInstantiator valueInstantiator)
Constructor for context-free instances, where we do not yet know which property is using this deserializer.


CollectionDeserializer

protected CollectionDeserializer(JavaType collectionType,
                                 JsonDeserializer<Object> valueDeser,
                                 TypeDeserializer valueTypeDeser,
                                 ValueInstantiator valueInstantiator,
                                 JsonDeserializer<Object> delegateDeser)
Constructor used when creating contextualized instances.


CollectionDeserializer

protected CollectionDeserializer(CollectionDeserializer src)
Copy-constructor that can be used by sub-classes to allow copy-on-write styling copying of settings of an existing instance.

Method Detail

withResolved

protected CollectionDeserializer withResolved(JsonDeserializer<?> dd,
                                              JsonDeserializer<?> vd,
                                              TypeDeserializer vtd)
Fluent-factory method call to construct contextual instance.


createContextual

public CollectionDeserializer createContextual(DeserializationContext ctxt,
                                               BeanProperty property)
                                        throws JsonMappingException
Method called to finalize setup of this deserializer, when it is known for which property deserializer is needed for.

Specified by:
createContextual in interface ContextualDeserializer
Parameters:
ctxt - Deserialization context to access configuration, additional deserializers that may be needed by this deserializer
property - 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)
Returns:
Deserializer to use for deserializing values of specified property; may be this instance or a new instance.
Throws:
JsonMappingException

getContentType

public JavaType getContentType()
Description copied from class: ContainerDeserializerBase
Accessor for declared type of contained value elements; either exact type, or one of its supertypes.

Specified by:
getContentType in class ContainerDeserializerBase<Collection<Object>>

getContentDeserializer

public JsonDeserializer<Object> getContentDeserializer()
Description copied from class: ContainerDeserializerBase
Accesor for deserializer use for deserializing content values.

Specified by:
getContentDeserializer in class ContainerDeserializerBase<Collection<Object>>

deserialize

public Collection<Object> deserialize(com.fasterxml.jackson.core.JsonParser jp,
                                      DeserializationContext ctxt)
                               throws IOException,
                                      com.fasterxml.jackson.core.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<Collection<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
com.fasterxml.jackson.core.JsonProcessingException

deserialize

public Collection<Object> deserialize(com.fasterxml.jackson.core.JsonParser jp,
                                      DeserializationContext ctxt,
                                      Collection<Object> result)
                               throws IOException,
                                      com.fasterxml.jackson.core.JsonProcessingException
Description copied from class: JsonDeserializer
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. Method is not necessarily used for all supported types; most commonly it is used for Collections and Maps.

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)

Overrides:
deserialize in class JsonDeserializer<Collection<Object>>
Throws:
IOException
com.fasterxml.jackson.core.JsonProcessingException

deserializeWithType

public Object deserializeWithType(com.fasterxml.jackson.core.JsonParser jp,
                                  DeserializationContext ctxt,
                                  TypeDeserializer typeDeserializer)
                           throws IOException,
                                  com.fasterxml.jackson.core.JsonProcessingException
Description copied from class: StdDeserializer
Base implementation that does not assume specific type inclusion mechanism. Sub-classes are expected to override this method if they are to handle type information.

Overrides:
deserializeWithType in class StdDeserializer<Collection<Object>>
typeDeserializer - Deserializer to use for handling type information
Throws:
IOException
com.fasterxml.jackson.core.JsonProcessingException


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