package org.andromda.cartridges.jsf;
   
   import java.io.BufferedInputStream;
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.OutputStream;
   
   import javax.servlet.ServletException;
   import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  /**
   * A servlet allowing us to load resources from a jar and make them available to
   * the web application.
   */
  public class JSFServlet
      extends HttpServlet
  {
      private static final long serialVersionUID = 34L;
      /**
       * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest,
       *      javax.servlet.http.HttpServletResponse)
       */
      public void doGet(
          HttpServletRequest request,
          HttpServletResponse response)
          throws ServletException, IOException
      {
          final String uri = request.getRequestURI();
          final String path =
              '/' + uri.substring(uri.indexOf(Constants.RESOURCE_CONTEXT) + Constants.RESOURCE_CONTEXT.length() + 1);
          final InputStream resource = JSFServlet.class.getResourceAsStream(path);
          if (resource == null)
          {
              throw new ServletException("Could not load resource from path '" + path + '\'');
          }
  
          // - write resource to the output stream
          final OutputStream out = response.getOutputStream();
          final byte[] buffer = new byte[2048];
          BufferedInputStream inputStream = new BufferedInputStream(resource);
          int read = 0;
          read = inputStream.read(buffer);
          while (read != -1)
          {
              out.write(
                  buffer,
                  0,
                  read);
              read = inputStream.read(buffer);
          }
          inputStream.close();
          out.flush();
          out.close();
      }
  }