public void testFileCaseChange() throws Exception {
    if (SystemInfo.isFileSystemCaseSensitive) {
      System.err.println("Ignored: case-insensitive FS required");
      return;
    }

    File top = createTempDirectory(false);
    File file = IoTestUtil.createTestFile(top, "file.txt", "test");
    File intermediate = new File(top, "_intermediate_");

    LocalFileSystem lfs = LocalFileSystem.getInstance();
    VirtualFile topDir = lfs.refreshAndFindFileByIoFile(top);
    assertNotNull(topDir);
    VirtualFile sourceFile = lfs.refreshAndFindFileByIoFile(file);
    assertNotNull(sourceFile);

    String newName = StringUtil.capitalize(file.getName());
    FileUtil.rename(file, intermediate);
    FileUtil.rename(intermediate, new File(top, newName));
    topDir.refresh(false, true);
    assertFalse(((VirtualDirectoryImpl) topDir).allChildrenLoaded());
    assertTrue(sourceFile.isValid());
    assertEquals(newName, sourceFile.getName());

    topDir.getChildren();
    newName = newName.toLowerCase();
    FileUtil.rename(file, intermediate);
    FileUtil.rename(intermediate, new File(top, newName));
    topDir.refresh(false, true);
    assertTrue(((VirtualDirectoryImpl) topDir).allChildrenLoaded());
    assertTrue(sourceFile.isValid());
    assertEquals(newName, sourceFile.getName());
  }
  public static void doTestPartialRefresh(@NotNull File top) throws IOException {
    File sub = IoTestUtil.createTestDir(top, "sub");
    File file = IoTestUtil.createTestFile(top, "sub.txt");
    LocalFileSystem lfs = LocalFileSystem.getInstance();
    NewVirtualFile topDir = (NewVirtualFile) lfs.refreshAndFindFileByIoFile(top);
    assertNotNull(topDir);
    NewVirtualFile subDir = (NewVirtualFile) lfs.refreshAndFindFileByIoFile(sub);
    assertNotNull(subDir);
    NewVirtualFile subFile = (NewVirtualFile) lfs.refreshAndFindFileByIoFile(file);
    assertNotNull(subFile);
    topDir.refresh(false, true);
    assertFalse(topDir.isDirty());
    assertFalse(subDir.isDirty());
    assertFalse(subFile.isDirty());

    subFile.markDirty();
    subDir.markDirty();
    assertTrue(topDir.isDirty());
    assertTrue(subFile.isDirty());
    assertTrue(subDir.isDirty());

    topDir.refresh(false, false);
    assertFalse(subFile.isDirty());
    assertTrue(subDir.isDirty()); // should stay unvisited after non-recursive refresh

    topDir.refresh(false, true);
    assertFalse(topDir.isDirty());
    assertFalse(subFile.isDirty());
    assertFalse(subDir.isDirty());
  }
  public void testCopyToPointDir() throws Exception {
    File top = createTempDirectory(false);
    File sub = IoTestUtil.createTestDir(top, "sub");
    File file = IoTestUtil.createTestFile(top, "file.txt", "hi there");

    LocalFileSystem lfs = LocalFileSystem.getInstance();
    VirtualFile topDir = lfs.refreshAndFindFileByIoFile(top);
    assertNotNull(topDir);
    VirtualFile sourceFile = lfs.refreshAndFindFileByIoFile(file);
    assertNotNull(sourceFile);
    VirtualFile parentDir = lfs.refreshAndFindFileByIoFile(sub);
    assertNotNull(parentDir);
    assertEquals(2, topDir.getChildren().length);

    try {
      sourceFile.copy(this, parentDir, ".");
      fail("Copying a file into a '.' path should have failed");
    } catch (IOException e) {
      System.out.println(e.getMessage());
    }

    topDir.refresh(false, true);
    assertTrue(topDir.exists());
    assertEquals(2, topDir.getChildren().length);
  }
  public void testHardLinks() throws Exception {
    if (!SystemInfo.isWindows && !SystemInfo.isUnix) {
      System.err.println(getName() + " skipped: " + SystemInfo.OS_NAME);
      return;
    }

    final boolean safeWrite = GeneralSettings.getInstance().isUseSafeWrite();
    final File dir = FileUtil.createTempDirectory("hardlinks.", ".dir", false);
    final SafeWriteRequestor requestor = new SafeWriteRequestor() {};
    try {
      GeneralSettings.getInstance().setUseSafeWrite(false);

      final File targetFile = new File(dir, "targetFile");
      assertTrue(targetFile.createNewFile());
      final File hardLinkFile =
          IoTestUtil.createHardLink(targetFile.getAbsolutePath(), "hardLinkFile");

      final VirtualFile file = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(targetFile);
      assertNotNull(file);
      file.setBinaryContent("hello".getBytes("UTF-8"), 0, 0, requestor);
      assertTrue(file.getLength() > 0);

      final VirtualFile check =
          LocalFileSystem.getInstance().refreshAndFindFileByIoFile(hardLinkFile);
      assertNotNull(check);
      assertEquals(file.getLength(), check.getLength());
      assertEquals("hello", VfsUtilCore.loadText(check));
    } finally {
      GeneralSettings.getInstance().setUseSafeWrite(safeWrite);
      FileUtil.delete(dir);
    }
  }
  public void testChildrenAccessedButNotCached() throws Exception {
    File dir = createTempDirectory(false);
    ManagingFS managingFS = ManagingFS.getInstance();

    VirtualFile vFile =
        LocalFileSystem.getInstance()
            .refreshAndFindFileByPath(dir.getPath().replace(File.separatorChar, '/'));
    assertNotNull(vFile);
    assertFalse(managingFS.areChildrenLoaded(vFile));
    assertFalse(managingFS.wereChildrenAccessed(vFile));

    File child = new File(dir, "child");
    boolean created = child.createNewFile();
    assertTrue(created);

    File subdir = new File(dir, "subdir");
    boolean subdirCreated = subdir.mkdir();
    assertTrue(subdirCreated);

    File subChild = new File(subdir, "subdir");
    boolean subChildCreated = subChild.createNewFile();
    assertTrue(subChildCreated);

    VirtualFile childVFile =
        LocalFileSystem.getInstance()
            .refreshAndFindFileByPath(child.getPath().replace(File.separatorChar, '/'));
    assertNotNull(childVFile);
    assertFalse(managingFS.areChildrenLoaded(vFile));
    assertTrue(managingFS.wereChildrenAccessed(vFile));

    VirtualFile subdirVFile =
        LocalFileSystem.getInstance()
            .refreshAndFindFileByPath(subdir.getPath().replace(File.separatorChar, '/'));
    assertNotNull(subdirVFile);
    assertFalse(managingFS.areChildrenLoaded(subdirVFile));
    assertFalse(managingFS.wereChildrenAccessed(subdirVFile));
    assertFalse(managingFS.areChildrenLoaded(vFile));
    assertTrue(managingFS.wereChildrenAccessed(vFile));

    vFile.getChildren();
    assertTrue(managingFS.areChildrenLoaded(vFile));
    assertTrue(managingFS.wereChildrenAccessed(vFile));
    assertFalse(managingFS.areChildrenLoaded(subdirVFile));
    assertFalse(managingFS.wereChildrenAccessed(subdirVFile));

    VirtualFile subChildVFile =
        LocalFileSystem.getInstance()
            .refreshAndFindFileByPath(subChild.getPath().replace(File.separatorChar, '/'));
    assertNotNull(subChildVFile);
    assertTrue(managingFS.areChildrenLoaded(vFile));
    assertTrue(managingFS.wereChildrenAccessed(vFile));
    assertFalse(managingFS.areChildrenLoaded(subdirVFile));
    assertTrue(managingFS.wereChildrenAccessed(subdirVFile));
  }
  public void testUnicodeNames() throws Exception {
    final File dirFile = createTempDirectory();
    final String name = "te\u00dft123123123.txt";
    final File childFile = new File(dirFile, name);
    boolean created = childFile.createNewFile();
    assert created || childFile.exists() : childFile;

    final VirtualFile dir = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(dirFile);
    assertNotNull(dir);

    final VirtualFile child = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(childFile);
    assertNotNull(child);

    assertTrue(childFile.delete());
  }
  public void testRefreshSeesLatestDirectoryContents() throws Exception {
    File testDir = FileUtil.createTempDirectory("RefreshChildrenTest." + getName(), null);
    String content = "";
    FileUtil.writeToFile(new File(testDir, "Foo.java"), content);

    LocalFileSystem local = LocalFileSystem.getInstance();
    VirtualFile virtualDir = local.findFileByIoFile(testDir);
    assert virtualDir != null : testDir;
    virtualDir.getChildren();
    virtualDir.refresh(false, true);
    checkChildCount(virtualDir, 1);

    FileUtil.writeToFile(new File(testDir, "Bar.java"), content);
    virtualDir.refresh(false, true);
    checkChildCount(virtualDir, 2);
  }
  public void testWindowsHiddenDirectory() throws Exception {
    if (!SystemInfo.isWindows) {
      System.err.println(getName() + " skipped: " + SystemInfo.OS_NAME);
      return;
    }

    File file = new File("C:\\Documents and Settings\\desktop.ini");
    if (!file.exists()) {
      System.err.println(getName() + " skipped: missing " + file);
      return;
    }

    String parent = FileUtil.toSystemIndependentName(file.getParent());
    VirtualDirectoryImpl.allowRootAccess(parent);
    try {
      VirtualFile virtualFile = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(file);
      assertNotNull(virtualFile);

      NewVirtualFileSystem fs = (NewVirtualFileSystem) virtualFile.getFileSystem();
      FileAttributes attributes = fs.getAttributes(virtualFile);
      assertNotNull(attributes);
      assertEquals(FileAttributes.Type.FILE, attributes.type);
      assertEquals(FileAttributes.HIDDEN, attributes.flags);
    } finally {
      VirtualDirectoryImpl.disallowRootAccess(parent);
    }
  }
  public void testBadFileName() throws Exception {
    if (!SystemInfo.isUnix) {
      System.err.println(getName() + " skipped: " + SystemInfo.OS_NAME);
      return;
    }

    final File dir = FileUtil.createTempDirectory("test.", ".dir");
    final File file = FileUtil.createTempFile(dir, "test\\", "\\txt", true);

    final VirtualFile vDir = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(dir);
    assertNotNull(vDir);
    assertEquals(0, vDir.getChildren().length);

    ((VirtualFileSystemEntry) vDir).markDirtyRecursively();
    vDir.refresh(false, true);

    final VirtualFile vFile = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(file);
    assertNull(vFile);
  }
  public void testCopyFile() throws Exception {
    File fromDir = createTempDirectory();
    File toDir = createTempDirectory();

    VirtualFile fromVDir =
        LocalFileSystem.getInstance()
            .findFileByPath(fromDir.getPath().replace(File.separatorChar, '/'));
    VirtualFile toVDir =
        LocalFileSystem.getInstance()
            .findFileByPath(toDir.getPath().replace(File.separatorChar, '/'));
    assertNotNull(fromVDir);
    assertNotNull(toVDir);
    final VirtualFile fileToCopy = fromVDir.createChildData(this, "temp_file");
    final byte[] byteContent = {0, 1, 2, 3};
    fileToCopy.setBinaryContent(byteContent);
    final String newName = "new_temp_file";
    final VirtualFile copy = fileToCopy.copy(this, toVDir, newName);
    assertEquals(newName, copy.getName());
    assertTrue(Arrays.equals(byteContent, copy.contentsToByteArray()));
  }
  public void testCopyDir() throws Exception {
    File fromDir = createTempDirectory();
    File toDir = createTempDirectory();

    VirtualFile fromVDir =
        LocalFileSystem.getInstance()
            .findFileByPath(fromDir.getPath().replace(File.separatorChar, '/'));
    VirtualFile toVDir =
        LocalFileSystem.getInstance()
            .findFileByPath(toDir.getPath().replace(File.separatorChar, '/'));
    assertNotNull(fromVDir);
    assertNotNull(toVDir);
    final VirtualFile dirToCopy = fromVDir.createChildDirectory(this, "dir");
    final VirtualFile file = dirToCopy.createChildData(this, "temp_file");
    file.setBinaryContent(new byte[] {0, 1, 2, 3});
    final String newName = "dir";
    final VirtualFile dirCopy = dirToCopy.copy(this, toVDir, newName);
    assertEquals(newName, dirCopy.getName());
    PlatformTestUtil.assertDirectoriesEqual(toVDir, fromVDir);
  }
  public static void doTestInterruptedRefresh(@NotNull File top) throws Exception {
    File sub = IoTestUtil.createTestDir(top, "sub");
    File subSub = IoTestUtil.createTestDir(sub, "sub_sub");
    File file1 = IoTestUtil.createTestFile(sub, "sub_file_to_stop_at");
    File file2 = IoTestUtil.createTestFile(subSub, "sub_sub_file");
    LocalFileSystem lfs = LocalFileSystem.getInstance();
    NewVirtualFile topDir = (NewVirtualFile) lfs.refreshAndFindFileByIoFile(top);
    assertNotNull(topDir);
    NewVirtualFile subFile1 = (NewVirtualFile) lfs.refreshAndFindFileByIoFile(file1);
    assertNotNull(subFile1);
    NewVirtualFile subFile2 = (NewVirtualFile) lfs.refreshAndFindFileByIoFile(file2);
    assertNotNull(subFile2);
    topDir.refresh(false, true);
    assertFalse(topDir.isDirty());
    assertFalse(subFile1.isDirty());
    assertFalse(subFile2.isDirty());

    try {
      subFile1.markDirty();
      subFile2.markDirty();
      RefreshWorker.setCancellingCondition(
          new Function<VirtualFile, Boolean>() {
            @Override
            public Boolean fun(VirtualFile file) {
              return "sub_file_to_stop_at".equals(file.getName());
            }
          });
      topDir.refresh(false, true);
      // should remain dirty after aborted refresh
      assertTrue(subFile1.isDirty());
      assertTrue(subFile2.isDirty());

      RefreshWorker.setCancellingCondition(null);
      topDir.refresh(false, true);
      assertFalse(topDir.isDirty());
      assertFalse(subFile1.isDirty());
      assertFalse(subFile2.isDirty());
    } finally {
      RefreshWorker.setCancellingCondition(null);
    }
  }
  public void testGetAttributesConvertsToAbsolute() throws Exception {
    PersistentFS fs = PersistentFS.getInstance();
    LocalFileSystem lfs = LocalFileSystem.getInstance();
    NewVirtualFile fakeRoot = fs.findRoot("", lfs);
    assertNotNull(fakeRoot);
    File userDir = new File(System.getProperty("user.dir"));
    File[] files = userDir.listFiles();
    File fileToQuery;
    if (files != null && files.length != 0) {
      fileToQuery = files[0];
    } else if (userDir.isDirectory()) {
      fileToQuery = FileUtil.createTempFile(userDir, getTestName(false), "", true);
      myFilesToDelete.add(fileToQuery);
    } else {
      // can't test
      return;
    }

    FileAttributes attributes =
        lfs.getAttributes(new FakeVirtualFile(fakeRoot, fileToQuery.getName()));
    assertNull(attributes);

    attributes = lfs.getAttributes(new FakeVirtualFile(fakeRoot, "windows"));
    assertNull(attributes);
    attributes = lfs.getAttributes(new FakeVirtualFile(fakeRoot, "usr"));
    assertNull(attributes);
    attributes = lfs.getAttributes(new FakeVirtualFile(fakeRoot, "Users"));
    assertNull(attributes);
  }
  public void testFindRoot() throws IOException {
    VirtualFile root = LocalFileSystem.getInstance().findFileByPath("wrong_path");
    assertNull(root);

    VirtualFile root2;
    if (SystemInfo.isWindows) {
      root = LocalFileSystem.getInstance().findFileByPath("\\\\unit-133");
      assertNotNull(root);
      root2 = LocalFileSystem.getInstance().findFileByPath("//UNIT-133");
      assertNotNull(root2);
      assertEquals(String.valueOf(root2), root, root2);
      RefreshQueue.getInstance().processSingleEvent(new VFileDeleteEvent(this, root, false));

      root = LocalFileSystem.getInstance().findFileByIoFile(new File("\\\\unit-133"));
      assertNotNull(root);
      RefreshQueue.getInstance().processSingleEvent(new VFileDeleteEvent(this, root, false));

      if (new File("c:").exists()) {
        root = LocalFileSystem.getInstance().findFileByPath("c:");
        assertNotNull(root);
        assertEquals("C:/", root.getPath());

        root2 = LocalFileSystem.getInstance().findFileByPath("C:\\");
        assertEquals(String.valueOf(root2), root, root2);
      }
    } else if (SystemInfo.isUnix) {
      root = LocalFileSystem.getInstance().findFileByPath("/");
      assertNotNull(root);
      assertEquals(root.getPath(), "/");
    }

    root = LocalFileSystem.getInstance().findFileByPath("");
    assertNotNull(root);

    File jarFile = IoTestUtil.createTestJar();
    root = VirtualFileManager.getInstance().findFileByUrl("jar://" + jarFile.getPath() + "!/");
    assertNotNull(root);

    root2 =
        VirtualFileManager.getInstance()
            .findFileByUrl("jar://" + jarFile.getPath().replace(File.separator, "//") + "!/");
    assertEquals(String.valueOf(root2), root, root2);

    if (!SystemInfo.isFileSystemCaseSensitive) {
      root2 =
          VirtualFileManager.getInstance()
              .findFileByUrl("jar://" + jarFile.getPath().toUpperCase(Locale.US) + "!/");
      assertEquals(String.valueOf(root2), root, root2);
    }
  }
  public void testRefreshAndFindFile() throws Exception {
    File dir = createTempDirectory();

    VirtualFile vFile =
        LocalFileSystem.getInstance()
            .refreshAndFindFileByPath(dir.getPath().replace(File.separatorChar, '/'));
    assertNotNull(vFile);
    vFile.getChildren();

    for (int i = 0; i < 100; i++) {
      File subdir = new File(dir, "a" + i);
      assertTrue(subdir.mkdir());
    }

    File subdir = new File(dir, "aaa");
    assertTrue(subdir.mkdir());

    VirtualFile file =
        LocalFileSystem.getInstance()
            .refreshAndFindFileByPath(subdir.getPath().replace(File.separatorChar, '/'));
    assertNotNull(file);
  }
  public void testFileLength() throws Exception {
    File file = FileUtil.createTempFile("test", "txt");
    FileUtil.writeToFile(file, "hello");
    VirtualFile virtualFile = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(file);
    assertNotNull(virtualFile);
    String s = VfsUtilCore.loadText(virtualFile);
    assertEquals("hello", s);
    assertEquals(5, virtualFile.getLength());

    FileUtil.writeToFile(file, "new content");
    ((PersistentFSImpl) PersistentFS.getInstance()).cleanPersistedContents();
    s = VfsUtilCore.loadText(virtualFile);
    assertEquals("new content", s);
    assertEquals(11, virtualFile.getLength());
  }
  public void testSingleFileRootRefresh() throws Exception {
    File file = FileUtil.createTempFile("test.", ".txt");
    VirtualFile virtualFile = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(file);
    assertNotNull(virtualFile);
    assertTrue(virtualFile.exists());
    assertTrue(virtualFile.isValid());

    virtualFile.refresh(false, false);
    assertFalse(((VirtualFileSystemEntry) virtualFile).isDirty());

    FileUtil.delete(file);
    assertFalse(file.exists());
    virtualFile.refresh(false, false);
    assertFalse(virtualFile.exists());
    assertFalse(virtualFile.isValid());
  }
  public void testSymlinkTargetBlink() throws Exception {
    if (!SystemInfo.areSymLinksSupported) {
      System.err.println("Ignored: symlinks not supported");
      return;
    }

    File top = createTempDirectory(true);
    File target = IoTestUtil.createTestDir(top, "target");
    File link = IoTestUtil.createSymLink(target.getPath(), top.getPath() + "/link");

    LocalFileSystem lfs = LocalFileSystem.getInstance();
    VirtualFile vTop = lfs.refreshAndFindFileByIoFile(top);
    assertNotNull(vTop);
    assertTrue(vTop.isValid());
    VirtualFile vTarget = lfs.refreshAndFindFileByIoFile(target);
    assertNotNull(vTarget);
    assertTrue(vTarget.isValid());
    VirtualFile vLink = lfs.refreshAndFindFileByIoFile(link);
    assertNotNull(vLink);
    assertTrue(vLink.isValid());
    assertTrue(vLink.isDirectory());

    FileUtil.delete(target);
    vTop.refresh(false, true);
    assertFalse(vTarget.isValid());
    assertFalse(vLink.isValid());
    vLink = lfs.refreshAndFindFileByIoFile(link);
    assertNotNull(vLink);
    assertTrue(vLink.isValid());
    assertFalse(vLink.isDirectory());

    FileUtil.createDirectory(target);
    vTop.refresh(false, true);
    assertFalse(vLink.isValid());
    vLink = lfs.refreshAndFindFileByIoFile(link);
    assertNotNull(vLink);
    assertTrue(vLink.isValid());
    assertTrue(vLink.isDirectory());
  }
Beispiel #19
0
  @Override
  @Nullable
  public VirtualFileSystemEntry findRoot(
      @NotNull String basePath, @NotNull NewVirtualFileSystem fs) {
    if (basePath.isEmpty()) {
      LOG.error("Invalid root, fs=" + fs);
      return null;
    }

    String rootUrl = normalizeRootUrl(basePath, fs);

    myRootsLock.readLock().lock();
    try {
      VirtualFileSystemEntry root = myRoots.get(rootUrl);
      if (root != null) return root;
    } finally {
      myRootsLock.readLock().unlock();
    }

    final VirtualFileSystemEntry newRoot;
    int rootId = FSRecords.findRootRecord(rootUrl);

    VfsData.Segment segment = VfsData.getSegment(rootId, true);
    VfsData.DirectoryData directoryData = new VfsData.DirectoryData();
    if (fs instanceof ArchiveFileSystem) {
      String parentPath =
          basePath.substring(0, basePath.indexOf(ArchiveFileSystem.ARCHIVE_SEPARATOR));
      VirtualFile parentFile = LocalFileSystem.getInstance().findFileByPath(parentPath);
      if (parentFile == null) return null;
      FileType type = FileTypeRegistry.getInstance().getFileTypeByFileName(parentFile.getName());
      if (!(type instanceof ArchiveFileType)) return null;
      newRoot = new ArchiveRoot(fs, rootId, segment, directoryData, parentFile);
    } else {
      newRoot = new FsRoot(fs, rootId, segment, directoryData, basePath);
    }

    FileAttributes attributes =
        fs.getAttributes(
            new StubVirtualFile() {
              @NotNull
              @Override
              public String getPath() {
                return newRoot.getPath();
              }

              @Nullable
              @Override
              public VirtualFile getParent() {
                return null;
              }
            });
    if (attributes == null || !attributes.isDirectory()) {
      return null;
    }

    boolean mark = false;

    myRootsLock.writeLock().lock();
    try {
      VirtualFileSystemEntry root = myRoots.get(rootUrl);
      if (root != null) return root;

      VfsData.initFile(rootId, segment, -1, directoryData);
      mark = writeAttributesToRecord(rootId, 0, newRoot, fs, attributes);

      myRoots.put(rootUrl, newRoot);
      myRootsById.put(rootId, newRoot);
    } finally {
      myRootsLock.writeLock().unlock();
    }

    if (!mark && attributes.lastModified != FSRecords.getTimestamp(rootId)) {
      newRoot.markDirtyRecursively();
    }

    LOG.assertTrue(
        rootId == newRoot.getId(),
        "root=" + newRoot + " expected=" + rootId + " actual=" + newRoot.getId());

    return newRoot;
  }
  @Override
  @Nullable
  public VirtualFileSystemEntry findRoot(
      @NotNull String basePath, @NotNull NewVirtualFileSystem fs) {
    String rootUrl = normalizeRootUrl(basePath, fs);
    boolean isFakeRoot = basePath.isEmpty();
    VirtualFileSystemEntry root;

    myRootsLock.readLock().lock();
    try {
      root = isFakeRoot ? mySuperRoot : myRoots.get(rootUrl);
      if (root != null) return root;
    } finally {
      myRootsLock.readLock().unlock();
    }

    myRootsLock.writeLock().lock();
    try {
      root = isFakeRoot ? mySuperRoot : myRoots.get(rootUrl);
      if (root != null) return root;

      int rootId = FSRecords.findRootRecord(rootUrl);
      root = myRootsById.get(rootId);
      if (root != null) return root;

      if (isFakeRoot) {
        // fake super-root
        root = new FakeRoot(fs, rootId);
      } else if (fs instanceof JarFileSystem) {
        // optimization: for jar roots do not store base path in the myName field, use local FS
        // file's getPath()
        String parentPath = basePath.substring(0, basePath.indexOf(JarFileSystem.JAR_SEPARATOR));
        VirtualFile parentLocalFile = LocalFileSystem.getInstance().findFileByPath(parentPath);
        if (parentLocalFile == null) return null;

        // check one more time since the findFileByPath could have created the root (by reentering
        // the findRoot)
        root = myRoots.get(rootUrl);
        if (root != null) return root;
        root = myRootsById.get(rootId);
        if (root != null) return root;

        root = new JarRoot(fs, rootId, parentLocalFile);
      } else {
        root = new FsRoot(fs, rootId, basePath);
      }

      if (isFakeRoot) {
        mySuperRoot = root;
      } else {
        FileAttributes attributes = fs.getAttributes(root);
        if (attributes == null || !attributes.isDirectory()) {
          return null;
        }
        final boolean newRoot = writeAttributesToRecord(rootId, 0, root, fs, attributes);
        if (!newRoot && attributes.lastModified != FSRecords.getTimestamp(rootId)) {
          root.markDirtyRecursively();
        }

        myRoots.put(rootUrl, root);
        myRootsById.put(rootId, root);

        if (rootId != root.getId()) throw new AssertionError();
      }

      return root;
    } finally {
      myRootsLock.writeLock().unlock();
    }
  }