public Configuration loadConfiguration(File configLocation, File installLocation) {
   try {
     return Configuration.load(configLocation, installLocation.toURL());
   } catch (ProvisionException e) {
     fail("Error while reading configuration from " + configLocation);
   } catch (MalformedURLException e) {
     fail("Unable to convert install location to URL " + installLocation);
   }
   assertTrue("Unable to read configuration from " + configLocation, false);
   // avoid compiler error
   return null;
 }
  private void doImportAction(final DataContext dataContext) {
    final FileChooserDescriptor descriptor =
        new FileChooserDescriptor(true, false, true, false, true, false) {
          @Override
          public boolean isFileVisible(VirtualFile file, boolean showHiddenFiles) {
            return super.isFileVisible(file, showHiddenFiles)
                && (file.isDirectory()
                    || "xml".equals(file.getExtension())
                    || file.getFileType() == FileTypes.ARCHIVE);
          }

          @Override
          public boolean isFileSelectable(VirtualFile file) {
            return file.getFileType() == StdFileTypes.XML;
          }
        };
    descriptor.setDescription(
        "Please select the configuration file (usually named IntelliLang.xml) to import.");
    descriptor.setTitle("Import Configuration");

    descriptor.putUserData(LangDataKeys.MODULE_CONTEXT, LangDataKeys.MODULE.getData(dataContext));

    final SplitterProportionsData splitterData = new SplitterProportionsDataImpl();
    splitterData.externalizeFromDimensionService(
        "IntelliLang.ImportSettingsKey.SplitterProportions");

    final VirtualFile file = FileChooser.chooseFile(descriptor, myProject, null);
    if (file == null) return;
    try {
      final Configuration cfg = Configuration.load(file.getInputStream());
      if (cfg == null) {
        Messages.showWarningDialog(
            myProject,
            "The selected file does not contain any importable configuration.",
            "Nothing to Import");
        return;
      }
      final CfgInfo info = getDefaultCfgInfo();
      final Map<String, Set<InjInfo>> currentMap =
          ContainerUtil.classify(
              info.injectionInfos.iterator(),
              new Convertor<InjInfo, String>() {
                public String convert(final InjInfo o) {
                  return o.injection.getSupportId();
                }
              });
      final List<BaseInjection> originalInjections = new ArrayList<BaseInjection>();
      final List<BaseInjection> newInjections = new ArrayList<BaseInjection>();
      //// remove duplicates
      // for (String supportId : InjectorUtils.getActiveInjectionSupportIds()) {
      //  final Set<BaseInjection> currentInjections = currentMap.get(supportId);
      //  if (currentInjections == null) continue;
      //  for (BaseInjection injection : currentInjections) {
      //    Configuration.importInjections(newInjections, Collections.singleton(injection),
      // originalInjections, newInjections);
      //  }
      // }
      // myInjections.clear();
      // myInjections.addAll(newInjections);

      for (String supportId : InjectorUtils.getActiveInjectionSupportIds()) {
        ArrayList<InjInfo> list =
            new ArrayList<InjInfo>(
                ObjectUtils.notNull(currentMap.get(supportId), Collections.<InjInfo>emptyList()));
        final List<BaseInjection> currentInjections = getInjectionList(list);
        final List<BaseInjection> importingInjections = cfg.getInjections(supportId);
        if (currentInjections == null) {
          newInjections.addAll(importingInjections);
        } else {
          Configuration.importInjections(
              currentInjections, importingInjections, originalInjections, newInjections);
        }
      }
      info.replace(originalInjections, newInjections);
      myInjectionsTable.getListTableModel().setItems(getInjInfoList(myInfos));
      final int n = newInjections.size();
      if (n > 1) {
        Messages.showInfoMessage(
            myProject, n + " entries have been successfully imported", "Import Successful");
      } else if (n == 1) {
        Messages.showInfoMessage(
            myProject, "One entry has been successfully imported", "Import Successful");
      } else {
        Messages.showInfoMessage(myProject, "No new entries have been imported", "Import");
      }
    } catch (Exception ex) {
      Configuration.LOG.error(ex);

      final String msg = ex.getLocalizedMessage();
      Messages.showErrorDialog(
          myProject, msg != null && msg.length() > 0 ? msg : ex.toString(), "Import Failed");
    }
  }