ExtensionLoader.java

package ragefist.extension;

import java.util.logging.Level;
import java.util.logging.Logger;

/*
 * Created by Andrey Cherkashin (acherkashin)
 * http://acherkashin.me
 * 
 * License
 * Copyright (c) 2015 Andrey Cherkashin
 * The project released under the MIT license: http://opensource.org/licenses/MIT
 */

/**
 * @author acherkashin
 */
public class ExtensionLoader
{
	public static Extension load(String name) {
		Class<?> extensionClass;
		try {
			extensionClass = Class.forName("ragefist.extension."+name+".ExtensionHandler");
		} catch (ClassNotFoundException ex) {
			Logger.getLogger(ExtensionLoader.class.getName()).log(Level.SEVERE, null, ex);
			return null;
		}
		
		Class<? extends Extension> extensionMainClass;
		try {
			extensionMainClass = extensionClass.asSubclass(Extension.class);
		} catch(ClassCastException ex) {
			Logger.getLogger(ExtensionLoader.class.getName()).log(Level.SEVERE, null, ex);
			return null;
		}
		
		try {
			return extensionMainClass.newInstance();
		} catch (InstantiationException | IllegalAccessException ex) {
			Logger.getLogger(ExtensionLoader.class.getName()).log(Level.SEVERE, null, ex);
		}
		return null;
	}
}