Simplify a call chain

org.openrewrite.java.SimplifyMethodChain

Simplify a.b().c() to a.d().

Recipe source

GitHub, Issue Tracker, Maven Central

• groupId: org.openrewrite

• artifactId: rewrite-java

• version: 8.24.0

Options

Type	Name	Description	Example
List	methodPatternChain	A list of method patterns that are called in sequence	['java.util.Map keySet()', 'java.util.Set contains(..)']
String	newMethodName	The method name that will replace the existing name. The new method name target is assumed to have the same arguments as the last method in the chain.	containsKey
Boolean	matchOverrides	Optional. When enabled, find methods that are overrides of the method pattern.	false

Usage

This recipe has required configuration parameters. Recipes with required configuration parameters cannot be activated directly. To activate this recipe you must create a new recipe which fills in the required parameters. In your rewrite.yml create a new recipe with a unique name. For example: com.yourorg.SimplifyMethodChainExample. Here's how you can define and customize such a recipe within your rewrite.yml:

rewrite.yml

---
type: specs.openrewrite.org/v1beta/recipe
name: com.yourorg.SimplifyMethodChainExample
displayName: Simplify a call chain example
recipeList:
  - org.openrewrite.java.SimplifyMethodChain:
      methodPatternChain: ['java.util.Map keySet()', 'java.util.Set contains(..)']
      newMethodName: containsKey
      matchOverrides: false

Now that com.yourorg.SimplifyMethodChainExample has been defined activate it in your build file:

Gradle

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

build.gradle

plugins {
    id("org.openrewrite.rewrite") version("6.12.0")
}

rewrite {
    activeRecipe("com.yourorg.SimplifyMethodChainExample")
}

repositories {
    mavenCentral()
}

2. Run gradle rewriteRun to run the recipe.

Maven

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>5.29.0</version>
        <configuration>
          <activeRecipes>
            <recipe>com.yourorg.SimplifyMethodChainExample</recipe>
          </activeRecipes>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

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

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 SimplifyMethodChainExample

See how this recipe works across multiple open-source repositories

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Contributors

Jonathan Schneider, Tim te Beek, traceyyoshima, Joan Viladrosa, Jonathan Leitschuh