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Move annotation to array type

org.openrewrite.java.migrate.jspecify.MoveAnnotationToArrayType

When an annotation like @Nullable is applied to an array type in declaration position, this recipe moves it to the array brackets. For example, @Nullable byte[] becomes byte @Nullable[]. Best used before ChangeType in a migration pipeline, targeting the pre-migration annotation type.

Recipe source​

GitHub: MoveAnnotationToArrayType.java, Issue Tracker, Maven Central

This recipe is available under the Moderne Source Available License.

Options​

TypeNameDescriptionExample
StringannotationTypeThe type of annotation to move to the array type. Should target the pre-migration annotation type to avoid changing the semantics of pre-existing type-use annotations on object arrays.javax.annotation.*ull*

Used by​

This recipe is used as part of the following composite recipes:

Example​

Parameters​
ParameterValue
annotationTypejavax.annotation.*ull*
Before​
import javax.annotation.Nullable;

class Foo {
    @Nullable
    public byte[] bar() {
        return null;
    }
}
After​
import javax.annotation.Nullable;

class Foo {
    public byte @Nullable[] bar() {
        return null;
    }
}

Usage​

This recipe has required configuration parameters. Recipes with required configuration parameters cannot be activated directly (unless you are running them via the Moderne CLI). To activate this recipe you must create a new recipe which fills in the required parameters. In your rewrite.yml create a new recipe with a unique name. For example: com.yourorg.MoveAnnotationToArrayTypeExample. Here's how you can define and customize such a recipe within your rewrite.yml:

rewrite.yml
---
type: specs.openrewrite.org/v1beta/recipe
name: com.yourorg.MoveAnnotationToArrayTypeExample
displayName: Move annotation to array type example
recipeList:
  - org.openrewrite.java.migrate.jspecify.MoveAnnotationToArrayType:
      annotationType: javax.annotation.*ull*

Now that com.yourorg.MoveAnnotationToArrayTypeExample has been defined, activate it and take a dependency on org.openrewrite.recipe:rewrite-migrate-java:3.32.0 in your build file:

  1. Add the following to your build.gradle file:
    build.gradle
    plugins {
        id("org.openrewrite.rewrite") version("latest.release")
    }

    rewrite {
        activeRecipe("com.yourorg.MoveAnnotationToArrayTypeExample")
        setExportDatatables(true)
    }

    repositories {
        mavenCentral()
    }

    dependencies {
        rewrite("org.openrewrite.recipe:rewrite-migrate-java:3.32.0")
    }
  2. Run gradle rewriteRun to run the recipe.

See how this recipe works across multiple open-source repositories​

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Data Tables​

Source files that had results​

org.openrewrite.table.SourcesFileResults

Source files that were modified by the recipe run.

Column NameDescription
Source path before the runThe source path of the file before the run. null when a source file was created during the run.
Source path after the runA recipe may modify the source path. This is the path after the run. null when a source file was deleted during the run.
Parent of the recipe that made changesIn a hierarchical recipe, the parent of the recipe that made a change. Empty if this is the root of a hierarchy or if the recipe is not hierarchical at all.
Recipe that made changesThe specific recipe that made a change.
Estimated time savingAn estimated effort that a developer to fix manually instead of using this recipe, in unit of seconds.
CycleThe recipe cycle in which the change was made.