Interface for providers of
Implemented when an object wants to provide custom value instantiators,
usually to support custom value types with alternate constructors, or
which need specified post-processing after construction but before
Method called to find the
to use for creating
instances of specified type during deserialization.
Note that a default value instantiator is always created first and passed;
if an implementation does not want to modify or replace it, it has to return
passed instance as is (returning null is an error)
config Deserialization configuration in use
beanDesc Additional information about POJO type to be instantiated
defaultInstantiator Instantiator that will be used if no changes are made;
passed to allow custom instances to use annotation-provided information
(note, however, that earlier
may have changed it to
a custom instantiator already)
- Instantiator to use; either
defaultInstantiator that was passed,
or a custom variant; can not be null.
Basic "NOP" implementation that can be used as the base class for custom implementations.
Safer to extend (instead of implementing
) in case later
Jackson versions add new methods in base interface.