Line data    Source code

       1             : // Copyright (C) 2017 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 com.google.gerrit.entities.PatchSet;
      18             : import com.google.gerrit.extensions.restapi.BadRequestException;
      19             : import com.google.gerrit.extensions.restapi.ResourceConflictException;
      20             : import com.google.gerrit.server.git.PureRevertCache;
      21             : import com.google.gerrit.server.notedb.ChangeNotes;
      22             : import com.google.inject.Inject;
      23             : import com.google.inject.Singleton;
      24             : import java.io.IOException;
      25             : import java.util.Optional;
      26             : import org.eclipse.jgit.errors.InvalidObjectIdException;
      27             : import org.eclipse.jgit.lib.ObjectId;
      28             : 
      29             : /** Can check if a change is a pure revert (= a revert with no further modifications). */
      30             : @Singleton
      31             : public class PureRevert {
      32             :   private final PureRevertCache pureRevertCache;
      33             : 
      34             :   @Inject
      35         146 :   PureRevert(PureRevertCache pureRevertCache) {
      36         146 :     this.pureRevertCache = pureRevertCache;
      37         146 :   }
      38             : 
      39             :   public boolean get(ChangeNotes notes, Optional<String> claimedOriginal)
      40             :       throws IOException, BadRequestException, ResourceConflictException {
      41          15 :     PatchSet currentPatchSet = notes.getCurrentPatchSet();
      42          15 :     if (currentPatchSet == null) {
      43           0 :       throw new ResourceConflictException("current revision is missing");
      44             :     }
      45          15 :     if (!claimedOriginal.isPresent()) {
      46          14 :       return pureRevertCache.isPureRevert(notes);
      47             :     }
      48             : 
      49             :     ObjectId claimedOriginalObjectId;
      50             :     try {
      51           1 :       claimedOriginalObjectId = ObjectId.fromString(claimedOriginal.get());
      52           1 :     } catch (InvalidObjectIdException e) {
      53           1 :       throw new BadRequestException("invalid object ID", e);
      54           1 :     }
      55             : 
      56           1 :     return pureRevertCache.isPureRevert(
      57           1 :         notes.getProjectName(), notes.getCurrentPatchSet().commitId(), claimedOriginalObjectId);
      58             :   }
      59             : }