How to use

setEnabled

method

in

org.eclipse.jdt.internal.ui.text.java.hover.JavadocHover$OpenDeclarationAction

  @Override
  public void inputChanged(Object newInput) {
    backAction.update();
    forwardAction.update();
    if (newInput == null) {
      selectionProvider.setSelection(new StructuredSelection());
    } else if (newInput instanceof BrowserInformationControlInput) {
      BrowserInformationControlInput input= (BrowserInformationControlInput) newInput;
      Object inputElement= input.getInputElement();
      selectionProvider.setSelection(new StructuredSelection(inputElement));
      boolean isJavaElementInput= inputElement instanceof IJavaElement;
      showInJavadocViewAction.setEnabled(isJavaElementInput);
      openDeclarationAction.setEnabled(isJavaElementInput);
    }
  }
};

  @Override
  public void inputChanged(Object newInput) {
    backAction.update();
    forwardAction.update();
    if (newInput == null) {
      selectionProvider.setSelection(new StructuredSelection());
    } else if (newInput instanceof BrowserInformationControlInput) {
      BrowserInformationControlInput input= (BrowserInformationControlInput) newInput;
      Object inputElement= input.getInputElement();
      selectionProvider.setSelection(new StructuredSelection(inputElement));
      boolean isJavaElementInput= inputElement instanceof IJavaElement;
      showInJavadocViewAction.setEnabled(isJavaElementInput);
      openDeclarationAction.setEnabled(isJavaElementInput);
    }
  }
};