content: /**
   * This file is part of Aion-Lightning <aion-lightning.org>.
   *
   *  Aion-Lightning is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  Aion-Lightning is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details. *
   *  You should have received a copy of the GNU General Public License
   *  along with Aion-Lightning.
   *  If not, see <http://www.gnu.org/licenses/>.
   */
  
  package com.aionemu.commons.scripting.classlistener;
  
  import java.lang.annotation.Annotation;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.lang.reflect.Modifier;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.aionemu.commons.scripting.metadata.OnClassLoad;
  import com.aionemu.commons.scripting.metadata.OnClassUnload;
  
  /**
   * @author SoulKeeper
   */
  public class OnClassLoadUnloadListener implements ClassListener {
  
  	/**
  	 * Logger
  	 */
  	private static final Logger log = LoggerFactory.getLogger(OnClassLoadUnloadListener.class);
  
  	@Override
  	public void postLoad(Class<?>[] classes) {
  		for (Class<?> c : classes) {
  			doMethodInvoke(c.getDeclaredMethods(), OnClassLoad.class);
  		}
  	}
  
  	@Override
  	public void preUnload(Class<?>[] classes) {
  		for (Class<?> c : classes) {
  			doMethodInvoke(c.getDeclaredMethods(), OnClassUnload.class);
  		}
  	}
  
  	/**
  	 * Actually invokes method where given annotation class is present. Only
  	 * static methods can be invoked
  	 * 
  	 * @param methods
  	 *            Methods to scan for annotations
  	 * @param annotationClass
  	 *            class of annotation to search for
  	 */
  	protected final void doMethodInvoke(Method[] methods, Class<? extends Annotation> annotationClass) {
  		for (Method m : methods) {
  			if (!Modifier.isStatic(m.getModifiers()))
  				continue;
  
  			boolean accessible = m.isAccessible();
  			m.setAccessible(true);
  
  			if (m.getAnnotation(annotationClass) != null) {
  				try {
  					m.invoke(null);
  				} catch (IllegalAccessException e) {
  					log.error("Can't access method " + m.getName() + " of class " + m.getDeclaringClass().getName(), e);
  				} catch (InvocationTargetException e) {
  					log.error("Can't invoke method " + m.getName() + " of class " + m.getDeclaringClass().getName(), e);
  				}
  			}
  
  			m.setAccessible(accessible);
  		}
  	}
  }
  