Prefer Map.of(..)
org.openrewrite.java.migrate.util.UseMapOfArtifactorg.openrewrite.recipe:rewrite-migrate-javaPrefer Map.of(..) instead of using java.util.Map#put(..) in Java 10 or higher. Two input shapes are recognised:
- Anonymous-class initialization (new HashMap<>() {{ put(k, v); ... }}), which is replaced wholesale with Map.of(k, v, ...) (or Map.ofEntries(...) past ten entries) — immutable result.
- A new HashMap<>() declaration followed by a chain of target.put(k, v) statements, which is collapsed to new HashMap<>(Map.of(..)) (or new HashMap<>(Map.ofEntries(..))) — preserving the mutable HashMap.
Add to your build
~/.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.java.migrate.util.UseMapOf")
}
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-migrate-java:3.45.0")
}
Then run
./gradlew rewriteRunUsage
This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.
mod run . --recipe org.openrewrite.java.migrate.util.UseMapOfIf the recipe isn’t available locally, install it with:
mod config recipes jar install org.openrewrite.recipe:rewrite-migrate-java:RELEASEData 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