Package com.fasterxml.jackson.databind.deser.impl

Class NullsConstantProvider

  • All Implemented Interfaces:
    NullValueProvider, java.io.Serializable
    public class NullsConstantProvider
extends java.lang.Object
implements NullValueProvider, java.io.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

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static NullsConstantProvider forValue​(java.lang.Object nvl)  
      AccessPattern getNullAccessPattern()
      Accessor that may be used to determine if and when provider must be called to access null replacement value.
      java.lang.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

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

    • 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.

      • 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.

      • getNullValue

        public java.lang.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