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Remove a redundant declaration-position @Nullable on a method return

Recipe IDio.moderne.nullability.RemoveRedundantNullableOnMethodReturn
Artifactio.moderne.recipe:rewrite-nullability

When a method return type already carries a TYPE_USE @Nullable (for example <T> @Nullable T or pkg.@Nullable Type), a second @Nullable in the leading (declaration) position or before the type parameters is redundant, and on generic, qualified, or nested return types it is rejected by javac. This removes that duplicate so the JSpecify annotation survives in the single, valid TYPE_USE position. It only ever removes an annotation that is provably duplicated by one on the return type itself, so it never changes a method's nullability.

Single recipeProprietary

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.RemoveRedundantNullableOnMethodReturn

If the recipe isn’t available locally, install it with:

mod config recipes jar install io.moderne.recipe:rewrite-nullability:0.3.1

Data tables

Structured output this recipe can produce.

  • 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