Package org.springframework.lang

# Annotation Interface NonNullApi

@Target(PACKAGE) @Retention(RUNTIME) @Documented @Nonnull @TypeQualifierDefault({METHOD,PARAMETER}) public @interface NonNullApi
A common Spring annotation to declare that parameters and return values are to be considered as non-nullable by default for a given package.

Leverages JSR-305 meta-annotations to indicate nullability in Java to common tools with JSR-305 support and used by Kotlin to infer nullability of Spring API.

Should be used at the package level in association with `Nullable` annotations at the parameter and return value level.

Since:
  5.0
Author:
  Sebastien Deleuze, Juergen Hoeller
See Also:
  - `NonNullFields`
  - `Nullable`
  - `NonNull`