/*
    * 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.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.PrintWriter;
  
  import javax.portlet.MimeResponse;
  import javax.portlet.RenderResponse;
  import javax.portlet.filter.RenderResponseWrapper;
  
  /**
   * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
   * @version $Revision$
   */
  class BufferedRenderResponse extends RenderResponseWrapper
  {
  
     /** . */
     private ByteArrayOutputStream buffer;
  
     /** . */
     private String expirationCache;
  
     BufferedRenderResponse(RenderResponse response)
     {
        super(response);
     }
  
     public byte[] getBytes()
     {
        return buffer != null ? buffer.toByteArray() : new byte[0];
     }
  
     public String getExpirationCache()
     {
        return expirationCache;
     }
  
     @Override
     public PrintWriter getWriter() throws IOException
     {
        throw new UnsupportedOperationException("Not yet implemented");
     }
  
     @Override
     public OutputStream getPortletOutputStream() throws IOException
     {
        if (buffer == null)
        {
           buffer = new ByteArrayOutputStream();
        }
        return buffer;
     }
  
     @Override
     public void addProperty(String key, String value)
     {
        if (MimeResponse.EXPIRATION_CACHE.equals(key))
        {
           if (expirationCache != null)
           {
              expirationCache = value;
           }
        }
        else
        {
           super.addProperty(key, value);
        }
     }
  
     @Override
     public void setProperty(String key, String value)
     {
        if (MimeResponse.EXPIRATION_CACHE.equals(key))
        {
           expirationCache = value;
        }
        else
        {
          super.addProperty(key, value);
       }
    }
 }