Remove a redundant @NonNull annotation under @NullMarked
io.moderne.nullability.RemoveRedundantNonNullAnnotationio.moderne.recipe:rewrite-nullabilityRemoves an explicit @NonNull / @Nonnull annotation that is redundant inside a @NullMarked scope, where non-null is already the default. In JSpecify-normalized code an unannotated declaration in an annotated scope is already non-null, so the annotation merely restates the default; removing it leaves the declared nullability — and therefore runtime behavior — unchanged. Conservative: it acts only on a declaration whose enclosing type is in the fix scope (@NullMarked / AnnotatedPackages), removing the annotation from either the leading (declaration) position or the TYPE_USE position; it never touches @Nullable, @CheckForNull, or @MonotonicNonNull. The annotation import is dropped when this was its last use. Annotation-only and idempotent; only Java sources are modified.
Usage
This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.
mod run . --recipe io.moderne.nullability.RemoveRedundantNonNullAnnotationIf the recipe isn’t available locally, install it with:
mod config recipes jar install io.moderne.recipe:rewrite-nullability:0.3.1Options
| Name | Type | Description |
|---|---|---|
annotatedPackages | String | Comma-separated package prefixes to limit the fix to (matching NullAway's AnnotatedPackages option). When unset, the recipe fixes all packages.e.g. com.example |
Data tables
Structured output this recipe can produce.
- Null-safety fixes by rungEach residual null-safety fix applied, tagged with the precedence rung that produced it, so the share bottoming out at a last-resort `requireNonNull` assertion can be tracked.
io.moderne.nullability.table.NullFixes - Declined null-safety fixes needing reviewEach site the recipe declined to auto-fix because the fix is a design decision (the value is explicitly `null` on some path, so the slot likely should be `@Nullable`), for human triage.
io.moderne.nullability.table.DeclinedNullFixes - Source files that had resultsSource files that were modified by the recipe run.
org.openrewrite.table.SourcesFileResults - Source files that had search resultsSearch results that were found during the recipe run.
org.openrewrite.table.SearchResults - Source files that errored on a recipeThe details of all errors produced by a recipe run.
org.openrewrite.table.SourcesFileErrors - Recipe performanceStatistics used in analyzing the performance of recipes.
org.openrewrite.table.RecipeRunStats