Moderne licensed

Remove unreachable `catch` alternatives shadowed by earlier `catch` clauses

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

When an earlier catch clause already covers a type, any later catch (including a multi-catch alternative) for the same type or a subtype is unreachable and is a Java compile error. This commonly appears after type-substitution migrations (for example, renaming an exception so that two catch clauses end up overlapping). This recipe drops the unreachable alternatives from later multi-catches, collapses a multi-catch to a regular catch when only one alternative remains, and removes the entire catch clause when all of its declared types are already covered.

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.RemoveUnreachableMultiCatchAlternative")
}

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

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.staticanalysis.RemoveUnreachableMultiCatchAlternative

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

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