/*
 * Copyright 2013-2014 Yuichiro Moriguchi
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.morilib.nina.metalang;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

import net.morilib.nina.NinaException;

/**
 *
 *
 * @author MORIGUCHI, Yuichiro 2014/02/19
 */
public class NinaMetaLanguage {

	//
	private static final ScriptEngineManager MAN =
			new ScriptEngineManager();

	//
	private ScriptEngine engine;

	/**
	 * 
	 * @param lang
	 */
	public NinaMetaLanguage(String lang) {
		if((engine = MAN.getEngineByName(lang)) == null) {
			throw new NinaException("metalanguagenotfound", lang);
		}
	}

	/**
	 * 
	 * @param s
	 */
	public Object execute(String s) {
		try {
			return engine.eval(s);
		} catch (ScriptException e) {
			e.printStackTrace();
			throw new NinaException("metalanguageerror");
		}
	}

}
