@Nullable
  @Override
  public OrderEntry findIdeModuleOrderEntry(@NotNull DependencyData data) {
    Module ownerIdeModule = findIdeModule(data.getOwnerModule());
    if (ownerIdeModule == null) return null;

    LibraryDependencyData libraryDependencyData = null;
    ModuleDependencyData moduleDependencyData = null;
    if (data instanceof LibraryDependencyData) {
      libraryDependencyData = (LibraryDependencyData) data;
    } else if (data instanceof ModuleDependencyData) {
      moduleDependencyData = (ModuleDependencyData) data;
    } else {
      return null;
    }

    for (OrderEntry entry : getOrderEntries(ownerIdeModule)) {
      if (entry instanceof LibraryOrderEntry && libraryDependencyData != null) {
        if (((LibraryOrderEntry) entry).isModuleLevel()
            && libraryDependencyData.getLevel() != LibraryLevel.MODULE) continue;
        if (StringUtil.isEmpty(((LibraryOrderEntry) entry).getLibraryName())) {
          final Set<String> paths =
              ContainerUtil.map2Set(
                  libraryDependencyData.getTarget().getPaths(LibraryPathType.BINARY),
                  new Function<String, String>() {
                    @Override
                    public String fun(String path) {
                      return PathUtil.getLocalPath(path);
                    }
                  });
          final Set<String> entryPaths =
              ContainerUtil.map2Set(
                  entry.getUrls(OrderRootType.CLASSES),
                  new Function<String, String>() {
                    @Override
                    public String fun(String s) {
                      return PathUtil.getLocalPath(VfsUtilCore.urlToPath(s));
                    }
                  });
          if (entryPaths.equals(paths) && ((LibraryOrderEntry) entry).getScope() == data.getScope())
            return entry;
          continue;
        }
      }

      String entryName =
          libraryDependencyData != null
              ? libraryDependencyData.getInternalName()
              : moduleDependencyData.getInternalName();
      if (entryName.equals(entry.getPresentableName())
          && (!(entry instanceof ExportableOrderEntry)
              || ((ExportableOrderEntry) entry).getScope() == data.getScope())) {
        return entry;
      }
    }
    return null;
  }
 private void importMissing(
     @NotNull Set<LibraryDependencyData> toImport,
     @NotNull ModifiableRootModel moduleRootModel,
     @NotNull LibraryTable moduleLibraryTable,
     @NotNull LibraryTable libraryTable,
     @NotNull Module module) {
   for (LibraryDependencyData dependencyData : toImport) {
     LibraryData libraryData = dependencyData.getTarget();
     if (libraryData.isUnresolved()) {
       continue;
     }
     switch (dependencyData.getLevel()) {
       case MODULE:
         @SuppressWarnings("ConstantConditions")
         Library moduleLib = moduleLibraryTable.createLibrary(dependencyData.getName());
         Library.ModifiableModel libModel = moduleLib.getModifiableModel();
         try {
           Map<OrderRootType, Collection<File>> files =
               myLibraryManager.prepareLibraryFiles(libraryData);
           myLibraryManager.registerPaths(files, libModel, dependencyData.getName());
         } finally {
           libModel.commit();
         }
         break;
       case PROJECT:
         final Library projectLib = libraryTable.getLibraryByName(dependencyData.getName());
         if (projectLib == null) {
           assert false;
           continue;
         }
         LibraryOrderEntry orderEntry = moduleRootModel.addLibraryEntry(projectLib);
         LOG.info(
             String.format(
                 "Adding library dependency '%s' to module '%s'",
                 projectLib.getName(), module.getName()));
         orderEntry.setExported(dependencyData.isExported());
         orderEntry.setScope(dependencyData.getScope());
         LOG.info(
             String.format(
                 "Configuring library dependency '%s' of module '%s' to be%s exported and have scope %s",
                 projectLib.getName(),
                 module.getName(),
                 dependencyData.isExported() ? " not" : "",
                 dependencyData.getScope()));
     }
   }
 }
  private LibraryOrderEntry syncExistingLibraryDependency(
      @NotNull IdeModifiableModelsProvider modelsProvider,
      @NotNull final LibraryDependencyData libraryDependencyData,
      @NotNull final Library library,
      @NotNull final ModifiableRootModel moduleRootModel,
      @NotNull final Module module) {
    final Library.ModifiableModel libraryModel = modelsProvider.getModifiableLibraryModel(library);
    final String libraryName = libraryDependencyData.getInternalName();
    Map<OrderRootType, Collection<File>> files =
        myLibraryManager.prepareLibraryFiles(libraryDependencyData.getTarget());
    myLibraryManager.registerPaths(files, libraryModel, libraryName);
    LibraryOrderEntry orderEntry =
        findLibraryOrderEntry(moduleRootModel, library, libraryDependencyData.getScope());

    assert orderEntry != null;
    setLibraryScope(orderEntry, library, module, libraryDependencyData);
    return orderEntry;
  }
 private void importMissing(
     @NotNull IdeModifiableModelsProvider modelsProvider,
     @NotNull Set<LibraryDependencyData> toImport,
     @NotNull Map<OrderEntry, OrderAware> orderEntryDataMap,
     @NotNull ModifiableRootModel moduleRootModel,
     @NotNull LibraryTable moduleLibraryTable,
     @NotNull Module module) {
   for (final LibraryDependencyData dependencyData : toImport) {
     final LibraryData libraryData = dependencyData.getTarget();
     final String libraryName = libraryData.getInternalName();
     switch (dependencyData.getLevel()) {
       case MODULE:
         final Library moduleLib;
         if (libraryName.isEmpty()) {
           moduleLib = moduleLibraryTable.createLibrary();
         } else {
           moduleLib = moduleLibraryTable.createLibrary(libraryName);
         }
         final LibraryOrderEntry existingLibraryDependency =
             syncExistingLibraryDependency(
                 modelsProvider, dependencyData, moduleLib, moduleRootModel, module);
         orderEntryDataMap.put(existingLibraryDependency, dependencyData);
         break;
       case PROJECT:
         final Library projectLib = modelsProvider.getLibraryByName(libraryName);
         if (projectLib == null) {
           final LibraryOrderEntry existingProjectLibraryDependency =
               syncExistingLibraryDependency(
                   modelsProvider,
                   dependencyData,
                   moduleLibraryTable.createLibrary(libraryName),
                   moduleRootModel,
                   module);
           orderEntryDataMap.put(existingProjectLibraryDependency, dependencyData);
           break;
         }
         LibraryOrderEntry orderEntry = moduleRootModel.addLibraryEntry(projectLib);
         orderEntryDataMap.put(orderEntry, dependencyData);
         setLibraryScope(orderEntry, projectLib, module, dependencyData);
     }
   }
 }
  @Override
  protected Map<OrderEntry, OrderAware> importData(
      @NotNull final Collection<DataNode<LibraryDependencyData>> nodesToImport,
      @NotNull final Module module,
      @NotNull final IdeModifiableModelsProvider modelsProvider) {
    // The general idea is to import all external project library dependencies and module libraries
    // which don't present at the
    // ide side yet and remove all project library dependencies and module libraries which present
    // at the ide but not at
    // the given collection.
    // The trick is that we should perform module settings modification inside try/finally block
    // against target root model.
    // That means that we need to prepare all necessary data, obtain a model and modify it as
    // necessary.
    final Map<Set<String> /* library paths */, LibraryDependencyData> moduleLibrariesToImport =
        ContainerUtilRt.newHashMap();
    final Map<String /* library name + scope */, LibraryDependencyData> projectLibrariesToImport =
        ContainerUtilRt.newHashMap();
    final Set<LibraryDependencyData> toImport = ContainerUtilRt.newLinkedHashSet();
    final Map<OrderEntry, OrderAware> orderEntryDataMap = ContainerUtil.newLinkedHashMap();

    boolean hasUnresolved = false;
    for (DataNode<LibraryDependencyData> dependencyNode : nodesToImport) {
      LibraryDependencyData dependencyData = dependencyNode.getData();
      LibraryData libraryData = dependencyData.getTarget();
      hasUnresolved |= libraryData.isUnresolved();
      switch (dependencyData.getLevel()) {
        case MODULE:
          Set<String> paths = ContainerUtilRt.newHashSet();
          for (String path : libraryData.getPaths(LibraryPathType.BINARY)) {
            paths.add(
                ExternalSystemApiUtil.toCanonicalPath(path) + dependencyData.getScope().name());
          }
          moduleLibrariesToImport.put(paths, dependencyData);
          toImport.add(dependencyData);
          break;
        case PROJECT:
          projectLibrariesToImport.put(
              libraryData.getInternalName() + dependencyData.getScope().name(), dependencyData);
          toImport.add(dependencyData);
      }
    }

    final boolean finalHasUnresolved = hasUnresolved;

    final ModifiableRootModel modifiableRootModel = modelsProvider.getModifiableRootModel(module);
    LibraryTable moduleLibraryTable = modifiableRootModel.getModuleLibraryTable();
    syncExistingAndRemoveObsolete(
        modelsProvider,
        moduleLibrariesToImport,
        projectLibrariesToImport,
        toImport,
        orderEntryDataMap,
        modifiableRootModel,
        finalHasUnresolved);
    // Import missing library dependencies.
    if (!toImport.isEmpty()) {
      importMissing(
          modelsProvider,
          toImport,
          orderEntryDataMap,
          modifiableRootModel,
          moduleLibraryTable,
          module);
    }
    return orderEntryDataMap;
  }