parametermap.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.ServletRequest;
import java.util.*;

/**
 *
 * @author Rickard �berg ([e-mail])
 * @version $Revision: 1.7 $
 */
public class ParameterMap
   extends AbstractMap
{
   ServletRequest request;
   Set entries;
    private static final String SESSION_ID_PREFIX = ";jsessionid=";

    public ParameterMap(ServletRequest request)
   {
      this.request = request;
   }

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

         Enumeration enum = request.getParameterNames();
         while (enum.hasMoreElements())
         {
            final String key = enum.nextElement().toString();
            final String[] value = request.getParameterValues(key);

             //handle ;jsessionid= being passed at the end of parameters.  Fixes WW-190
             for (int i = 0; i < value.length; i++)
             {
                 String s = value[i];
                 if (s != null && s.length() > SESSION_ID_PREFIX.length() && s.indexOf(SESSION_ID_PREFIX) != -1)
                 {
                     //seeing as ;jsessionid= is always at the end of the URL, we just get the text before it
                     s = s.substring(0, s.indexOf(SESSION_ID_PREFIX));
                     value[i] = s;
                     break; //we should never have more than one ;jsessionid=
                 }
             }

            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)
               {
                  // Not allowed
                  throw new UnsupportedOperationException("Can't set parameter");
               }
            });
         }
      }

      return entries;
   }

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

   public Object get(Object key)
   {
      return request.getParameterValues(key.toString());
   }

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

   public void clear()
   {
      // Not allowed
      throw new UnsupportedOperationException("Can't remove parameters");
   }
}