com.fasterxml.jackson.databind.deser.impl

Class NullsConstantProvider

java.lang.Object

com.fasterxml.jackson.databind.deser.impl.NullsConstantProvider

All Implemented Interfaces:

NullValueProvider, Serializable

public class NullsConstantProvider
extends Object
implements NullValueProvider, Serializable

Simple NullValueProvider that will simply return given constant value when a null is encountered; or, with a specially constructed instance (see skipper(), indicate the need for special behavior of skipping property altogether (not setting as anything OR throwing exception).

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected AccessPattern	_access
protected Object	_nullValue

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NullsConstantProvider(Object nvl)

Method Summary

Modifier and Type	Method and Description
static NullsConstantProvider	forValue(Object nvl)
AccessPattern	getNullAccessPattern() Accessor that may be used to determine if and when provider must be called to access null replacement value.
Object	getNullValue(DeserializationContext ctxt) Method called to possibly convert incoming `null` token (read via underlying streaming input source) into other value of type accessor supports.
static boolean	isNuller(NullValueProvider p) Utility method that can be used to check if given null value provider is "nuller", no-operation provider that will always simply return Java `null` for any and all input `null`s.
static boolean	isSkipper(NullValueProvider p) Utility method that can be used to check if given null value provider is "skipper", marker provider that means that all input `null`s should be skipped (ignored), instead of converted
static NullsConstantProvider	nuller()
static NullsConstantProvider	skipper() Static accessor for a stateless instance used as marker, to indicate that all input `null` values should be skipped (ignored), so that no corresponding property value is set (with POJOs), and no content values (array/Collection elements, Map entries) are added.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.fasterxml.jackson.databind.deser.NullValueProvider

getAbsentValue

Field Detail

_nullValue

protected final Object _nullValue

_access

protected final AccessPattern _access

Constructor Detail

NullsConstantProvider

protected NullsConstantProvider(Object nvl)

Method Detail

skipper

public static NullsConstantProvider skipper()

Static accessor for a stateless instance used as marker, to indicate that all input `null` values should be skipped (ignored), so that no corresponding property value is set (with POJOs), and no content values (array/Collection elements, Map entries) are added.

nuller

public static NullsConstantProvider nuller()

forValue

public static NullsConstantProvider forValue(Object nvl)

isSkipper

public static boolean isSkipper(NullValueProvider p)

Utility method that can be used to check if given null value provider is "skipper", marker provider that means that all input `null`s should be skipped (ignored), instead of converted

isNuller

public static boolean isNuller(NullValueProvider p)

Utility method that can be used to check if given null value provider is "nuller", no-operation provider that will always simply return Java `null` for any and all input `null`s.

getNullAccessPattern

public AccessPattern getNullAccessPattern()

Description copied from interface: NullValueProvider

Accessor that may be used to determine if and when provider must be called to access null replacement value.

Specified by:

getNullAccessPattern in interface NullValueProvider

getNullValue

public Object getNullValue(DeserializationContext ctxt)

Description copied from interface: NullValueProvider

Method called to possibly convert incoming `null` token (read via underlying streaming input source) into other value of type accessor supports. May return `null`, or value compatible with type binding.

NOTE: if NullValueProvider.getNullAccessPattern() returns `ALWAYS_NULL` or `CONSTANT`, this method WILL NOT use provided `ctxt` and it may thus be passed as `null`.

Specified by:

getNullValue in interface NullValueProvider