AddMissingMethodImplementation adds method implementations to Interfaces

[darylrobbins]

What version of OpenRewrite are you using?

I am using

• Gradle plugin v6.11.2
• rewrite-bom v2.9.0
• rewrite-migrate-java

How are you running OpenRewrite?

I have created a minimal test case to reproduce the issue here: https://github.com/darylrobbins/rewrite-test/tree/missingimp

I am using the Gradle plugin, and my project is a single module project.

plugins {
    id("java")
    id("org.openrewrite.rewrite") version "6.11.2"
}

group = "org.sample.rewrite"
version = "1.0-SNAPSHOT"

repositories {
    mavenCentral()
}

dependencies {
    testImplementation(platform("org.junit:junit-bom:5.10.0"))
    testImplementation("org.junit.jupiter:junit-jupiter")
    rewrite(platform("org.openrewrite.recipe:rewrite-recipe-bom:2.9.0"))
    rewrite("org.openrewrite.recipe:rewrite-migrate-java")
}

dependencies {

}

rewrite {
    activeRecipe(
        "org.sample.rewrite.AddMissingMethodImplementation"
    )
}

tasks.test {
    useJUnitPlatform()
}

What is the smallest, simplest way to reproduce the problem?

Here is the recipe:

type: specs.openrewrite.org/v1beta/recipe
name: org.sample.rewrite.AddMissingMethodImplementation
displayName: Adds missing JDBC interface methods.
description: Add method implementations stubs to classes that implement JDBC interfaces.
recipeList:
  - org.openrewrite.java.migrate.AddMissingMethodImplementation:
      fullyQualifiedClassName: javax.sql.CommonDataSource
      methodPattern: "*..* getParentLogger()"
      methodTemplateString: "public java.util.logging.Logger getParentLogger() { \n\t// TODO Auto-generated method stub\n return null; }"

Here is a Java interface in the codebase:

public interface MyDatasourceInterface extends DataSource {
}

What did you expect to see?

public interface MyDatasourceInterface extends DataSource {
}

What did you see instead?

public interface MyDatasourceInterface extends DataSource {
    public java.util.logging.Logger getParentLogger() {
        // TODO Auto-generated method stub
        return null;
    }
}