/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.myfaces.application.pss;
  
  import javax.servlet.http.HttpServletResponseWrapper;
  import javax.servlet.http.HttpServletResponse;
  import javax.servlet.ServletOutputStream;
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.io.CharArrayWriter;
  
  /**
   * @author Martin Haimberger
   */
  public class ViewHandlerResponseWrapperHelperImpl extends HttpServletResponseWrapper {
      private TempServletOutputStream tempOS = null;
      private PrintWriter pw = null;
      private CharArrayWriter caw = null;
      private int status = HttpServletResponse.SC_OK;
  
      public PrintWriter getPw() {
          if (pw == null) {
              caw = new CharArrayWriter();
              pw = new PrintWriter(caw);
          }
          return pw;
      }
  
      public ServletOutputStream getTempOS() {
          if (tempOS == null)
          {
              tempOS = new TempServletOutputStream();
          }
          return tempOS;
      }
  
      public ViewHandlerResponseWrapperHelperImpl(HttpServletResponse httpServletResponse) {
          super(httpServletResponse);
      }
  
  
      // from HttpServletResponseWrapper
      public void sendError(int i, String string) throws IOException {
          super.sendError(i, string);
          status = i;
      }
  
      public void sendError(int i) throws IOException {
          super.sendError(i);
          status = i;
      }
  
      public void setStatus(int i) {
          super.setStatus(i);
          status = i;
      }
  
      public void setStatus(int i, String string) {
          super.setStatus(i, string);
          status = i;
      }
  
  
      public String toString() {
          String result = null;
      if (caw != null) {
          result = caw.toString();
      }
      else if (tempOS != null) {
          result = tempOS.toString();
      }
  
      return result;
      }
  
      public PrintWriter getWriter() throws IOException {
          return getPw();
      }
  
      public ServletOutputStream getOutputStream() throws IOException {
          return getTempOS();
      }
  
     public void resetWriter() {
         if (caw != null)
         {
             pw.flush();
             caw.flush();
             caw.reset();
         }
     }
 
 
 }