Find manual null-check idioms
Recipe ID
org.openrewrite.kotlin.idiom.FindNullCheckIdioms$KtRecipeArtifact
io.moderne.recipe:recipes-kotlinif (x != null) x.foo() / if (x == null) return … / if (x == null) throw … patterns where Kotlin's ?., ?: return, and ?: throw operators express the same intent in expression position.
Usage
This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.
mod run . --recipe org.openrewrite.kotlin.idiom.FindNullCheckIdioms$KtRecipeIf the recipe isn’t available locally, install it with:
mod config recipes jar install io.moderne.recipe:recipes-kotlin:0.2.0Definition
This recipe runs the following recipes in order.
- Find
if (x != null) x.foo()that could use?.org.openrewrite.kotlin.idiom.FindIfNotNullThenCall$KtRecipe - Find
if (x != null) y = x.foo()patternsorg.openrewrite.kotlin.idiom.FindIfNotNullAssign$KtRecipe - Find
if (x == null) return ...early-exit patternsorg.openrewrite.kotlin.idiom.FindIfNullReturn$KtRecipe - Find
if (x == null) throw ...patternsorg.openrewrite.kotlin.idiom.FindIfNullThrow$KtRecipe - Find
if (cond) value else nullpatternsorg.openrewrite.kotlin.idiom.FindIfElseNullDefault$KtRecipe
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