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.database.dao;
  
  import java.lang.reflect.Modifier;
  
  import com.aionemu.commons.scripting.classlistener.ClassListener;
  import com.aionemu.commons.utils.ClassUtils;
  
  /**
   * Utility class that loads all DAO's after script context initialization.<br>
   * DAO should be public, not abstract, not interface, must have default no-arg
   * public constructor.
   * 
   * @author SoulKeeper, Aquanox
   */
  public class DAOLoader implements ClassListener {
  
  	@SuppressWarnings("unchecked")
  	@Override
  	public void postLoad(Class<?>[] classes) {
  		// Register DAOs
  		for (Class<?> clazz : classes) {
  			if (!isValidDAO(clazz))
  				continue;
  
  			try {
  				DAOManager.registerDAO((Class<? extends DAO>) clazz);
  			} catch (Exception e) {
  				throw new Error("Can't register DAO class", e);
  			}
  		}
  	}
  
  	@SuppressWarnings("unchecked")
  	@Override
  	public void preUnload(Class<?>[] classes) {
  		// Unregister DAO's
  		for (Class<?> clazz : classes) {
  			if (!isValidDAO(clazz))
  				continue;
  
  			try {
  				DAOManager.unregisterDAO((Class<? extends DAO>) clazz);
  			} catch (Exception e) {
  				throw new Error("Can't unregister DAO class", e);
  			}
  		}
  	}
  
  	/**
  	 * @param clazz
  	 * @return boolean
  	 */
  	public boolean isValidDAO(Class<?> clazz) {
  		if (!ClassUtils.isSubclass(clazz, DAO.class))
  			return false;
  
  		final int modifiers = clazz.getModifiers();
  
  		if (Modifier.isAbstract(modifiers) || Modifier.isInterface(modifiers))
  			return false;
  
  		if (!Modifier.isPublic(modifiers))
  			return false;
  
  		if (clazz.isAnnotationPresent(DisabledDAO.class))
  			return false;
  
  		return true;
  	}
  }
  