In order to test whether a stream has any element, simply try to find one

tech.picnic.errorprone.refasterrules.LongStreamRulesRecipes$LongStreamIsNotEmptyRecipe

_Recipe created for the following Refaster template:

static final class LongStreamIsNotEmpty {
    
    @BeforeTemplate
    boolean before(LongStream stream) {
        return Refaster.anyOf(stream.count() != 0, stream.count() > 0, stream.count() >= 1, stream.findFirst().isPresent());
    }
    
    @AfterTemplate
    boolean after(LongStream stream) {
        return stream.findAny().isPresent();
    }
}

._

Recipe source

GitHub, Issue Tracker, Maven Central

• groupId: org.openrewrite.recipe

• artifactId: rewrite-third-party

• version: 0.5.1

Usage

This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-third-party:0.5.1 in your build file or by running a shell command (in which case no build changes are needed):

Gradle

1. Add the following to your build.gradle file:

build.gradle

plugins {
    id("org.openrewrite.rewrite") version("6.16.1")
}

rewrite {
    activeRecipe("tech.picnic.errorprone.refasterrules.LongStreamRulesRecipes$LongStreamIsNotEmptyRecipe")
}

repositories {
    mavenCentral()
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-third-party:0.5.1")
}

2. Run gradle rewriteRun to run the recipe.

Gradle init script

1. Create a file named init.gradle in the root of your project.

init.gradle

initscript {
    repositories {
        maven { url "https://plugins.gradle.org/m2" }
    }
    dependencies { classpath("org.openrewrite:plugin:6.16.1") }
}
rootProject {
    plugins.apply(org.openrewrite.gradle.RewritePlugin)
    dependencies {
        rewrite("org.openrewrite.recipe:rewrite-third-party:0.5.1")
    }
    rewrite {
        activeRecipe("tech.picnic.errorprone.refasterrules.LongStreamRulesRecipes$LongStreamIsNotEmptyRecipe")
    }
    afterEvaluate {
        if (repositories.isEmpty()) {
            repositories {
                mavenCentral()
            }
        }
    }
}

2. Run gradle --init-script init.gradle rewriteRun to run the recipe.

Maven POM

1. Add the following to your pom.xml file:

pom.xml

<project>
  <build>
    <plugins>
      <plugin>
        <groupId>org.openrewrite.maven</groupId>
        <artifactId>rewrite-maven-plugin</artifactId>
        <version>5.34.0</version>
        <configuration>
          
          <activeRecipes>
            <recipe>tech.picnic.errorprone.refasterrules.LongStreamRulesRecipes$LongStreamIsNotEmptyRecipe</recipe>
          </activeRecipes>
        </configuration>
        <dependencies>
          <dependency>
            <groupId>org.openrewrite.recipe</groupId>
            <artifactId>rewrite-third-party</artifactId>
            <version>0.5.1</version>
          </dependency>
        </dependencies>
      </plugin>
    </plugins>
  </build>
</project>

2. Run mvn rewrite:run to run the recipe.

Maven Command Line

You will need to have Maven installed on your machine before you can run the following command.

shell

mvn -U org.openrewrite.maven:rewrite-maven-plugin:run -Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-third-party:RELEASE -Drewrite.activeRecipes=tech.picnic.errorprone.refasterrules.LongStreamRulesRecipes$LongStreamIsNotEmptyRecipe 

Moderne CLI

You will need to have configured the Moderne CLI on your machine before you can run the following command.

shell

mod run . --recipe LongStreamRulesRecipes$LongStreamIsNotEmptyRecipe

See how this recipe works across multiple open-source repositories

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Please contact Moderne for more information about safely running the recipes on your own codebase in a private SaaS.