servletmap.java

webwork source

/*
 * WebWork, Web Application Framework
 *
 * Distributable under Apache license.
 * See terms of license at opensource.org
 */
package webwork.action.factory;

import javax.servlet.ServletConfig;
import java.util.*;

/**
 *
 * @author Rickard 謆erg ([e-mail])
 * @version $Revision: 1.6 $
 */
class ServletMap
   extends AbstractMap
{
   ServletConfig config;
   Set entries;
   ServletMap(ServletConfig aConfig)
   {
      this.config = aConfig;
   }

   public Set entrySet()
   {
      if (entries == null)
      {
         entries = new HashSet();

         Enumeration enum = config.getInitParameterNames();
         while (enum.hasMoreElements())
         {
            final String key = enum.nextElement().toString();
            final Object value = config.getInitParameter(key);
            entries.add(new Map.Entry()
            {
               public boolean equals(Object obj)
               {
                  Map.Entry entry = (Map.Entry)obj;
                  return (key==null ?
                     entry.getKey()==null : key.equals(entry.getKey()))  &&
                     (value==null ?
                        entry.getValue()==null : value.equals(entry.getValue()));
               }

               public int hashCode()
               {
                  return (key==null   ? 0 : key.hashCode()) ^
                          (value==null ? 0 : value.hashCode());
               }

               public Object getKey()
               {
                  return key;
               }

               public Object getValue()
               {
                  return value;
               }

               public Object setValue(Object obj)
               {
                  throw new UnsupportedOperationException("Can't set init parameter");
               }
            });
         }
      }

      return entries;
   }

   public Object put(Object key, Object value)
   {
      throw new UnsupportedOperationException("Can't set init parameter");
   }

   public Object get(Object key)
   {
      return config.getInitParameter(key.toString());
   }

   public Object remove(Object key)
   {
      throw new UnsupportedOperationException("Can't remove init parameter");
   }

   public void clear()
   {
      throw new UnsupportedOperationException("Can't clear init parameters");
   }
}