Moderne licensed

Add `@Nullable` to a mismatched generic type argument

Recipe IDio.moderne.nullability.AddNullableToMismatchedTypeArgumentArtifactio.moderne.recipe:rewrite-nullability

Adds @Nullable to a nested generic type argument when a variable initializer or return has a wider nested element nullness than its target (such as a List<@Nullable String> assigned into a List<String>) by adding @Nullable to the target's nested type argument. A generic container is invariant in its element nullness, so the mismatch is a NullAway error. Gated on JSpecify @NullMarked scope and applied only where the fix is local to a declaration this recipe owns (a variable initializer or a method return type); raw types, unresolved bases, arity mismatches, and the diamond new B<>() target are left unchanged. Idempotent.

Single recipeProprietary

Add to your build

Get a download tokenThis recipe is Moderne licensed, so the token must belong to a Moderne customer. It replaces YOUR_DOWNLOAD_TOKEN below.

~/.gradle/gradle.properties

codeGenomeUsername=you@example.com
codeGenomeToken=YOUR_DOWNLOAD_TOKEN

build.gradle.kts

plugins {
    id("org.openrewrite.rewrite") version("latest.release")
}

rewrite {
    activeRecipe("io.moderne.nullability.AddNullableToMismatchedTypeArgument")
}

repositories {
    mavenCentral()
    maven {
        url = uri("https://artifacts.codegenomeproject.org/maven")
        credentials {
            username = providers.gradleProperty("codeGenomeUsername").get()
            password = providers.gradleProperty("codeGenomeToken").get()
        }
    }
}

dependencies {
    rewrite("io.moderne.recipe:rewrite-nullability:0.6.0")
}

Then run

./gradlew rewriteRun

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.AddNullableToMismatchedTypeArgument

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

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

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