com.fasterxml.jackson.databind.deser.std

Class ContainerDeserializerBase<T>

java.lang.Object

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

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

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

All Implemented Interfaces:

NullValueProvider, ValueInstantiator.Gettable, Serializable

Direct Known Subclasses:

CollectionDeserializer, EnumMapDeserializer, MapDeserializer, MapEntryDeserializer, ObjectArrayDeserializer, StringCollectionDeserializer

public abstract class ContainerDeserializerBase<T>
extends StdDeserializer<T>
implements ValueInstantiator.Gettable

Intermediate base deserializer class that adds more shared accessor so that other classes can access information about contained (value) types

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 JavaType	_containerType
protected NullValueProvider	_nullProvider Handler we need for dealing with nulls.
protected boolean	_skipNullValues Marker flag set if the _nullProvider indicates that all null content values should be skipped (instead of being possibly converted).
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, _valueType, F_MASK_ACCEPT_ARRAYS, F_MASK_INT_COERCIONS

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ContainerDeserializerBase(ContainerDeserializerBase<?> base)
protected	ContainerDeserializerBase(ContainerDeserializerBase<?> base, NullValueProvider nuller, Boolean unwrapSingle)
protected	ContainerDeserializerBase(JavaType selfType)
protected	ContainerDeserializerBase(JavaType selfType, NullValueProvider nuller, Boolean unwrapSingle)

Method Summary

Modifier and Type	Method and Description
SettableBeanProperty	findBackReference(String refName) Method needed by BeanDeserializerFactory to properly link managed- and back-reference pairs.
abstract 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.
AccessPattern	getEmptyAccessPattern() This method may be called in conjunction with calls to JsonDeserializer.getEmptyValue(DeserializationContext), to check whether it needs to be called just once (static values), or each time empty value is needed.
Object	getEmptyValue(DeserializationContext ctxt) Method called to determine value to be used for "empty" values (most commonly when deserializing from empty JSON Strings).
ValueInstantiator	getValueInstantiator()
JavaType	getValueType() Exact structured type this deserializer handles, if known.
Boolean	supportsUpdate(DeserializationConfig config) Introspection method that may be called to see whether deserializer supports update of an existing value (aka "merging") or not.
protected <BOGUS> BOGUS	wrapAndThrow(Throwable t, Object ref, String key) Helper method called by various Map(-like) deserializers.

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

_byteOverflow, _coercedTypeDesc, _coerceEmptyString, _coerceIntegral, _coerceNullToken, _coerceTextualNull, _deserializeFromArray, _deserializeFromEmpty, _deserializeWrappedValue, _failDoubleToIntCoercion, _findNullProvider, _hasTextualNull, _intOverflow, _isEmptyOrTextualNull, _isIntNumber, _isNaN, _isNegInf, _isPosInf, _neitherNull, _nonNullNumber, _parseBooleanFromInt, _parseBooleanPrimitive, _parseBytePrimitive, _parseDate, _parseDate, _parseDateFromArray, _parseDoublePrimitive, _parseDoublePrimitive, _parseFloatPrimitive, _parseFloatPrimitive, _parseIntPrimitive, _parseIntPrimitive, _parseLongPrimitive, _parseLongPrimitive, _parseShortPrimitive, _parseString, _reportFailedNullCoerce, _shortOverflow, _verifyEndArrayForSingle, _verifyNullForPrimitive, _verifyNullForPrimitiveCoercion, _verifyNullForScalarCoercion, _verifyNumberForScalarCoercion, _verifyStringForScalarCoercion, deserializeWithType, findContentNullProvider, findContentNullStyle, findConvertingContentDeserializer, findDeserializer, findFormatFeature, findFormatOverrides, findValueNullProvider, getValueClass, getValueType, handledType, handleMissingEndArrayForSingle, handleUnknownProperty, isDefaultDeserializer, isDefaultKeyDeserializer, parseDouble

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

deserialize, deserialize, deserializeWithType, getDelegatee, getEmptyValue, getKnownPropertyNames, getNullAccessPattern, getNullValue, getNullValue, getObjectIdReader, isCachable, replaceDelegatee, unwrappingDeserializer

Methods inherited from class java.lang.Object

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

Field Detail

_containerType

protected final JavaType _containerType

_nullProvider

protected final NullValueProvider _nullProvider

Handler we need for dealing with nulls.

Since:

2.9

_skipNullValues

protected final boolean _skipNullValues

Marker flag set if the _nullProvider indicates that all null content values should be skipped (instead of being possibly converted).

Since:

2.9

_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:

2.9 (demoted from sub-classes where added in 2.7)

Constructor Detail

ContainerDeserializerBase

protected ContainerDeserializerBase(JavaType selfType,
                                    NullValueProvider nuller,
                                    Boolean unwrapSingle)

ContainerDeserializerBase

protected ContainerDeserializerBase(JavaType selfType)

ContainerDeserializerBase

protected ContainerDeserializerBase(ContainerDeserializerBase<?> base)

Since:

2.9

ContainerDeserializerBase

protected ContainerDeserializerBase(ContainerDeserializerBase<?> base,
                                    NullValueProvider nuller,
                                    Boolean unwrapSingle)

Since:

2.9

Method Detail

getValueType

public JavaType getValueType()

Description copied from class: StdDeserializer

Exact structured type this deserializer handles, if known.

Overrides:

getValueType in class StdDeserializer<T>

supportsUpdate

public Boolean supportsUpdate(DeserializationConfig config)

Description copied from class: JsonDeserializer

Introspection method that may be called to see whether deserializer supports update of an existing value (aka "merging") or not. Return value should either be Boolean.FALSE if update is not supported at all (immutable values); Boolean.TRUE if update should usually work (regular POJOs, for example), or null if this is either not known, or may sometimes work.

Information gathered is typically used to either prevent merging update for property (either by skipping, if based on global defaults; or by exception during deserialization construction if explicit attempt made) if Boolean.FALSE returned, or inclusion if Boolean.TRUE is specified. If "unknown" case (null returned) behavior is to exclude property if global defaults used; or to allow if explicit per-type or property merging is defined.

Default implementation returns null to allow explicit per-type or per-property attempts.

Overrides:

supportsUpdate in class JsonDeserializer<T>

findBackReference

public SettableBeanProperty findBackReference(String refName)

Description copied from class: JsonDeserializer

Method needed by BeanDeserializerFactory to properly link managed- and back-reference pairs.

Overrides:

findBackReference in class JsonDeserializer<T>

getContentType

public JavaType getContentType()

Accessor for declared type of contained value elements; either exact type, or one of its supertypes.

getContentDeserializer

public abstract JsonDeserializer<Object> getContentDeserializer()

Accesor for deserializer use for deserializing content values.

getValueInstantiator

public ValueInstantiator getValueInstantiator()

Specified by:

getValueInstantiator in interface ValueInstantiator.Gettable

Since:

2.9

getEmptyAccessPattern

public AccessPattern getEmptyAccessPattern()

Description copied from class: JsonDeserializer

This method may be called in conjunction with calls to JsonDeserializer.getEmptyValue(DeserializationContext), to check whether it needs to be called just once (static values), or each time empty value is needed.

Overrides:

getEmptyAccessPattern in class JsonDeserializer<T>

getEmptyValue

public Object getEmptyValue(DeserializationContext ctxt)
                     throws JsonMappingException

Description copied from class: JsonDeserializer

Method called to determine value to be used for "empty" values (most commonly when deserializing from empty JSON Strings). Usually this is same as JsonDeserializer.getNullValue(com.fasterxml.jackson.databind.DeserializationContext) (which in turn is usually simply Java null), but it can be overridden for specific types. Or, if type should never be converted from empty String, method can also throw an exception.

This method may be called once, or multiple times, depending on what JsonDeserializer.getEmptyAccessPattern() returns.

Default implementation simply calls JsonDeserializer.getNullValue(com.fasterxml.jackson.databind.DeserializationContext) and returns value.

Overrides:

getEmptyValue in class JsonDeserializer<T>

Throws:

JsonMappingException

wrapAndThrow

protected <BOGUS> BOGUS wrapAndThrow(Throwable t,
                                     Object ref,
                                     String key)
                              throws IOException

Helper method called by various Map(-like) deserializers.

Throws:

IOException