/*
    * 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.tobago.internal.webapp;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.servlet.ServletOutputStream;
  import javax.servlet.http.HttpServletResponse;
  import javax.servlet.http.HttpServletResponseWrapper;
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.io.StringWriter;
  
  public class TobagoResponse extends HttpServletResponseWrapper {
  
    private static final Logger LOG = LoggerFactory.getLogger(TobagoResponse.class);
  
    private PrintWriter printWriter = null;
    private StringWriter bufferedWriter = null;
  
  
    public TobagoResponse(HttpServletResponse base) {
      super(base);
    }
  
    public void setBuffering() {
      if (bufferedWriter == null) {
        bufferedWriter = new StringWriter();
        printWriter = new PrintWriter(bufferedWriter);
      }
    }
  
    public String getBufferedString() {
      if (bufferedWriter != null) {
        printWriter.flush();
        return bufferedWriter.toString();
      } else {
        return "";
      }
    }
  
    @Override
    public ServletOutputStream getOutputStream() throws IOException {
      LOG.debug("***** getOutputStream() from " + new Exception().getStackTrace()[1]);
      return getResponse().getOutputStream();
    }
  
    @Override
    public PrintWriter getWriter() throws IOException {
      LOG.debug("***** getWriter() from " + new Exception().getStackTrace()[1]);
      if (printWriter != null) {
        return printWriter;
      }
      return getResponse().getWriter();
    }
  
  
    @Override
    public void setContentType(String s) {
      LOG.debug("***** setContentType(" + s + ") from " + new Exception().getStackTrace()[1]);
      getResponse().setContentType(s);
    }
  
  }