private synchronized void assertAllPointersDisposed() {
    for (Map.Entry<VirtualFilePointerListener, FilePointerPartNode> entry : myPointers.entrySet()) {
      FilePointerPartNode root = entry.getValue();
      ArrayList<FilePointerPartNode> left = new ArrayList<FilePointerPartNode>();
      root.getPointersUnder(null, false, "", left);
      if (!left.isEmpty()) {
        VirtualFilePointerImpl p = left.get(0).leaf;
        try {
          p.throwDisposalError("Not disposed pointer: " + p);
        } finally {
          for (FilePointerPartNode pair : left) {
            VirtualFilePointerImpl pointer = pair.leaf;
            pointer.dispose();
          }
        }
      }
    }

    synchronized (myContainers) {
      if (!myContainers.isEmpty()) {
        VirtualFilePointerContainerImpl container = myContainers.iterator().next();
        container.throwDisposalError("Not disposed container");
      }
    }
  }
  @NotNull
  private VirtualFilePointer create(
      @Nullable VirtualFile file,
      @NotNull String url,
      @NotNull final Disposable parentDisposable,
      @Nullable VirtualFilePointerListener listener) {
    String protocol;
    VirtualFileSystem fileSystem;
    if (file == null) {
      protocol = VirtualFileManager.extractProtocol(url);
      fileSystem = myVirtualFileManager.getFileSystem(protocol);
    } else {
      protocol = null;
      fileSystem = file.getFileSystem();
    }
    if (fileSystem == TempFileSystem.getInstance()) {
      // for tests, recreate always since
      VirtualFile found =
          fileSystem == null
              ? null
              : file != null ? file : VirtualFileManager.getInstance().findFileByUrl(url);
      return new IdentityVirtualFilePointer(found, url);
    }
    if (fileSystem != LocalFileSystem.getInstance() && fileSystem != JarFileSystem.getInstance()) {
      // we are unable to track alien file systems for now
      VirtualFile found =
          fileSystem == null
              ? null
              : file != null ? file : VirtualFileManager.getInstance().findFileByUrl(url);
      // if file is null, this pointer will never be alive
      return getOrCreateIdentity(url, found);
    }

    String path;
    if (file == null) {
      path = VirtualFileManager.extractPath(url);
      path = cleanupPath(path, protocol);
      url = VirtualFileManager.constructUrl(protocol, path);
    } else {
      path = file.getPath();
      // url has come from VirtualFile.getUrl() and is good enough
    }

    VirtualFilePointerImpl pointer = getOrCreate(file, url, parentDisposable, listener, path);

    int newCount = pointer.incrementUsageCount();

    if (newCount == 1) {
      Disposer.register(parentDisposable, pointer);
    } else {
      // already registered
      register(parentDisposable, pointer);
    }

    return pointer;
  }
  @Override
  public void after(@NotNull final List<? extends VFileEvent> events) {
    incModificationCount();

    for (FilePointerPartNode node : myPointersToUpdateUrl) {
      synchronized (this) {
        VirtualFilePointerImpl pointer = node.leaf;
        String urlBefore = pointer.getUrlNoUpdate();
        Pair<VirtualFile, String> after = node.update();
        String urlAfter = after.second;
        if (URL_COMPARATOR.compare(urlBefore, urlAfter) != 0) {
          // url has changed, reinsert
          FilePointerPartNode root = myPointers.get(pointer.getListener());
          int useCount = node.useCount;
          node.remove();
          FilePointerPartNode newNode =
              root.findPointerOrCreate(VfsUtilCore.urlToPath(urlAfter), 0, after);
          VirtualFilePointerImpl existingPointer = newNode.leaf;
          if (existingPointer != null) {
            // can happen when e.g. file renamed to the existing file
            // merge two pointers
            pointer.myNode = newNode;
          } else {
            newNode.associate(pointer, after);
          }
          newNode.incrementUsageCount(useCount);
        }
      }
    }

    VirtualFilePointer[] pointersToFireArray = toPointers(myPointersToFire);
    for (VirtualFilePointer pointer : pointersToFireArray) {
      ((VirtualFilePointerImpl) pointer).myNode.update();
    }

    for (EventDescriptor event : myEvents) {
      event.fireAfter();
    }

    if (pointersToFireArray.length != 0) {
      myBus.syncPublisher(VirtualFilePointerListener.TOPIC).validityChanged(pointersToFireArray);
    }

    myPointersToUpdateUrl = Collections.emptyList();
    myEvents = Collections.emptyList();
    myPointersToFire = Collections.emptyList();
    for (FilePointerPartNode root : myPointers.values()) {
      root.checkConsistency();
    }
  }
 @TestOnly
 public void assertPointersAreDisposed() {
   List<VirtualFilePointerImpl> pointers = new ArrayList<VirtualFilePointerImpl>();
   addAllPointers(pointers);
   try {
     for (VirtualFilePointerImpl pointer : pointers) {
       if (!myStoredPointers.contains(pointer)) {
         pointer.throwDisposalError("Virtual pointer hasn't been disposed: " + pointer);
       }
     }
   } finally {
     myStoredPointers.clear();
   }
 }
    @Override
    public void dispose() {
      synchronized (ourInstances) {
        ourInstances.remove(myParent);

        for (Object o : myCounts.keys()) {
          VirtualFilePointerImpl pointer = (VirtualFilePointerImpl) o;
          int disposeCount = myCounts.get(pointer);
          int after = pointer.myNode.incrementUsageCount(-disposeCount + 1);
          LOG.assertTrue(after > 0, after);
          pointer.dispose();
        }
      }
    }
  public synchronized void assertPointersDisposed() {
    for (Map.Entry<VirtualFilePointerListener, TreeMap<String, VirtualFilePointerImpl>> entry :
        myUrlToPointerMaps.entrySet()) {
      VirtualFilePointerListener listener = entry.getKey();
      TreeMap<String, VirtualFilePointerImpl> map = entry.getValue();
      for (VirtualFilePointerImpl pointer : map.values()) {
        myUrlToPointerMaps.clear();
        pointer.throwNotDisposedError("Not disposed pointer: listener=" + listener);
      }
    }

    synchronized (myContainers) {
      if (!myContainers.isEmpty()) {
        VirtualFilePointerContainerImpl container = myContainers.iterator().next();
        myContainers.clear();
        throw new RuntimeException("Not disposed container " + container);
      }
    }
  }
    @Override
    public void after(@NotNull final List<? extends VFileEvent> events) {
      cleanContainerCaches();

      if (myUrlsToUpdate == null) {
        return;
      }
      for (String url : myUrlsToUpdate) {
        synchronized (VirtualFilePointerManagerImpl.this) {
          for (TreeMap<String, VirtualFilePointerImpl> urlToPointer : myUrlToPointerMaps.values()) {
            VirtualFilePointerImpl pointer = urlToPointer.remove(url);
            if (pointer != null) {
              String path = VfsUtil.urlToPath(pointer.getUrl());
              urlToPointer.put(path, pointer);
            }
          }
        }
      }

      for (VirtualFilePointer pointer : myPointersToUpdate) {
        ((VirtualFilePointerImpl) pointer).update();
      }

      for (EventDescriptor event : myEvents) {
        event.fireAfter();
      }

      if (!myPointersToUpdate.isEmpty()) {
        VirtualFilePointer[] arr =
            myPointersToUpdate.toArray(new VirtualFilePointer[myPointersToUpdate.size()]);
        myBus.syncPublisher(VirtualFilePointerListener.TOPIC).validityChanged(arr);
      }

      myUrlsToUpdate = null;
      myEvents = null;
      myPointersToUpdate = null;
    }
 @Override
 public int hashCode() {
   return myPointer.hashCode();
 }
 @Override
 public String toString() {
   return "D:" + myPointer.toString();
 }
 @Override
 public void dispose() {
   myPointer.useCount -= disposeCount - 1;
   LOG.assertTrue(myPointer.useCount > 0);
   myPointer.dispose();
 }