/*
 * Copyright (C) 2003-2011 eXo Platform SAS.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.etk.common.utils;

import java.util.ArrayList;

/**
 * Created by The eXo Platform SAS Author : eXoPlatform
 * thanhvucong.78@google.com Aug 13, 2011
 */
public class ListenerStack extends ArrayList {
  public ListenerStack() {
    super();
  }

  public ListenerStack(int size) {
    super(size);
  }

  public void add(int index, Object element) {
    throw new UnsupportedOperationException("use add(java.lang.Object)");
  }

  public boolean add(java.lang.Object obj) {
    String name = obj.getClass().getName();
    for (int i = 0; i < size(); i++) {
      Object found = get(i);
      if (name.equals(found.getClass().getName())) {
        remove(i);
        break;
      }
    }
    return super.add(obj);
  }
}