Create Java class

org.openrewrite.java.CreateEmptyJavaClass

Create a new, empty Java class.

Recipe source

GitHub, Issue Tracker, Maven Central

Options

Type	Name	Description	Example
String	sourceRoot	The source root of the new class file.	src/main/java
String	packageName	The package of the new class.	org.openrewrite.example
String	modifier	The class modifier. Valid options: public, private, protected, package-private	public
String	className	File path of new file.	ExampleClass
Boolean	overwriteExisting	Optional. If there is an existing file, should it be overwritten.
String	relativePath	Optional. Directory path of new class.	foo/bar

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.CreateEmptyJavaClassExample. 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.CreateEmptyJavaClassExample
displayName: Create Java class example
recipeList:
  - org.openrewrite.java.CreateEmptyJavaClass:
      sourceRoot: src/main/java
      packageName: org.openrewrite.example
      modifier: public
      className: ExampleClass
      relativePath: foo/bar

Now that com.yourorg.CreateEmptyJavaClassExample 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("6.28.1")
}

rewrite {
    activeRecipe("com.yourorg.CreateEmptyJavaClassExample")
    setExportDatatables(true)
}

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>5.46.1</version>
        <configuration>
          <exportDatatables>true</exportDatatables>
          <activeRecipes>
            <recipe>com.yourorg.CreateEmptyJavaClassExample</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 CreateEmptyJavaClass --recipe-option "sourceRoot=src/main/java" --recipe-option "packageName=org.openrewrite.example" --recipe-option "modifier=public" --recipe-option "className=ExampleClass" --recipe-option "relativePath=foo/bar"

If the recipe is not available locally, then you can install it using:

mod config recipes jar install org.openrewrite:rewrite-java:8.41.1

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.

Data Tables

Source files that had results

org.openrewrite.table.SourcesFileResults

Source files that were modified by the recipe run.

Column Name	Description
Source path before the run	The source path of the file before the run. null when a source file was created during the run.
Source path after the run	A recipe may modify the source path. This is the path after the run. null when a source file was deleted during the run.
Parent of the recipe that made changes	In a hierarchical recipe, the parent of the recipe that made a change. Empty if this is the root of a hierarchy or if the recipe is not hierarchical at all.
Recipe that made changes	The specific recipe that made a change.
Estimated time saving	An estimated effort that a developer to fix manually instead of using this recipe, in unit of seconds.
Cycle	The recipe cycle in which the change was made.

Source files that errored on a recipe

org.openrewrite.table.SourcesFileErrors

The details of all errors produced by a recipe run.

Column Name	Description
Source path	The file that failed to parse.
Recipe that made changes	The specific recipe that made a change.
Stack trace	The stack trace of the failure.

Recipe performance

org.openrewrite.table.RecipeRunStats

Statistics used in analyzing the performance of recipes.

Column Name	Description
The recipe	The recipe whose stats are being measured both individually and cumulatively.
Source file count	The number of source files the recipe ran over.
Source file changed count	The number of source files which were changed in the recipe run. Includes files created, deleted, and edited.
Cumulative scanning time	The total time spent across the scanning phase of this recipe.
99th percentile scanning time	99 out of 100 scans completed in this amount of time.
Max scanning time	The max time scanning any one source file.
Cumulative edit time	The total time spent across the editing phase of this recipe.
99th percentile edit time	99 out of 100 edits completed in this amount of time.
Max edit time	The max time editing any one source file.