java2xtend

The aim it to aid in converting pure Java code to Xtend sources. Uses Eclipse JDT AST for Java parsing.

You can try it online at http://www.j2x.cloudbees.net/

The comverter also tries to Xtend'ify Java constructs like:

• obj1.equals(obj2) -> obj1 == obj2
• obj1 == obj2 -> obj1 === obj2
• System.out.println(...) -> println(...)
• private final String v="abc"; -> val v="abc"
• person.setName(other.getPerson().getName); -> person.name = other.person.name

Example 1:

public class HelloWorld {
	public static void main(String[] args) {
		System.out.println("Hello World!");
	}
}

after convertion will become

class HelloWorld {
	def static void main(String[] args) {
		println("Hello World!")
	}
}

Example 2:

package com.example;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class Test implements Serializable {
	private static final long serialVersionUID = 1L;
	private List<String> list = null;
	private List<String> otherList = new ArrayList<String>();

	public Test(List<String> list) {
		this.list = list;
	}
}

will yeld

package com.example

import java.io.Serializable
import java.util.ArrayList
import java.util.List

class Test implements Serializable {
	static val serialVersionUID = 1L
	List<String> list = null
	var otherList = new ArrayList<String>()

	new(List<String> list) {
		this.list = list;
	}
}

Usage

val j2x = new org.eclipse.xtend.java2xtend.Java2Xtend;
val javaCode = '//java code'
val String xtendCode = j2x.toXtend(javaCode);

Build

1. Generate Eclipse project: mvn eclipse:eclipse
2. In Eclipse import the project using File > Import > Existing project into workspace...
3. Make sure you have the Xtend Eclipse Plugin. You can install it from Eclipse marketplace (Help > Eclipse Marketplace ...)