Moderne licensed

Properly use declaration-site type variance

Recipe IDorg.openrewrite.staticanalysis.DeclarationSiteTypeVarianceArtifactorg.openrewrite.recipe:rewrite-static-analysis

Currently, Java requires use-site type variance, so if someone has Function<IN, OUT> method parameter, it should rather be Function<? super IN, ? extends OUT>. Unfortunately, it is not easy to notice that ? super and ? extends is missing, so this recipe adds it where that would improve the situation.

Single recipeMSAL

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("org.openrewrite.staticanalysis.DeclarationSiteTypeVariance")
}

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

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-static-analysis:2.44.0")
}

Then run

./gradlew rewriteRun

This recipe has required options, which a build sets in a rewrite.yml recipe that you activate instead.

Usage

You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe org.openrewrite.staticanalysis.DeclarationSiteTypeVariance --recipe-option "variantTypes=java.util.function.Function<IN, OUT>"

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

mod config recipes jar install org.openrewrite.recipe:rewrite-static-analysis:RELEASE

Options

Name	Type	Description
`variantTypes`required	`List`	A list of well-known classes that have in/out type variance. e.g. `java.util.function.Function<IN, OUT>`
`excludedBounds`	`List`	A list of bounds that should not receive explicit variance. Globs supported. e.g. `java.lang.*`
`excludeFinalClasses`	`Boolean`	If true, do not add `? extends` variance to final classes. `? super` variance will be added regardless of finality.

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