protected IResource[] checkOverwriteOfDirtyResources(
      IResource[] resources, IProgressMonitor monitor) throws CVSException, InterruptedException {
    List dirtyResources = new ArrayList();
    IResource[] selectedResources = getSelectedResources();

    try {
      monitor = Policy.monitorFor(monitor);
      monitor.beginTask(null, selectedResources.length * 100);
      monitor.setTaskName(CVSUIMessages.ReplaceWithAction_calculatingDirtyResources);
      for (int i = 0; i < selectedResources.length; i++) {
        IResource resource = selectedResources[i];
        ICVSResource cvsResource = getCVSResourceFor(resource);
        if (cvsResource.isModified(Policy.subMonitorFor(monitor, 100))) {
          dirtyResources.add(resource);
        }
      }
    } finally {
      monitor.done();
    }

    PromptingDialog dialog =
        new PromptingDialog(
            getShell(),
            selectedResources,
            getPromptCondition(
                (IResource[]) dirtyResources.toArray(new IResource[dirtyResources.size()])),
            CVSUIMessages.ReplaceWithAction_confirmOverwrite);
    return dialog.promptForMultiple();
  }