JsonSetter (jackson-annotations 2.9.0.pr1)

```
@Target(value={ANNOTATION_TYPE,FIELD,METHOD,PARAMETER})
@Retention(value=RUNTIME)
public @interface JsonSetter
```
Annotation that can be used to define a non-static, single-argument method to be used as a "setter" for a logical property as an alternative to recommended JsonProperty annotation; or (as of 2.9 and later), specify additional aspects of the assigning property a value during serialization.

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element and Description
`JsonSetter.Nulls`	`contentNulls` Specifies action to take when input to match into content value (of a `Collection`, `Map`, array, or referential value) contains explicit `null` value (if format has one) to bind.
`JsonSetter.Nulls`	`nulls` Specifies action to take when input contains explicit `null` value (if format has one).
`String`	`value` Optional default argument that defines logical property this method is used to modify ("set"); this is the property name used in JSON content.

- Element Detail
  - value
```
public abstract String value
```
    Optional default argument that defines logical property this method is used to modify ("set"); this is the property name used in JSON content.
    
    Default:
    
    ""
  - nulls
```
public abstract JsonSetter.Nulls nulls
```
    Specifies action to take when input contains explicit `null` value (if format has one). Default action, in absence of any explicit configuration, is usually JsonSetter.Nulls.SET, meaning that the `null` is set as value using setter.
    NOTE: is not usually used in case property value is missing, unless data format specifies that there is defaulting which would result in an explicit null assignment.
    
    Default:
    
    com.fasterxml.jackson.annotation.JsonSetter.Nulls.DEFAULT
  - contentNulls
```
public abstract JsonSetter.Nulls contentNulls
```
    Specifies action to take when input to match into content value (of a Collection, Map, array, or referential value) contains explicit `null` value (if format has one) to bind. Default action, in absence of any explicit configuration, is usually JsonSetter.Nulls.SET, meaning that the `null` is included as usual.
    
    Default:
    
    com.fasterxml.jackson.annotation.JsonSetter.Nulls.DEFAULT

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