org.eclipse.microprofile.graphql

Annotation Type NonNull

@Retention(value=RUNTIME)
 @Target(value={FIELD,METHOD})
 @Documented
public @interface NonNull

Specifies that the GraphQL type and/or input type represented by the Java field this annotation is applied to must be marked as non-null in the schema.

For example, a user might annotate a class' property as such:

  @Type(name = "Starship", description = "A starship in StarWars")
  @InputType(name = "StarshipInput", description = "Input type for a starship")
 public class Starship {
     private String id;
      @NonNull
     private String name;
     private float length;

     // getters/setters...
 }
 

Schema generation of this would result in a stanza such as:

 # A starship from Starwars
 type Starship {
   id: String
   name: String!
   length: Float!
 }

 # Input type for a starship
 input StarshipInput {
   # uuid of a new Starship
   id: String
   name: String!
   length: Float!
 }
 

Note that all primitive fields/properties are automatically considered non-null unless they are also annotated with a DefaultValue annotation.