Line data    Source code

       1             : // Copyright (C) 2021 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.server.change;
      16             : 
      17             : import static java.util.Comparator.comparing;
      18             : import static java.util.stream.Collectors.toList;
      19             : 
      20             : import java.io.IOException;
      21             : import java.util.Collection;
      22             : import java.util.List;
      23             : import org.eclipse.jgit.lib.Ref;
      24             : import org.eclipse.jgit.revwalk.RevWalk;
      25             : 
      26           0 : public class IncludedInUtil {
      27             : 
      28             :   /**
      29             :    * Sorts the collection of {@code Ref} instances by its tip commit time.
      30             :    *
      31             :    * @param refs collection to be sorted
      32             :    * @param revWalk {@code RevWalk} instance for parsing ref's tip commit
      33             :    * @return sorted list of refs
      34             :    */
      35             :   public static List<Ref> getSortedRefs(Collection<Ref> refs, RevWalk revWalk) {
      36           3 :     return refs.stream()
      37           3 :         .sorted(
      38           3 :             comparing(
      39             :                 ref -> {
      40             :                   try {
      41           2 :                     return revWalk.parseCommit(ref.getObjectId()).getCommitTime();
      42           0 :                   } catch (IOException e) {
      43             :                     // Ignore and continue to sort
      44             :                   }
      45           0 :                   return 0;
      46             :                 }))
      47           3 :         .collect(toList());
      48             :   }
      49             : }