How are unit tests handled during the porting process?

Because Kotlin requires explicit overrides for inherited test execution, this skill automatically identifies superclass test methods and generates the necessary @Test override boilerplate.

How does this skill handle JDK classes not available in Kotlin Common?

It migrates missing JDK classes to a specialized 'jdkport' package within the project or replaces them with idiomatic Kotlin equivalents, such as mapping Functional Interfaces to Kotlin function types.

Does the ported code maintain the original Lucene structure?

Yes. To ensure easy debugging and comparison, the skill maintains the exact same naming, member ordering, and comment structure as the original Java source.

Can this skill be used for other Java to Kotlin migrations?

While optimized for the Lucene-KMP project, its methodology for handling JDK dependencies and maintaining behavioral parity is applicable to any high-fidelity Java-to-Kotlin migration.

Java to Kotlin KMP Porter

Name: Java to Kotlin KMP Porter
Author: nehemiaharchives

bynehemiaharchives

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Mobile Development

Ports Apache Lucene Java source code into platform-agnostic Kotlin Multiplatform code while maintaining strict implementation parity.

This skill facilitates the systematic migration of the Apache Lucene library from Java to Kotlin Multiplatform (KMP). It provides a structured workflow for mapping Java packages to Kotlin common source sets, handling JDK-specific dependencies through a specialized compatibility layer (jdkport), and ensuring side-by-side logic parity. By enforcing specific coding styles—such as maintaining member order, translating Javadoc to KDoc, and managing Kotlin-specific unit test inheritance—it allows developers to create a highly reliable, multiplatform search library that runs on Android, iOS, Native, and JVM targets.

Key Features

010 GitHub stars

02Step-by-step migration workflow including dependency resolution and diagnostic verification.

03Intelligent substitution of JDK classes with platform-agnostic jdkport equivalents or idiomatic Kotlin.

04Automated mapping of Lucene Java packages to Kotlin commonMain and commonTest structures.

05Strict code style enforcement to ensure logic and behavioral parity for side-by-side comparison.

06Specialized handling for unit test inheritance to ensure Junit-style tests execute correctly in Kotlin.

Use Cases

01Bridging JDK-specific functionality like BitSet and InetAddress into platform-agnostic Kotlin environments.

02Migrating core indexing and search logic from Apache Lucene Java to a KMP-compatible codebase.

03Synchronizing large-scale Java unit test suites with Kotlin Multiplatform testing frameworks.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add nehemiaharchives/bbl-lucene port

For use in Claude.ai and ChatGPT

Download Skill