Java Ref.isNull方法代碼示例

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
@Nullable
private static String getCurrentFileRevisionHash(@NotNull final Project project, @NotNull final VirtualFile file) {
  final Ref<GitRevisionNumber> ref = new Ref<GitRevisionNumber>();
  ProgressManager.getInstance().run(new Task.Modal(project, "Getting last revision", true) {
    @Override
    public void run(@NotNull ProgressIndicator indicator) {
      try {
        ref.set((GitRevisionNumber)GitHistoryUtils.getCurrentRevision(project, VcsUtil.getFilePath(file), "HEAD"));
      }
      catch (VcsException e) {
        LOG.warn(e);
      }
    }

    @Override
    public void onCancel() {
      throw new ProcessCanceledException();
    }
  });
  if (ref.isNull()) return null;
  return ref.get().getRev();
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
@Override
public void actionPerformed(AnActionEvent e) {
  final MyLocallyDeletedChecker locallyDeletedChecker = new MyLocallyDeletedChecker(e);
  if (! locallyDeletedChecker.isEnabled()) return;

  final String markText = SvnBundle.message("action.mark.tree.conflict.resolved.confirmation.title");
  final Project project = locallyDeletedChecker.getProject();
  final int result = Messages.showYesNoDialog(project,
                                              SvnBundle.message("action.mark.tree.conflict.resolved.confirmation.text"), markText,
                                              Messages.getQuestionIcon());
  if (result == Messages.YES) {
    final Ref<VcsException> exception = new Ref<VcsException>();
    ProgressManager
      .getInstance().run(new Task.Backgroundable(project, markText, true, BackgroundFromStartOption.getInstance()) {
      public void run(@NotNull ProgressIndicator indicator) {
        resolveLocallyDeletedTextConflict(locallyDeletedChecker, exception);
      }
    });
    if (! exception.isNull()) {
      AbstractVcsHelper.getInstance(project).showError(exception.get(), markText);
    }
  }
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
private static String serializeUrl(final String url, final Ref<Boolean> withUserInfo) {
  if (Boolean.FALSE.equals(withUserInfo.get())) {
    return url;
  }
  try {
    final SVNURL svnurl = SVNURL.parseURIEncoded(url);
    if (withUserInfo.isNull()) {
      final String userInfo = svnurl.getUserInfo();
      withUserInfo.set((userInfo != null) && (userInfo.length() > 0));
    }
    if (withUserInfo.get()) {
      return SVNURL.create(svnurl.getProtocol(), null, svnurl.getHost(), SvnUtil.resolvePort(svnurl), svnurl.getURIEncodedPath(), true)
        .toString();
    }
  }
  catch (SVNException e) {
    //
  }
  return url;
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
public ChangeRange revert(ChangeRange reverse) throws IOException {
  final Ref<Long> first = new Ref<Long>();
  final Ref<Long> last = new Ref<Long>();
  LocalHistoryFacade.Listener l = new LocalHistoryFacade.Listener() {
    public void changeAdded(Change c) {
      if (first.isNull()) first.set(c.getId());
      last.set(c.getId());
    }
  };
  myVcs.addListener(l, null);
  try {
    myVcs.accept(new UndoChangeRevertingVisitor(myGateway, myToChangeId, myFromChangeId));
  }
  catch (UndoChangeRevertingVisitor.RuntimeIOException e) {
    throw (IOException)e.getCause();
  }
  finally {
    myVcs.removeListener(l);
  }

  if (reverse != null) {
    if (first.isNull()) first.set(reverse.myFromChangeId);
    if (last.isNull()) last.set(reverse.myToChangeId);
  }
  return new ChangeRange(myGateway, myVcs, first.get(), last.get());
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
private static void setupEditorForInjectedLanguage() {
  if (myEditor != null) {
    final Ref<EditorWindow> editorWindowRef = new Ref<EditorWindow>();
    myEditor.getCaretModel().runForEachCaret(new CaretAction() {
      @Override
      public void perform(Caret caret) {
        Editor editor = InjectedLanguageUtil.getEditorForInjectedLanguageNoCommit(myEditor, myFile);
        if (caret == myEditor.getCaretModel().getPrimaryCaret() && editor instanceof EditorWindow) {
          editorWindowRef.set((EditorWindow)editor);
        }
      }
    });
    if (!editorWindowRef.isNull()) {
      myEditor = editorWindowRef.get();
      myFile = editorWindowRef.get().getInjectedFile();
    }
  }
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
protected static void doMkdir(final SVNURL url, final String comment, final Project project) {
  final Ref<Exception> exception = new Ref<Exception>();
  Runnable command = new Runnable() {
    public void run() {
      ProgressIndicator progress = ProgressManager.getInstance().getProgressIndicator();
      if (progress != null) {
        progress.setText(SvnBundle.message("progress.text.browser.creating", url.toString()));
      }
      SvnVcs vcs = SvnVcs.getInstance(project);
      SvnTarget target = SvnTarget.fromURL(url);
      try {
        vcs.getFactoryFromSettings().createBrowseClient().createDirectory(target, comment, false);
      }
      catch (VcsException e) {
        exception.set(e);
      }
    }
  };
  ProgressManager.getInstance().runProcessWithProgressSynchronously(command, SvnBundle.message("progress.text.create.remote.folder"), false, project);
  if (!exception.isNull()) {
    Messages.showErrorDialog(exception.get().getMessage(), SvnBundle.message("message.text.error"));
  }
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
private static boolean haveCustomComponents(final GuiEditor editor) {
  // quick & dirty check
  if (editor.isFormInvalid()) {
    return true;
  }
  final Ref<Boolean> result = new Ref<Boolean>();
  FormEditingUtil.iterate(editor.getRootContainer(), new FormEditingUtil.ComponentVisitor() {
    public boolean visit(final IComponent component) {
      if (component instanceof RadErrorComponent || !component.getComponentClassName().startsWith("javax.swing")) {
        result.set(Boolean.TRUE);
        return false;
      }
      return true;
    }
  });
  return !result.isNull();
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
private void showUsageView(@NotNull Project project, final UsageInfo[] usageInfos, @NotNull AnalysisScope scope) {
  final UsageTarget[] targets = UsageTarget.EMPTY_ARRAY;
  final Ref<Usage[]> convertUsagesRef = new Ref<Usage[]>();
  if (!ProgressManager.getInstance().runProcessWithProgressSynchronously(new Runnable() {
    @Override
    public void run() {
      ApplicationManager.getApplication().runReadAction(new Runnable() {
        @Override
        public void run() {
          convertUsagesRef.set(UsageInfo2UsageAdapter.convert(usageInfos));
        }
      });
    }
  }, "Preprocess Usages", true, project)) return;

  if (convertUsagesRef.isNull()) return;
  final Usage[] usages = convertUsagesRef.get();

  final UsageViewPresentation presentation = new UsageViewPresentation();
  presentation.setTabText("Infer Nullity Preview");
  presentation.setShowReadOnlyStatusAsRed(true);
  presentation.setShowCancelButton(true);
  presentation.setUsagesString(RefactoringBundle.message("usageView.usagesText"));

  final UsageView usageView = UsageViewManager.getInstance(project).showUsages(targets, usages, presentation, rerunFactory(project, scope));

  final Runnable refactoringRunnable = applyRunnable(project, new Computable<UsageInfo[]>() {
    @Override
    public UsageInfo[] compute() {
      final Set<UsageInfo> infos = UsageViewUtil.getNotExcludedUsageInfos(usageView);
      return infos.toArray(new UsageInfo[infos.size()]);
    }
  });

  String canNotMakeString = "Cannot perform operation.\nThere were changes in code after usages have been found.\nPlease perform operation search again.";

  usageView.addPerformOperationAction(refactoringRunnable, INFER_NULLITY_ANNOTATIONS, canNotMakeString, INFER_NULLITY_ANNOTATIONS, false);
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
private void showUsageView(@NotNull Project project, final UsageInfo[] usageInfos, @NotNull AnalysisScope scope) {
  final UsageTarget[] targets = UsageTarget.EMPTY_ARRAY;
  final Ref<Usage[]> convertUsagesRef = new Ref<Usage[]>();
  if (!ProgressManager.getInstance().runProcessWithProgressSynchronously(new Runnable() {
    @Override
    public void run() {
      ApplicationManager.getApplication().runReadAction(new Runnable() {
        @Override
        public void run() {
          convertUsagesRef.set(UsageInfo2UsageAdapter.convert(usageInfos));
        }
      });
    }
  }, "Preprocess usages", true, project)) return;

  if (convertUsagesRef.isNull()) return;
  final Usage[] usages = convertUsagesRef.get();

  final UsageViewPresentation presentation = new UsageViewPresentation();
  presentation.setTabText("Infer Nullity Preview");
  presentation.setShowReadOnlyStatusAsRed(true);
  presentation.setShowCancelButton(true);
  presentation.setUsagesString(RefactoringBundle.message("usageView.usagesText"));

  final UsageView usageView = UsageViewManager.getInstance(project).showUsages(targets, usages, presentation, rerunFactory(project, scope));

  final Runnable refactoringRunnable = applyRunnable(project, new Computable<UsageInfo[]>() {
    @Override
    public UsageInfo[] compute() {
      final Set<UsageInfo> infos = UsageViewUtil.getNotExcludedUsageInfos(usageView);
      return infos.toArray(new UsageInfo[infos.size()]);
    }
  });

  String canNotMakeString = "Cannot perform operation.\nThere were changes in code after usages have been found.\nPlease perform operation search again.";

  usageView.addPerformOperationAction(refactoringRunnable, INFER_NULLITY_ANNOTATIONS, canNotMakeString, INFER_NULLITY_ANNOTATIONS, false);
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
@Override
public PsiElement bindToElement(@NotNull final PsiElement element) throws IncorrectOperationException {
  final Ref<IncorrectOperationException> ref = new Ref<IncorrectOperationException>();
  PsiElement bindElement =
    referenceBindToElement(this, element, getSuperBindToElementFunction(ref), getSuperElementRenameFunction(ref));
  if (!ref.isNull()) {
    throw ref.get();
  }

  return bindElement;
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
public void performCopyFrom(final DirDiffElementImpl element) {
  final DiffElement<?> target = element.getTarget();
  if (target != null) {
    final String path = element.getParentNode().getPath();

    if (target instanceof BackgroundOperatingDiffElement) {
      final Ref<String> errorMessage = new Ref<String>();
      final Ref<DiffElement> diff = new Ref<DiffElement>();
      Runnable onFinish = new Runnable() {
        @Override
        public void run() {
          ApplicationManager.getApplication().assertIsDispatchThread();
          if (!myDisposed) {
            refreshElementAfterCopyFrom(element, diff.get());
            if (!errorMessage.isNull()) {
              reportException(errorMessage.get());
            }
          }
        }
      };
      ((BackgroundOperatingDiffElement)target).copyTo(mySrc, errorMessage, diff, onFinish, element.getSource(), path);
    }
    else {
      final AccessToken token = ApplicationManager.getApplication().acquireWriteActionLock(getClass());
      try {
        final DiffElement<?> diffElement = target.copyTo(mySrc, path);
        refreshElementAfterCopyFrom(element, diffElement);
      }
      finally {
        token.finish();
      }
    }
  }
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
public <V> V queueAndWaitTask(final Callable<V> task) throws Throwable {
  final Ref<V> resultRef = new Ref<V>();
  final Ref<Throwable> throwableRef = new Ref<Throwable>();

  final Semaphore taskSemaphore = new Semaphore();
  taskSemaphore.down();

  queueTask(new Runnable() {

    @Override
    public void run() {
      try {
        resultRef.set(task.call());
      }
      catch (Throwable e) {
        throwableRef.set(e);
        LOG.error(e);
      }
      finally {
        taskSemaphore.up();
      }
    }
  });

  taskSemaphore.waitFor();

  if (!throwableRef.isNull()) {
    throw throwableRef.get();
  }

  return resultRef.get();
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
public void release() {
  int line = getLine();
  if (line < 0) {
    return;
  }
  final Document document = getDocument();
  if (document == null) return;
  MarkupModelEx markup = (MarkupModelEx)DocumentMarkupModel.forDocument(document, myProject, true);
  final Document markupDocument = markup.getDocument();
  if (markupDocument.getLineCount() <= line) return;
  final int startOffset = markupDocument.getLineStartOffset(line);
  final int endOffset = markupDocument.getLineEndOffset(line);

  final Ref<RangeHighlighterEx> found = new Ref<RangeHighlighterEx>();
  markup.processRangeHighlightersOverlappingWith(startOffset, endOffset, new Processor<RangeHighlighterEx>() {
    @Override
    public boolean process(RangeHighlighterEx highlighter) {
      GutterMark renderer = highlighter.getGutterIconRenderer();
      if (renderer instanceof MyGutterIconRenderer && ((MyGutterIconRenderer)renderer).myBookmark == Bookmark.this) {
        found.set(highlighter);
        return false;
      }
      return true;
    }
  });
  if (!found.isNull()) found.get().dispose();
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
private void doImportProject() {
  AbstractExternalSystemSettings systemSettings = ExternalSystemApiUtil.getSettings(myProject, getExternalSystemId());
  final ExternalProjectSettings projectSettings = getCurrentExternalProjectSettings();
  projectSettings.setExternalProjectPath(getProjectPath());
  Set<ExternalProjectSettings> projects = ContainerUtilRt.newHashSet(systemSettings.getLinkedProjectsSettings());
  projects.remove(projectSettings);
  projects.add(projectSettings);
  systemSettings.setLinkedProjectsSettings(projects);

  final Ref<Couple<String>> error = Ref.create();
  ExternalSystemUtil.refreshProjects(
    new ImportSpecBuilder(myProject, getExternalSystemId())
      .use(ProgressExecutionMode.MODAL_SYNC)
      .callback(new ExternalProjectRefreshCallback() {
        @Override
        public void onSuccess(@Nullable final DataNode<ProjectData> externalProject) {
          if (externalProject == null) {
            System.err.println("Got null External project after import");
            return;
          }
          ServiceManager.getService(ProjectDataManager.class).importData(externalProject, myProject, true);
          System.out.println("External project was successfully imported");
        }

        @Override
        public void onFailure(@NotNull String errorMessage, @Nullable String errorDetails) {
          error.set(Couple.of(errorMessage, errorDetails));
        }
      })
  );

  if (!error.isNull()) {
    String failureMsg = "Import failed: " + error.get().first;
    if (StringUtil.isNotEmpty(error.get().second)) {
      failureMsg += "\nError details: \n" + error.get().second;
    }
    fail(failureMsg);
  }
}
 

import com.intellij.openapi.util.Ref; //導入方法依賴的package包/類
@NotNull
@Override
public PsiElementVisitor buildInternalVisitor(@NotNull final ProblemsHolder holder, final boolean isOnTheFly) {
  return new JavaElementVisitor() {
    @Override
    public void visitMethodCallExpression(final PsiMethodCallExpression expression) {
      final Project project = expression.getProject();
      final JavaPsiFacade facade = JavaPsiFacade.getInstance(project);

      final PsiReferenceExpression methodRef = expression.getMethodExpression();
      if (!GET_CHILDREN_METHOD_NAME.equals(methodRef.getReferenceName())) return;
      final PsiElement methodElement = methodRef.resolve();
      if (!(methodElement instanceof PsiMethod)) return;
      final PsiMethod method = (PsiMethod)methodElement;
      final PsiClass aClass = method.getContainingClass();
      final PsiClass virtualFileClass = facade.findClass(VIRTUAL_FILE_CLASS_NAME, GlobalSearchScope.allScope(project));
      if (!InheritanceUtil.isInheritorOrSelf(aClass, virtualFileClass, true)) return;

      final PsiMethod containingMethod = PsiTreeUtil.getParentOfType(expression, PsiMethod.class);
      if (containingMethod == null) return;
      final String containingMethodName = containingMethod.getName();
      final Ref<Boolean> result = Ref.create();
      containingMethod.accept(new JavaRecursiveElementVisitor() {
        @Override
        public void visitMethodCallExpression(final PsiMethodCallExpression expression2) {
          if (expression2 != expression &&
              containingMethodName.equals(expression2.getMethodExpression().getReferenceName()) &&
              expression2.resolveMethod() == containingMethod) {
            result.set(Boolean.TRUE);
          }
        }
      });

      if (!result.isNull()) {
        holder.registerProblem(expression, MESSAGE);
      }
    }
  };
}