javax.json.bind.annotation.JsonbNillable Maven / Gradle / Ivy
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package javax.json.bind.annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.PACKAGE;
import static java.lang.annotation.ElementType.TYPE;
/**
* Specifies how the annotated field will be serialized into JSON in case the value of given field is null.
*
* There are two possible values which can be specified. In case of true, given field will be serialized as
* key/value pair with value null. In case of false, given field will not be serialized.
*
* For java Optionals, an empty optional is treated same as null for other field types.
*
* If the annotation is specified on type, all accessors (field or a JavaBean property) of the given type are
* handled as if they have been annotated with {@code @JsonNillable}. If the annotation is specified on package,
* all types within that package are handled as if they have been annotated with {@code @JsonNillable}.
*
* Serialization of given field (or a JavaBean property) is affected only if the value of given field
* (or a JavaBean property) is null.
*
* Usage
* The {@code @JsonbNillable} annotation can be used with the following program elements:
*
* - a JavaBean property
* - package
*
*
* @since JSON Binding 1.0
*/
@JsonbAnnotation
@Retention(RetentionPolicy.RUNTIME)
@Target({ANNOTATION_TYPE, TYPE, PACKAGE})
public @interface JsonbNillable {
/**
* True if field with null value should be serialized as key/value pair into JSON with null value.
*/
boolean value() default true;
}