private void rollbackChanged()

in src/com/intellij/vssSupport/Checkin/VssRollbackEnvironment.java [162:235]
44 lines of code
9 McCabe index (conditional complexity)

  private void rollbackChanged( List<Change> changes, HashSet<FilePath> processedFiles, List<VcsException> errors, @NotNull final RollbackProgressListener listener)
  {
    ArrayList<String> rollbacked = new ArrayList<>();
    for( Change change : changes )
    {
      if( !VcsUtil.isChangeForNew( change ) &&
          !VcsUtil.isChangeForDeleted( change ) &&
          !VcsUtil.isChangeForFolder( change ) )
      {
        FilePath filePath = change.getAfterRevision().getFile();
        String path = filePath.getPath();
        listener.accept(change);

        if( VcsUtil.isRenameChange( change ) )
        {
          //  Track two different cases:
          //  - we delete the file which is already in the repository.
          //    Here we need to "Get" the latest version of the original
          //    file from the repository, make "UndoCheckout" for it (since
          //    it was obviously checked out for a rename change), and
          //    delete the new file.
          //  - we delete the renamed file which is new and does not exist
          //    in the repository. We need to ignore the error message from
          //    the SourceSafe ("file not existing") and just delete the
          //    new file.

          List<VcsException> localErrs = new ArrayList<>();
          final FilePath oldFile = change.getBeforeRevision().getFile();

          boolean fileAbsent = host.getLatestVersion( oldFile.getPath(), false, localErrs );
          if( fileAbsent )
            errors.addAll( localErrs );
          else
          {
            //-----------------------------------------------------------------
            //  1. add marker telling that we do not want to track this file's
            //     deletion event.
            //     NB: VirtualFile for this file can be null if e.g. this renamed
            //         file occured within renamed folder. Folders are rollbacked
            //         first, so there could be no placeholder for the old file
            //         location.
            //  2. WAIT for this file. Without this we aint be able to issue
            //     "Undo CheckOut" command since it work only on VirtualFiles.
            // ToDO: refactor UndoCheckout so that it does not require VirtualFiles.
            //-----------------------------------------------------------------
            LocalFileSystem.getInstance().refreshAndFindFileByPath(oldFile.getPath());

            VirtualFile vfile = filePath.getVirtualFile();
            if( vfile != null )
              vfile.putUserData( RENAME_ROLLBACK, true );

            rollbacked.add( oldFile.getPath() );
          }

          host.renamedFiles.remove( path );
          FileUtil.delete( new File( path ) );
        }
        else
        {
          path = discoverOldName( path ); 
          //  Collect all files to be uncheckouted into one set so that
          //  if dialog popups we could say "Yes to all"
          rollbacked.add( path );
        }
        processedFiles.add( filePath );
      }
    }

    if( rollbacked.size() > 0 )
    {
      String[] files = ArrayUtil.toStringArray(rollbacked);
      host.rollbackChanges( files, errors );
    }
  }