/**
 * Copyright (C) 2009 eXo Platform SAS.
 * 
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 * 
 * This software 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.portal.resource;

/**
 * A key for skin config lookup.
 *
 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
 * @version $Revision$
 */
class SkinKey
{

   private final String module;

   private final String name;

   private final int hashCode;

   /**
    * Creates a new skin key.
    *
    * @param module the skin base
    * @param name the skin name
    * @throws IllegalArgumentException if any argument is null
    */
   public SkinKey(String module, String name) throws IllegalArgumentException
   {
      if (module == null)
      {
         throw new IllegalArgumentException("No null base accepted");
      }
      if (name == null)
      {
         throw new IllegalArgumentException("No null skin name accepted");
      }

      //
      this.module = module;
      this.name = name;
      this.hashCode = module.hashCode() * 41 + name.hashCode();
   }

   public String getModule()
   {
      return module;
   }

   public String getName()
   {
      return name;
   }

   public int hashCode()
   {
      return hashCode;
   }

   public boolean equals(Object obj)
   {
      if (obj == null)
      {
         return false;
      }
      if (obj == this)
      {
         return true;
      }
      if (obj instanceof SkinKey)
      {
         SkinKey that = (SkinKey)obj;
         return that.module.equals(module) && that.name.equals(name);
      }
      return false;
   }

   public String toString()
   {
      return "SkinKey[base=" + module + ",name=" + name + "]";
   }
}
