Moderne licensed

Remove catch for a checked exception if the try block does not throw that exception

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

A refactoring operation may result in a checked exception that is no longer thrown from a try block. This recipe will find and remove unnecessary catch blocks.

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.UnnecessaryCatch")
}

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.UnnecessaryCatch

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
`includeJavaLangException`	`boolean`	Whether to include `java.lang.Exception` in the list of checked exceptions to remove. Unlike other checked exceptions, `java.lang.Exception` is also the superclass of unchecked exceptions. So removing `catch(Exception e)` may result in changed runtime behavior in the presence of unchecked exceptions. Default `false`
`includeJavaLangThrowable`	`boolean`	Whether to include `java.lang.Throwable` in the list of exceptions to remove. Unlike other checked exceptions, `java.lang.Throwable` is also the superclass of unchecked exceptions. So removing `catch(Throwable e)` may result in changed runtime behavior in the presence of unchecked exceptions. Default `false`

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