How to use

setContentLength

method

in

javax.portlet.ResourceResponse

@Override
public void setContentLength(int len) {
 ((ResourceResponse)response).setContentLength(len);
}

@Override
public void setContentLength(int len) {
  if (response instanceof ResourceResponse) {
    ((ResourceResponse) response).setContentLength(len);
  }
}

public static void write(
    MimeResponse mimeResponse, byte[] bytes, int offset,
    int contentLength)
  throws IOException {
  // LEP-3122
  if (!mimeResponse.isCommitted()) {
    // LEP-536
    if (contentLength == 0) {
      contentLength = bytes.length;
    }
    if (mimeResponse instanceof ResourceResponse) {
      ResourceResponse resourceResponse =
        (ResourceResponse)mimeResponse;
      resourceResponse.setContentLength(contentLength);
    }
    OutputStream outputStream = mimeResponse.getPortletOutputStream();
    outputStream.write(bytes, offset, contentLength);
  }
}

public static void write(
    MimeResponse mimeResponse, InputStream inputStream,
    int contentLength)
  throws IOException {
  if (mimeResponse.isCommitted()) {
    if (inputStream != null) {
      try {
        inputStream.close();
      }
      catch (IOException ioe) {
        if (_log.isWarnEnabled()) {
          _log.warn(ioe, ioe);
        }
      }
    }
    return;
  }
  if (contentLength > 0) {
    if (mimeResponse instanceof ResourceResponse) {
      ResourceResponse resourceResponse =
        (ResourceResponse)mimeResponse;
      resourceResponse.setContentLength(contentLength);
    }
  }
  StreamUtil.transfer(inputStream, mimeResponse.getPortletOutputStream());
}

protected void setResponseContentLength(int len) {
  if (isResourceResponse) {
    ((ResourceResponse) this.response).setContentLength(len);
  }
}

@Override
public void setContentLength(int len) {
 if (!included && (portletResponse instanceof ResourceResponse)) {
   ((ResourceResponse) portletResponse).setContentLength(len);
 }
}

/**
 *  The default behavior of this method is to call 
 * <code>setContentLength()</code> on the wrapped response object.
 */
public void setContentLength(int len) {
  response.setContentLength(len);
}

@Override
public void setContentLength(int length) {
  wrappedResourceResponse.setContentLength(length);
}

@Override
public void setContentLength(int len) {
  resourceResponse.setContentLength(len);
}

@Override
public void setContentLength(int length) {
  wrappedResourceResponse.setContentLength(length);
}

public void setContentLength(int len) {
  getResponse().setContentLength(len);
}

public void setContentLength(int len) {
  getResponse().setContentLength(len);
}

/**
 * @see    {@link ExternalContext#setResponseContentLength(int)}
 * @since  JSF 2.0
 */
@Override
public void setResponseContentLength(int length) {
  if (portletResponse instanceof ResourceResponse) {
    ResourceResponse resourceResponse = (ResourceResponse) portletResponse;
    resourceResponse.setContentLength(length);
  }
  else {
    if (manageIncongruities) {
      incongruityContext.setResponseContentLength(length);
    }
    else {
      throw new IllegalStateException();
    }
  }
}

/**
 * @see    {@link ExternalContext#setResponseContentLength(int)}
 * @since  JSF 2.0
 */
@Override
public void setResponseContentLength(int length) {
  if (portletResponse instanceof ResourceResponse) {
    ResourceResponse resourceResponse = (ResourceResponse) portletResponse;
    resourceResponse.setContentLength(length);
  }
  else {
    if (manageIncongruities) {
      incongruityContext.setResponseContentLength(length);
    }
    else {
      throw new IllegalStateException();
    }
  }
}

 public void descargarRecibo(ResourceRequest request,
    ResourceResponse response, PortletSession session,
    ModelMap modelMap) {
  FileInputStream fileInputStream = null;
  BufferedInputStream bufferedInputStream = null;

  String fileURL = "c:/intranetdoc/PDetalleLlamadas/file.pdf";

  try {
    fileInputStream = new java.io.FileInputStream(fileURL);
    OutputStream outputStream = response.getPortletOutputStream();
    response.setContentType("application/pdf");
    response.addProperty("Content-Disposition", "attachment; filename="
        + fileName);
    bufferedInputStream = new java.io.BufferedInputStream(
        fileInputStream);
    byte[] bytes = new byte[bufferedInputStream.available()];
    response.setContentLength(bytes.length);
    int aByte = 0;
    while ((aByte = bufferedInputStream.read()) != -1) {
      outputStream.write(aByte);
    }
    outputStream.flush();
    bufferedInputStream.close();
    response.flushBuffer();
  } catch (Exception e) {
    e.printStackTrace();
  }
}

resourceResponse.setContentLength(contentLength);

resourceResponse.setContentLength(contentLength);