com.fasterxml.jackson.databind.deser.impl

Class BeanAsArrayDeserializer

java.lang.Object

com.fasterxml.jackson.databind.JsonDeserializer<T>

com.fasterxml.jackson.databind.deser.std.StdDeserializer<Object>

com.fasterxml.jackson.databind.deser.BeanDeserializerBase

com.fasterxml.jackson.databind.deser.impl.BeanAsArrayDeserializer

All Implemented Interfaces:

ContextualDeserializer, ResolvableDeserializer, Serializable

public class BeanAsArrayDeserializer
extends BeanDeserializerBase

Variant of BeanDeserializer used for handling deserialization of POJOs when serialized as JSON Arrays, instead of JSON Objects.

Since:

2.1

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 BeanDeserializerBase	_delegate Deserializer we delegate operations that we can not handle.
protected SettableBeanProperty[]	_orderedProperties Properties in order expected to be found in JSON array.

Fields inherited from class com.fasterxml.jackson.databind.deser.BeanDeserializerBase

_anySetter, _backRefs, _beanProperties, _beanType, _delegateDeserializer, _externalTypeIdHandler, _ignorableProps, _ignoreAllUnknown, _injectables, _needViewProcesing, _nonStandardCreation, _objectIdReader, _propertyBasedCreator, _serializationShape, _subDeserializers, _unwrappedPropertyHandler, _valueInstantiator, _vanillaProcessing, TEMP_PROPERTY_NAME

Fields inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer

_valueClass

Constructor Summary

Constructors

Constructor and Description
BeanAsArrayDeserializer(BeanDeserializerBase delegate, SettableBeanProperty[] ordered) Main constructor used both for creating new instances (by BeanDeserializer.asArrayDeserializer()) and for creating copies with different delegate.

Method Summary

Methods

Modifier and Type	Method and Description
protected Object	_deserializeFromNonArray(JsonParser jp, DeserializationContext ctxt)
protected Object	_deserializeNonVanilla(JsonParser jp, DeserializationContext ctxt) Alternate deserialization method that has to check many more configuration aspects than the "vanilla" processing.
protected Object	_deserializeUsingPropertyBased(JsonParser jp, DeserializationContext ctxt) Method called to deserialize bean using "property-based creator": this means that a non-default constructor or factory method is called, and then possibly other setters.
protected Object	_deserializeWithCreator(JsonParser jp, DeserializationContext ctxt)
protected BeanDeserializerBase	asArrayDeserializer() Fluent factory for creating a variant that can handle POJO output as a JSON Array.
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	deserialize(JsonParser jp, DeserializationContext ctxt, Object bean) 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	deserializeFromObject(JsonParser jp, DeserializationContext ctxt) General version used when handling needs more advanced features.
JsonDeserializer<Object>	unwrappingDeserializer(NameTransformer unwrapper) Method that will return deserializer instance that is able to handle "unwrapped" value instances If no unwrapped instance can be constructed, will simply return this object as-is.
BeanAsArrayDeserializer	withIgnorableProperties(HashSet<String> ignorableProps)
BeanAsArrayDeserializer	withObjectIdReader(ObjectIdReader oir)

Methods inherited from class com.fasterxml.jackson.databind.deser.BeanDeserializerBase

_convertObjectId, _findSubclassDeserializer, _handleTypedObjectId, _resolvedObjectIdProperty, _resolveInnerClassValuedProperty, _resolveManagedReferenceProperty, _resolveUnwrappedProperty, createContextual, creatorProperties, deserializeFromArray, deserializeFromBoolean, deserializeFromDouble, deserializeFromNumber, deserializeFromObjectId, deserializeFromObjectUsingNonDefault, deserializeFromString, deserializeWithObjectId, deserializeWithType, findBackReference, findConvertingDeserializer, findProperty, findProperty, findProperty, getBeanClass, getKnownPropertyNames, getObjectIdReader, getPropertyCount, getValueInstantiator, getValueType, handledType, handleIgnoredProperty, handlePolymorphic, handleUnknownProperties, handleUnknownProperty, handleUnknownVanilla, hasProperty, hasViews, injectValues, isCachable, properties, replaceProperty, resolve, wrapAndThrow, wrapAndThrow, wrapInstantiationProblem

Methods inherited from class com.fasterxml.jackson.databind.deser.std.StdDeserializer

_hasTextualNull, _isNaN, _isNegInf, _isPosInf, _parseBoolean, _parseBooleanFromNumber, _parseBooleanPrimitive, _parseByte, _parseDate, _parseDouble, _parseDoublePrimitive, _parseFloat, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseShort, _parseShortPrimitive, _parseString, findConvertingContentDeserializer, findDeserializer, getValueClass, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble

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

getDelegatee, getEmptyValue, getNullValue, replaceDelegatee

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_delegate

protected final BeanDeserializerBase _delegate

Deserializer we delegate operations that we can not handle.

_orderedProperties

protected final SettableBeanProperty[] _orderedProperties

Properties in order expected to be found in JSON array.

Constructor Detail

BeanAsArrayDeserializer

public BeanAsArrayDeserializer(BeanDeserializerBase delegate,
                       SettableBeanProperty[] ordered)

Main constructor used both for creating new instances (by BeanDeserializer.asArrayDeserializer()) and for creating copies with different delegate.

Method Detail

unwrappingDeserializer

public JsonDeserializer<Object> unwrappingDeserializer(NameTransformer unwrapper)

Description copied from class: JsonDeserializer

Method that will return deserializer instance that is able to handle "unwrapped" value instances If no unwrapped instance can be constructed, will simply return this object as-is.

Default implementation just returns 'this' indicating that no unwrapped variant exists

Specified by:

unwrappingDeserializer in class BeanDeserializerBase

withObjectIdReader

public BeanAsArrayDeserializer withObjectIdReader(ObjectIdReader oir)

Specified by:

withObjectIdReader in class BeanDeserializerBase

withIgnorableProperties

public BeanAsArrayDeserializer withIgnorableProperties(HashSet<String> ignorableProps)

Specified by:

withIgnorableProperties in class BeanDeserializerBase

asArrayDeserializer

protected BeanDeserializerBase asArrayDeserializer()

Description copied from class: BeanDeserializerBase

Fluent factory for creating a variant that can handle POJO output as a JSON Array. Implementations may ignore this request if no such input is possible.

Specified by:

asArrayDeserializer in class BeanDeserializerBase

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 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.

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:

Deserialized value

Throws:

IOException

JsonProcessingException

deserialize

public Object deserialize(JsonParser jp,
                 DeserializationContext ctxt,
                 Object bean)
                   throws IOException,
                          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 (or supported) by all types (it will not work for immutable types, for obvious reasons): most commonly it is used for Collections and Maps. It may be used both with "updating readers" (for POJOs) and when Collections and Maps use "getter as setter".

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<Object>

Throws:

IOException

JsonProcessingException

deserializeFromObject

public Object deserializeFromObject(JsonParser jp,
                           DeserializationContext ctxt)
                             throws IOException,
                                    JsonProcessingException

Description copied from class: BeanDeserializerBase

General version used when handling needs more advanced features.

Specified by:

deserializeFromObject in class BeanDeserializerBase

Throws:

IOException

JsonProcessingException

_deserializeNonVanilla

protected Object _deserializeNonVanilla(JsonParser jp,
                            DeserializationContext ctxt)
                                 throws IOException,
                                        JsonProcessingException

Alternate deserialization method that has to check many more configuration aspects than the "vanilla" processing.

Throws:

IOException

JsonProcessingException

_deserializeWithCreator

protected Object _deserializeWithCreator(JsonParser jp,
                             DeserializationContext ctxt)
                                  throws IOException,
                                         JsonProcessingException

Throws:

IOException

JsonProcessingException

_deserializeUsingPropertyBased

protected final Object _deserializeUsingPropertyBased(JsonParser jp,
                                    DeserializationContext ctxt)
                                               throws IOException,
                                                      JsonProcessingException

Method called to deserialize bean using "property-based creator": this means that a non-default constructor or factory method is called, and then possibly other setters. The trick is that values for creator method need to be buffered, first; and due to non-guaranteed ordering possibly some other properties as well.

Specified by:

_deserializeUsingPropertyBased in class BeanDeserializerBase

Throws:

IOException

JsonProcessingException

_deserializeFromNonArray

protected Object _deserializeFromNonArray(JsonParser jp,
                              DeserializationContext ctxt)
                                   throws IOException,
                                          JsonProcessingException

Throws:

IOException

JsonProcessingException