protected FacesRequestParameterMap getFacesRequestParameterMap(BridgeContext bridgeContext) {

    FacesRequestParameterMap facesRequestParameterMap = null;
    PortletRequest portletRequest = bridgeContext.getPortletRequest();
    PortletResponse portletResponse = bridgeContext.getPortletResponse();
    String namespace = portletResponse.getNamespace();
    BridgeRequestScope bridgeRequestScope = bridgeContext.getBridgeRequestScope();
    String defaultRenderKitId = bridgeContext.getDefaultRenderKitId();
    Map<String, String> facesViewParameterMap = getFacesViewParameterMap(bridgeContext);

    if (portletRequest instanceof ClientDataRequest) {

      ClientDataRequest clientDataRequest = (ClientDataRequest) portletRequest;
      String contentType = clientDataRequest.getContentType();

      // Note: ICEfaces ace:fileEntry relies on its own mechanism for handling file upload.
      if (!ICEFACES_DETECTED
          && (contentType != null)
          && contentType.toLowerCase().startsWith(BridgeConstants.MULTIPART_CONTENT_TYPE_PREFIX)) {

        MultiPartFormData multiPartFormData =
            (MultiPartFormData) portletRequest.getAttribute(MULTIPART_FORM_DATA_FQCN);

        if (multiPartFormData == null) {
          facesRequestParameterMap =
              new FacesRequestParameterMapImpl(
                  namespace, bridgeRequestScope, facesViewParameterMap, defaultRenderKitId);

          MultiPartFormDataProcessor multiPartFormDataProcessor =
              new MultiPartFormDataProcessorImpl();
          Map<String, List<UploadedFile>> uploadedFileMap =
              multiPartFormDataProcessor.process(
                  clientDataRequest, bridgeContext.getPortletConfig(), facesRequestParameterMap);

          multiPartFormData = new MultiPartFormDataImpl(facesRequestParameterMap, uploadedFileMap);

          // Save the multipart/form-data in a request attribute so that it can be referenced
          // later-on in the
          // JSF lifecycle by file upload component renderers.
          portletRequest.setAttribute(MULTIPART_FORM_DATA_FQCN, multiPartFormData);
        } else {
          facesRequestParameterMap = multiPartFormData.getFacesRequestParameterMap();
        }
      }
    }

    if (facesRequestParameterMap == null) {
      Map<String, String[]> parameterMap = portletRequest.getParameterMap();
      facesRequestParameterMap =
          new FacesRequestParameterMapImpl(
              parameterMap,
              namespace,
              bridgeRequestScope,
              facesViewParameterMap,
              defaultRenderKitId);
    }

    return facesRequestParameterMap;
  }
  @SuppressWarnings("unchecked")
  public RequestParameterMapMultiPartImpl(
      BridgeContext bridgeContext, ClientDataRequest clientDataRequest) {

    try {

      PortletSession portletSession = clientDataRequest.getPortletSession();
      PortletContext portletContext = portletSession.getPortletContext();

      // Determine the uploaded files directory path according to the JSF 2.2 proposal:
      // https://javaserverfaces-spec-public.dev.java.net/issues/show_bug.cgi?id=690
      String uploadedFilesDir = portletContext.getInitParameter(CONTEXT_PARAM_UPLOADED_FILES_DIR);

      if (uploadedFilesDir == null) {
        uploadedFilesDir = System.getProperty(JAVA_IO_TMPDIR);

        if (logger.isDebugEnabled()) {
          logger.debug(
              "The web.xml context-param name=[{0}] not found, using default system property=[{1}] value=[{2}]",
              new Object[] {CONTEXT_PARAM_UPLOADED_FILES_DIR, JAVA_IO_TMPDIR, uploadedFilesDir});
        }
      } else {

        if (logger.isDebugEnabled()) {
          logger.debug(
              "Using web.xml context-param name=[{0}] value=[{1}]",
              new Object[] {CONTEXT_PARAM_UPLOADED_FILES_DIR, uploadedFilesDir});
        }
      }

      // Using the portlet sessionId, determine a unique folder path and create the path if it does
      // not exist.
      String sessionId = portletSession.getId();
      File uploadedFilesPath = new File(uploadedFilesDir, sessionId);

      if (!uploadedFilesPath.exists()) {

        try {
          uploadedFilesPath.mkdirs();
        } catch (SecurityException e) {
          uploadedFilesDir = System.getProperty(JAVA_IO_TMPDIR);
          logger.error(
              "Security exception message=[{0}] when trying to create unique path=[{1}] so using default system property=[{2}] value=[{3}]",
              new Object[] {
                e.getMessage(), uploadedFilesPath.toString(), JAVA_IO_TMPDIR, uploadedFilesDir
              });
          uploadedFilesPath = new File(uploadedFilesDir, sessionId);
          uploadedFilesPath.mkdirs();
        }
      }

      // Initialize commons-fileupload with the file upload path.
      DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();
      diskFileItemFactory.setRepository(uploadedFilesPath);

      // Initialize commons-fileupload so that uploaded temporary files are not automatically
      // deleted.
      diskFileItemFactory.setFileCleaningTracker(null);

      // Initialize the commons-fileupload size threshold to zero, so that all files will be dumped
      // to disk
      // instead of staying in memory.
      diskFileItemFactory.setSizeThreshold(0);

      // Determine the max file upload size threshold in bytes.
      String uploadedFilesMaxSize =
          portletContext.getInitParameter(CONTEXT_PARAM_UPLOADED_FILE_MAX_SIZE);
      int fileMaxSize = DEFAULT_FILE_MAX_SIZE;

      if (uploadedFilesMaxSize == null) {

        if (logger.isDebugEnabled()) {
          logger.debug(
              "The web.xml context-param name=[{0}] not found, using default=[{1}] bytes",
              new Object[] {CONTEXT_PARAM_UPLOADED_FILE_MAX_SIZE, DEFAULT_FILE_MAX_SIZE});
        }
      } else {

        try {
          fileMaxSize = Integer.parseInt(uploadedFilesMaxSize);

          if (logger.isDebugEnabled()) {
            logger.debug(
                "Using web.xml context-param name=[{0}] value=[{1}] bytes",
                new Object[] {CONTEXT_PARAM_UPLOADED_FILE_MAX_SIZE, fileMaxSize});
          }
        } catch (NumberFormatException e) {
          logger.error(
              "Invalid value=[{0}] for web.xml context-param name=[{1}] using default=[{2}] bytes.",
              new Object[] {
                uploadedFilesMaxSize, CONTEXT_PARAM_UPLOADED_FILE_MAX_SIZE, DEFAULT_FILE_MAX_SIZE
              });
        }
      }

      // Parse the request parameters and save all uploaded files in a map.
      PortletFileUpload portletFileUpload = new PortletFileUpload(diskFileItemFactory);
      portletFileUpload.setFileSizeMax(fileMaxSize);
      requestParameterMap = new HashMap<String, String>();
      requestParameterFileMap = new HashMap<String, List<UploadedFile>>();

      // Get the namespace that might be found in request parameter names.
      String namespace = bridgeContext.getPortletContainer().getResponseNamespace();

      // FACES-271: Include name+value pairs found in the ActionRequest.
      PortletContainer portletContainer = bridgeContext.getPortletContainer();
      Set<Map.Entry<String, String[]>> actionRequestParameterSet =
          clientDataRequest.getParameterMap().entrySet();

      for (Map.Entry<String, String[]> mapEntry : actionRequestParameterSet) {

        String parameterName = mapEntry.getKey();
        int pos = parameterName.indexOf(namespace);

        if (pos >= 0) {
          parameterName = parameterName.substring(pos + namespace.length());
        }

        String[] parameterValues = mapEntry.getValue();

        if (parameterValues.length > 0) {
          String fixedRequestParameterValue =
              portletContainer.fixRequestParameterValue(parameterValues[0]);
          requestParameterMap.put(parameterName, fixedRequestParameterValue);
          logger.debug(
              "Found in ActionRequest: {0}=[{1}]", parameterName, fixedRequestParameterValue);
        }
      }

      UploadedFileFactory uploadedFileFactory =
          (UploadedFileFactory) BridgeFactoryFinder.getFactory(UploadedFileFactory.class);

      // Begin parsing the request for file parts:
      try {
        FileItemIterator fileItemIterator = null;

        if (clientDataRequest instanceof ResourceRequest) {
          ResourceRequest resourceRequest = (ResourceRequest) clientDataRequest;
          fileItemIterator =
              portletFileUpload.getItemIterator(new ActionRequestAdapter(resourceRequest));
        } else {
          ActionRequest actionRequest = (ActionRequest) clientDataRequest;
          fileItemIterator = portletFileUpload.getItemIterator(actionRequest);
        }

        boolean optimizeNamespace =
            BooleanHelper.toBoolean(
                bridgeContext.getInitParameter(
                    BridgeConfigConstants.PARAM_OPTIMIZE_PORTLET_NAMESPACE1),
                true);

        if (fileItemIterator != null) {

          int totalFiles = 0;

          // For each field found in the request:
          while (fileItemIterator.hasNext()) {

            try {
              totalFiles++;

              // Get the stream of field data from the request.
              FileItemStream fieldStream = (FileItemStream) fileItemIterator.next();

              // Get field name from the field stream.
              String fieldName = fieldStream.getFieldName();

              // If namespace optimization is enabled and the namespace is present in the field
              // name,
              // then remove the portlet namespace from the field name.
              if (optimizeNamespace) {
                int pos = fieldName.indexOf(namespace);

                if (pos >= 0) {
                  fieldName = fieldName.substring(pos + namespace.length());
                }
              }

              // Get the content-type, and file-name from the field stream.
              String contentType = fieldStream.getContentType();
              boolean formField = fieldStream.isFormField();

              String fileName = null;

              try {
                fileName = fieldStream.getName();
              } catch (InvalidFileNameException e) {
                fileName = e.getName();
              }

              // Copy the stream of file data to a temporary file. NOTE: This is necessary even if
              // the
              // current field is a simple form-field because the call below to
              // diskFileItem.getString()
              // will fail otherwise.
              DiskFileItem diskFileItem =
                  (DiskFileItem)
                      diskFileItemFactory.createItem(fieldName, contentType, formField, fileName);
              Streams.copy(fieldStream.openStream(), diskFileItem.getOutputStream(), true);

              // If the current field is a simple form-field, then save the form field value in the
              // map.
              if (diskFileItem.isFormField()) {
                String requestParameterValue =
                    diskFileItem.getString(clientDataRequest.getCharacterEncoding());
                String fixedRequestParameterValue =
                    portletContainer.fixRequestParameterValue(requestParameterValue);
                requestParameterMap.put(fieldName, fixedRequestParameterValue);
                logger.debug("{0}=[{1}]", fieldName, fixedRequestParameterValue);
              } else {

                File tempFile = diskFileItem.getStoreLocation();

                // If the copy was successful, then
                if (tempFile.exists()) {

                  // Copy the commons-fileupload temporary file to a file in the same temporary
                  // location, but with the filename provided by the user in the upload. This has
                  // two
                  // benefits: 1) The temporary file will have a nice meaningful name. 2) By copying
                  // the file, the developer can have access to a semi-permanent file, because the
                  // commmons-fileupload DiskFileItem.finalize() method automatically deletes the
                  // temporary one.
                  String tempFileName = tempFile.getName();
                  String tempFileAbsolutePath = tempFile.getAbsolutePath();

                  String copiedFileName = stripIllegalCharacters(fileName);

                  String copiedFileAbsolutePath =
                      tempFileAbsolutePath.replace(tempFileName, copiedFileName);
                  File copiedFile = new File(copiedFileAbsolutePath);
                  FileUtils.copyFile(tempFile, copiedFile);

                  // If present, build up a map of headers.
                  Map<String, List<String>> headersMap = new HashMap<String, List<String>>();
                  FileItemHeaders fileItemHeaders = fieldStream.getHeaders();

                  if (fileItemHeaders != null) {
                    Iterator<String> headerNameItr = fileItemHeaders.getHeaderNames();

                    if (headerNameItr != null) {

                      while (headerNameItr.hasNext()) {
                        String headerName = headerNameItr.next();
                        Iterator<String> headerValuesItr = fileItemHeaders.getHeaders(headerName);
                        List<String> headerValues = new ArrayList<String>();

                        if (headerValuesItr != null) {

                          while (headerValuesItr.hasNext()) {
                            String headerValue = headerValuesItr.next();
                            headerValues.add(headerValue);
                          }
                        }

                        headersMap.put(headerName, headerValues);
                      }
                    }
                  }

                  // Put a valid UploadedFile instance into the map that contains all of the
                  // uploaded file's attributes, along with a successful status.
                  Map<String, Object> attributeMap = new HashMap<String, Object>();
                  String id = Long.toString(((long) hashCode()) + System.currentTimeMillis());
                  String message = null;
                  UploadedFile uploadedFile =
                      uploadedFileFactory.getUploadedFile(
                          copiedFileAbsolutePath,
                          attributeMap,
                          diskFileItem.getCharSet(),
                          diskFileItem.getContentType(),
                          headersMap,
                          id,
                          message,
                          fileName,
                          diskFileItem.getSize(),
                          UploadedFile.Status.FILE_SAVED);

                  requestParameterMap.put(fieldName, copiedFileAbsolutePath);
                  addUploadedFile(fieldName, uploadedFile);
                  logger.debug(
                      "Received uploaded file fieldName=[{0}] fileName=[{1}]", fieldName, fileName);
                }
              }
            } catch (Exception e) {
              logger.error(e);

              UploadedFile uploadedFile = uploadedFileFactory.getUploadedFile(e);
              String fieldName = Integer.toString(totalFiles);
              addUploadedFile(fieldName, uploadedFile);
            }
          }
        }
      }

      // If there was an error in parsing the request for file parts, then put a bogus UploadedFile
      // instance in
      // the map so that the developer can have some idea that something went wrong.
      catch (Exception e) {
        logger.error(e);

        UploadedFile uploadedFile = uploadedFileFactory.getUploadedFile(e);
        addUploadedFile("unknown", uploadedFile);
      }

      clientDataRequest.setAttribute(PARAM_UPLOADED_FILES, requestParameterFileMap);

      // If not found in the request, Section 6.9 of the Bridge spec requires that the value of the
      // ResponseStateManager.RENDER_KIT_ID_PARAM request parameter be set to the value of the
      // "javax.portlet.faces.<portletName>.defaultRenderKitId" PortletContext attribute.
      String renderKitIdParam = requestParameterMap.get(ResponseStateManager.RENDER_KIT_ID_PARAM);

      if (renderKitIdParam == null) {
        renderKitIdParam = bridgeContext.getDefaultRenderKitId();

        if (renderKitIdParam != null) {
          requestParameterMap.put(ResponseStateManager.RENDER_KIT_ID_PARAM, renderKitIdParam);
        }
      }
    } catch (Exception e) {
      logger.error(e.getMessage(), e);
    }
  }