jda

An adapter API for JetBrains' Java-Decompiler version of FernFlower, written in Kotlin. On top of all the features availabe in stock FernFlower, jda provides support for parallel decompilation through a thread-safe wrapper.

Building

The artifact cannot legally be distributed, therefore you must build the application locally in order to use it. To build the application and produce a system-wide copy that can be used in other projects, run the following commands:

git clone https://github.com/mcdh/jda.git
cd jda/
./gradlew build

The artifact will automatically be published to your local maven cache for further use in other projects.

jda as a Dependency

To include jda in your project simply base your gradle configuration on the following:

repositories {
 mavenLocal()
 mavenCentral()
}

dependencies {
 compile 'org.mcdh:jda:0.0.1'
}

Usage

There is a single entry point in org.mcdh.jda.JavaDecompileProxy.

Kotlin

import org.mcdh.jda.JavaDecompileProxy

fun main(args: Array<String>) {
 val options = mutableMapOf<String, String>()
 //Example option: `-dgs=1` forces Fernflower to decompile generic structures
 options["dgs"] = "1"
 val decompiler = JavaDecompileProxy(options)
 val decompiled = decompiler.decompile("/path/to/clazz.class")
}

Java

import org.mcdh.jda.JavaDecompileProxyKt;

class Example {
 public static void main(String[] args) {
  final Map<String, String> options = new HashMap<>();
  options.put("dgs", "1");
  final JavaDecompileProxy decompiler = new JavaDecompileProxy(options);
  final String result = decompiler.decompile("/path/to/clazz.class");
 }
}

Command Line

kotlin -cp /path/to/jda-X.X.X.jar [FERNFLOWER OPTIONS] input_directory output_directory

By default, jda will decompile all files ending in .class within the input_directory and write the sources to their relative paths in the output_directory. Fernflower options may be specified before the input and output directories to control the decompiler behaviour. For a complete list of Fernflower flags, see the Fernflower mirror.

License

This project is licensed under the M.I.T License