Java Code Examples for com.intellij.openapi.vfs.VirtualFile#exists()

/**
 * Returns the target/classes/$configFile and null otherwise.
 * 
 * <p>
 * Using this file instead of using src/main/resources/$configFile gives the
 * capability to get the filtered value.
 * </p>
 * 
 * @return the target/classes/$configFile and null otherwise.
 */
private VirtualFile getConfigFile() {
	if (configFile != null && configFile.exists()) {
		return configFile;
	}
	if (javaProject.isLoaded()) {
		VirtualFile[] sourceRoots = ModuleRootManager.getInstance(javaProject).getSourceRoots();
		for (VirtualFile sourceRoot : sourceRoots) {
			VirtualFile file = sourceRoot.findFileByRelativePath(configFileName);
			if (file != null && file.exists()) {
				return file;
			}
		}
		return null;
	}
	return null;
}
 

private static void removeImlFile(final File imlFile) {
  final VirtualFile imlVirtualFile = VfsUtil.findFileByIoFile(imlFile, true);
  if (imlVirtualFile != null && imlVirtualFile.exists()) {
    ApplicationManager.getApplication()
        .runWriteAction(
            new Runnable() {
              @Override
              public void run() {
                try {
                  imlVirtualFile.delete(this);
                } catch (IOException e) {
                  logger.warn(
                      String.format(
                          "Could not delete file: %s, will try to continue anyway.",
                          imlVirtualFile.getPath()),
                      e);
                }
              }
            });
  }
}
 

/**
 *
 * @param document
 * @return null if not connection has happened, a future tracking the connection state otherwise
 * @throws IOException
 */
public @Nullable CompletableFuture<LanguageServer> connect(Document document) throws IOException {
    VirtualFile file = LSPIJUtils.getFile(document);

    if (file != null && file.exists()) {
        return connect(file, document);
    } else {
        URI uri = LSPIJUtils.toUri(document);
        if (uri != null) {
            return connect(uri, document);
        }
    }
    return null;
}
 

private static <T> Optional<T> readJsonFile(Path path, Class<T> cls) {
  VirtualFile virtualFile = LocalFileSystem.getInstance().findFileByIoFile(path.toFile());
  if (virtualFile != null && virtualFile.exists()) {
    try {
      String content = new String(virtualFile.contentsToByteArray());
      T parsed = new Gson().fromJson(content, cls);
      return Optional.of(parsed);
    }
    catch (Exception e) {
      LOG.warn("Failed to read and parse as json: " + path, e);
    }
  }
  return Optional.empty();
}
 

/**
 * Creates this file in the local filesystem with the given content.
 *
 * @param input an input stream to write into the file
 * @throws FileAlreadyExistsException if a resource with the same name already exists
 * @throws FileNotFoundException if the parent directory of this file does not exist
 */
private void createInternal(@Nullable InputStream input) throws IOException {
  IResource parent = getParent();

  VirtualFile parentFile = referencePoint.findVirtualFile(parent.getReferencePointRelativePath());

  if (parentFile == null || !parentFile.exists()) {
    throw new FileNotFoundException(
        "Could not create "
            + this
            + " as its parent folder "
            + parent
            + " does not exist or is not valid");
  }

  VirtualFile virtualFile = parentFile.findChild(getName());

  if (virtualFile != null && virtualFile.exists()) {
    throw new FileAlreadyExistsException(
        "Could not create "
            + this
            + " as a resource with the same name already exists: "
            + virtualFile);
  }

  parentFile.createChildData(this, getName());

  if (input != null) {
    setContents(input);
  }
}
 

private void filter(VFileEvent event, Set<String> uris) {
  VirtualFile file = event.getFile();
  if (file != null && file.exists() && "java".equalsIgnoreCase(file.getExtension())) {
    Module module = ProjectFileIndex.getInstance(getProject()).getModuleForFile(file);
    if (module != null && (event instanceof VFileCreateEvent || event instanceof VFileContentChangeEvent || event instanceof VFileDeleteEvent)) {
      uris.add(PsiUtilsImpl.getProjectURI(module));
    }
  }
}
 

/**
 * Opens an editor for the passed file.
 *
 * <p>If the editor is a text editor, it is also added to the pool of currently open editors and
 * {@link EditorManager#startEditor(Editor)} is called with it.
 *
 * <p><b>Note:</b> This does only work for shared resources.
 *
 * @param file the file to open
 * @param activate activate editor after opening
 * @return the editor for the given file, or <code>null</code> if the file does not exist or is
 *     not shared or can not be represented by a text editor
 */
public Editor openEditor(@NotNull IFile file, boolean activate) {
  if (!sarosSession.isShared(file)) {
    log.warn("Ignored open editor request for file " + file + " as it is not shared");

    return null;
  }

  VirtualFile virtualFile = VirtualFileConverter.convertToVirtualFile(file);

  if (virtualFile == null || !virtualFile.exists()) {
    log.warn(
        "Could not open Editor for file "
            + file
            + " as a matching virtual file does not exist or could not be found");

    return null;
  }

  Project project = ((IntellijReferencePoint) file.getReferencePoint()).getProject();

  Editor editor = ProjectAPI.openEditor(project, virtualFile, activate);

  if (editor == null) {
    log.debug("Ignoring non-text editor for file " + virtualFile);

    return null;
  }

  manager.startEditor(editor);
  editorPool.add(file, editor);

  log.debug("Opened Editor " + editor + " for file " + virtualFile);

  return editor;
}
 

public void contentsChanged(@NotNull VirtualFileEvent event) {
            VirtualFile confFile = findPathInWebDir(settings.configFilePath);
            if (confFile == null || !confFile.exists() || !event.getFile().equals(confFile)) {
                return;
            }
            LOG.debug("RequireConfigVfsListener contentsChanged");
//            RequirejsProjectComponent.this.project.getComponent(RequirejsProjectComponent.class).parseRequirejsConfig();
            RequirejsProjectComponent.this.parseRequirejsConfig();
        }
 

public VirtualFile getFile() {
  String fileName = getPath();
  if (fileName == null) {
    return parent != null ? parent.getFile() : null;
  }

  fileName = InspectorService.fromSourceLocationUri(fileName, project);

  final VirtualFile virtualFile = LocalFileSystem.getInstance().findFileByPath(fileName);
  if (virtualFile != null && !virtualFile.exists()) {
    return null;
  }
  return virtualFile;
}
 

/**
 * 正则二次判断是否存在Freeline classpath
 *
 * @param file
 * @return
 */
public static boolean regularExistFreelineClassPath(VirtualFile file) {
    try {
        if (file.exists()) {
            String content = FileUtils.readFileToString(new File(file.getPath()));
            Matcher matcher = PATTERN_CLASSPATH.matcher(content);
            return matcher.find();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return false;
}
 

@Nullable
@Override
protected ValidationInfo doValidate() {
  VirtualFile selectedFile = fileTextField.getSelectedFile();
  if (selectedFile == null || !selectedFile.exists()) {
    return new ValidationInfo("File does not exist", fileTextField.getField());
  } else if (!selectedFile.isDirectory()) {
    return new ValidationInfo("File is not a directory", fileTextField.getField());
  }

  WorkspacePath workspacePath =
      workspacePathResolver.getWorkspacePath(new File(selectedFile.getPath()));
  if (workspacePath == null) {
    return new ValidationInfo("File is not in workspace", fileTextField.getField());
  }

  if (Blaze.getBuildSystem(project) == BuildSystem.Blaze && workspacePath.isWorkspaceRoot()) {
    return new ValidationInfo(
        String.format(
            "Cannot add the workspace root '%s' to the project.\n"
                + "This will destroy performance.",
            selectedFile.getPath()));
  }

  ImportRoots importRoots = ImportRoots.builder(project).add(projectView).build();
  if (importRoots.containsWorkspacePath(workspacePath)) {
    return new ValidationInfo("This directory is already included in your project");
  }

  return null;
}
 

@Nullable
@Override
protected ValidationInfo doValidate() {
  VirtualFile selectedFile = fileTextField.getSelectedFile();
  if (selectedFile == null || !selectedFile.exists()) {
    return new ValidationInfo("File does not exist", fileTextField.getField());
  } else if (selectedFile.isDirectory()) {
    return new ValidationInfo("Directories can not be opened", fileTextField.getField());
  } else {
    return null;
  }
}
 

@NotNull
public static HaxelibMetadata load(@NotNull VirtualFile libRoot) {
  String mdfile = HaxeFileUtil.joinPath(libRoot.getUrl(), "haxelib.json");
  VirtualFile metadatafile = VirtualFileManager.getInstance().findFileByUrl(mdfile);
  if (null == metadatafile || !metadatafile.exists()) {
    return EMPTY_METADATA;
  }
  return new HaxelibMetadata(metadatafile);
}
 

public VirtualFile getFile() {
  String fileName = getPath();
  if (fileName == null) {
    return parent != null ? parent.getFile() : null;
  }

  fileName = InspectorService.fromSourceLocationUri(fileName, project);

  final VirtualFile virtualFile = LocalFileSystem.getInstance().findFileByPath(fileName);
  if (virtualFile != null && !virtualFile.exists()) {
    return null;
  }
  return virtualFile;
}
 

@Nullable
private static VirtualFile findAndroidModuleFile(@NotNull VirtualFile baseDir, String flutterModuleName) {
  baseDir.refresh(false, false);
  for (String name : asList(flutterModuleName + "_android.iml", "android.iml")) {
    final VirtualFile candidate = baseDir.findChild(name);
    if (candidate != null && candidate.exists()) {
      return candidate;
    }
  }
  return null;
}
 

@Nullable
private static VirtualFile findAndroidModuleFile(@NotNull VirtualFile baseDir, String flutterModuleName) {
  baseDir.refresh(false, false);
  for (String name : asList(flutterModuleName + "_android.iml", "android.iml")) {
    final VirtualFile candidate = baseDir.findChild(name);
    if (candidate != null && candidate.exists()) {
      return candidate;
    }
  }
  return null;
}
 

/**
 * Returns a document for the given file.
 *
 * @param virtualFile the <code>VirtualFile</code> for which the document is requested
 * @return a <code>Document</code> for the given file or <code>null</code> if the file does not
 *     exist, could not be read, is a directory, or is to large
 */
@Nullable
public static Document getDocument(@NotNull final VirtualFile virtualFile) {
  if (!virtualFile.exists()) {
    return null;
  }

  return FilesystemRunner.runReadAction(() -> fileDocumentManager.getDocument(virtualFile));
}
 

private void undoPendingChanges(final List<FilePath> localPaths,
                                final List<VcsException> errors,
                                @NotNull final RollbackProgressListener listener) {
    logger.info("undoPendingChanges started");
    try {
        List<TfsPath> localFiles = localPaths.stream()
                .map(TfsFileUtil::createLocalPath)
                .collect(Collectors.toList());

        // Call the undo command synchronously
        final ServerContext context = vcs.getServerContext(true);
        final List<TfsLocalPath> filesUndone = TfvcClient.getInstance(project).undoLocalChanges(context, localFiles);

        // Trigger the accept callback and build up our refresh list
        final List<VirtualFile> refresh = new ArrayList<VirtualFile>(filesUndone.size());
        for (final TfsLocalPath path : filesUndone) {
            // Call the accept method on the listener to indicate progress
            final File fileUndone = new File(path.getPath());
            listener.accept(fileUndone);

            // Add the parent folder of the file to our refresh list
            final VirtualFile file = LocalFileSystem.getInstance().findFileByIoFile(fileUndone);
            final VirtualFile parent = file != null ? file.getParent() : null;
            if (parent != null && parent.exists()) {
                refresh.add(file);
            }
        }

        // Refresh all the folders that changed
        TfsFileUtil.refreshAndMarkDirty(project, refresh, true);
    } catch (final Throwable e) {
        logger.warn("undoPendingChanges: Errors caught: " + e.getMessage(), e);
        errors.add(new VcsException("Cannot undo pending changes", e));
    }
    logger.info("undoPendingChanges ended");
}
 

@Override
public boolean exists(File file) {
  VirtualFile vf = getVirtualFile(file);
  return vf != null && vf.exists();
}
 

public static boolean exists(@Nullable VirtualFile file) {
  return file != null && file.exists();
}