JRubyScopeTest.java

import java.util.ArrayList;

import org.jruby.Ruby;
import org.jruby.RubyClass;
import org.jruby.RubyString;
import org.jruby.javasupport.JavaEmbedUtils;
import org.jruby.runtime.Arity;
import org.jruby.runtime.Block;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.runtime.callback.Callback;

/**
 * 再現環境：
 * jruby.jar (1.0.3)
 * backport-util-concurrent.jar
 * asm-2.2.3.jar
 * @author shimarin
 */
public class JRubyScopeTest {

	public static void main(String[] args) {
		Ruby runtime = JavaEmbedUtils.initialize(new ArrayList<String>());
		
		// class MyClass ...  end
		RubyClass myClass = runtime.defineClass("MyClass", 
				runtime.getObject(), runtime.getObject().getAllocator());
		
		// def hoge
		myClass.defineMethod("hoge", new Callback() {
			public IRubyObject execute(IRubyObject self, IRubyObject[] args, Block block) {
				ThreadContext context = self.getRuntime().getCurrentContext();
				// self.eval (*args)
				return self.callMethod(context, "eval", args, block);
			}
			public Arity getArity() {
				return Arity.ONE_REQUIRED;
			}
		});

		System.out.println("Java版 Rubyクラス");
		callHogeTwice(runtime, myClass);
		
		runtime.evalScript("class MyClass2; def hoge(expr); eval(expr); end; end");
		myClass = runtime.getClass("MyClass2");

		System.out.println("Ruby版 Rubyクラス");
		callHogeTwice(runtime, myClass);
}
	
	private static void callHogeTwice(Ruby runtime, RubyClass clazz)
	{
		// myObj = MyClass.new
		IRubyObject myObject = clazz.allocate();
		// myObj.hoge("a=1")
		myObject.callMethod(runtime.getCurrentContext(), 
				"hoge", RubyString.newUnicodeString(runtime, "a=1"));
		// myObj = MyClass.new
		myObject = clazz.allocate();
		// myObj.hoge("p a")
		myObject.callMethod(runtime.getCurrentContext(), 
				"hoge", RubyString.newUnicodeString(runtime, "p a"));
		
	}

}