/*
    * Copyright (C) 2010 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.services.portletcache;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  
  /**
   * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
   * @version $Revision$
   */
  class Util
  {
  
    static Map<String, String[]> clone(Map<String, String[]> map)
    {
      if (map.isEmpty())
      {
        return Collections.emptyMap();
      }
      Map<String, String[]> copy = new HashMap<String, String[]>(map);
      for (Map.Entry<String, String[]> entry : copy.entrySet())
      {
        entry.setValue(entry.getValue().clone());
      }
      return copy;
    }
  
    static int hashCode(Map<String, String[]> map)
    {
      int hashCode = 0;
      if (map.size() > 0)
      {
        for (Map.Entry<String, String[]> parameter : map.entrySet())
        {
          int parameterHashCode = parameter.getKey().hashCode();
          for (String parameterValue : parameter.getValue())
          {
            parameterHashCode = parameterHashCode * 43 + parameterValue.hashCode();
          }
          hashCode = hashCode * 43 + parameterHashCode;
        }
      }
      return hashCode;
    }
  
    static boolean equals(Map<String, String[]> map1, Map<String, String[]> map2)
    {
      if (map1.keySet().equals(map2.keySet()))
      {
        for (Map.Entry<String, String[]> parameter : map1.entrySet())
        {
          String[] thatParameterValues = map2.get(parameter.getKey());
          if (thatParameterValues != null)
          {
            if (!Arrays.equals(parameter.getValue(), thatParameterValues))
            {
              return false;
            }
          }
        }
        return true;
      }
      return false;
    }
  
    static void toString(Map<String, String[]> map, StringBuilder sb)
    {
      sb.append('{');
      for (Iterator<Map.Entry<String, String[]>> i = map.entrySet().iterator();i.hasNext();)
      {
        Map.Entry<String, String[]> entry = i.next();
        sb.append(entry.getKey()).append('=').append('[');
        String[] value = entry.getValue();
        for (int j = 0;j < value.length;j++)
        {
          if (j > 0)
          {
            sb.append(',');
         }
         sb.append(value[j]);
       }
       sb.append(']');
       if (i.hasNext())
       {
         sb.append(',');
       }
     }
     sb.append('}');
   }
 }