com.fasterxml.jackson.databind.deser.std

Class ObjectArrayDeserializer

java.lang.Object

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

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

com.fasterxml.jackson.databind.deser.std.ContainerDeserializerBase<Object[]>

com.fasterxml.jackson.databind.deser.std.ObjectArrayDeserializer

All Implemented Interfaces:

ContextualDeserializer, Serializable

public class ObjectArrayDeserializer
extends ContainerDeserializerBase<Object[]>
implements ContextualDeserializer

Basic serializer that can serialize non-primitive arrays.

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 ArrayType	_arrayType Full generic type of the array being deserialized
protected Class<?>	_elementClass Type of contained elements: needed for constructing actual result array
protected JsonDeserializer<Object>	_elementDeserializer Element deserializer
protected TypeDeserializer	_elementTypeDeserializer If element instances have polymorphic type information, this is the type deserializer that can handle it
protected boolean	_untyped Flag that indicates whether the component type is Object or not.
protected Boolean	_unwrapSingle Specific override for this instance (from proper, or global per-type overrides) to indicate whether single value may be taken to mean an unwrapped one-element array or not.

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

_valueClass, F_MASK_INT_COERCIONS

Constructor Summary

Constructors

Modifier	Constructor and Description
	ObjectArrayDeserializer(ArrayType arrayType, JsonDeserializer<Object> elemDeser, TypeDeserializer elemTypeDeser)
protected	ObjectArrayDeserializer(ObjectArrayDeserializer base, JsonDeserializer<Object> elemDeser, TypeDeserializer elemTypeDeser, Boolean unwrapSingle)

Method Summary

Methods

Modifier and Type	Method and Description
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.
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.
protected Byte[]	deserializeFromBase64(JsonParser p, DeserializationContext ctxt)
Object[]	deserializeWithType(JsonParser p, 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 Object[]	handleNonArray(JsonParser p, DeserializationContext ctxt)
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).
ObjectArrayDeserializer	withDeserializer(TypeDeserializer elemTypeDeser, JsonDeserializer<?> elemDeser) Overridable fluent-factory method used to create contextual instances
ObjectArrayDeserializer	withResolved(TypeDeserializer elemTypeDeser, JsonDeserializer<?> elemDeser, Boolean unwrapSingle)

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

findBackReference, wrapAndThrow

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

_coerceIntegral, _deserializeFromEmpty, _failDoubleToIntCoercion, _hasTextualNull, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _parseBoolean, _parseBooleanFromOther, _parseBooleanPrimitive, _parseByte, _parseDate, _parseDouble, _parseDoublePrimitive, _parseFloat, _parseFloatPrimitive, _parseInteger, _parseIntPrimitive, _parseLong, _parseLongPrimitive, _parseShort, _parseShortPrimitive, _parseString, findConvertingContentDeserializer, findDeserializer, findFormatFeature, findFormatOverrides, getValueClass, getValueType, handledType, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble

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

deserialize, getDelegatee, getEmptyValue, getEmptyValue, getKnownPropertyNames, getNullValue, getNullValue, getObjectIdReader, replaceDelegatee, unwrappingDeserializer

Methods inherited from class java.lang.Object

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

Field Detail

_arrayType

protected final ArrayType _arrayType

Full generic type of the array being deserialized

_untyped

protected final boolean _untyped

Flag that indicates whether the component type is Object or not. Used for minor optimization when constructing result.

_elementClass

protected final Class<?> _elementClass

Type of contained elements: needed for constructing actual result array

_elementDeserializer

protected JsonDeserializer<Object> _elementDeserializer

Element deserializer

_elementTypeDeserializer

protected final TypeDeserializer _elementTypeDeserializer

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

_unwrapSingle

protected final Boolean _unwrapSingle

Specific override for this instance (from proper, or global per-type overrides) to indicate whether single value may be taken to mean an unwrapped one-element array or not. If null, left to global defaults.

Since:

2.7

Constructor Detail

ObjectArrayDeserializer

public ObjectArrayDeserializer(ArrayType arrayType,
                       JsonDeserializer<Object> elemDeser,
                       TypeDeserializer elemTypeDeser)

ObjectArrayDeserializer

protected ObjectArrayDeserializer(ObjectArrayDeserializer base,
                       JsonDeserializer<Object> elemDeser,
                       TypeDeserializer elemTypeDeser,
                       Boolean unwrapSingle)

Method Detail

withDeserializer

public ObjectArrayDeserializer withDeserializer(TypeDeserializer elemTypeDeser,
                                       JsonDeserializer<?> elemDeser)

Overridable fluent-factory method used to create contextual instances

withResolved

public ObjectArrayDeserializer withResolved(TypeDeserializer elemTypeDeser,
                                   JsonDeserializer<?> elemDeser,
                                   Boolean unwrapSingle)

Since:

2.7

createContextual

public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
                                   BeanProperty property)
                                     throws JsonMappingException

Description copied from interface: ContextualDeserializer

Method called to see if a different (or differently configured) deserializer is needed to deserialize values of specified property. Note that instance that this method is called on is typically shared one and as a result method should NOT modify this instance but rather construct and return a new instance. This instance should only be returned as-is, in case it is already suitable for use.

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

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[]>

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<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<Object[]>

deserialize

public Object[] deserialize(JsonParser p,
                   DeserializationContext ctxt)
                     throws IOException

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:

p - Parsed used for reading JSON content

ctxt - Context that can be used to access information about this deserialization activity.

Returns:

Deserialized value

Throws:

IOException

deserializeWithType

public Object[] deserializeWithType(JsonParser p,
                           DeserializationContext ctxt,
                           TypeDeserializer typeDeserializer)
                             throws IOException

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<Object[]>

typeDeserializer - Deserializer to use for handling type information

Throws:

IOException

deserializeFromBase64

protected Byte[] deserializeFromBase64(JsonParser p,
                           DeserializationContext ctxt)
                                throws IOException

Throws:

IOException

handleNonArray

protected Object[] handleNonArray(JsonParser p,
                      DeserializationContext ctxt)
                           throws IOException

Throws:

IOException