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.patch;
      16             : 
      17             : import com.google.gerrit.common.Nullable;
      18             : import com.google.gerrit.entities.Patch.ChangeType;
      19             : import java.util.Optional;
      20             : 
      21             : /**
      22             :  * Adapter for old/new paths of the new diff cache to the old diff cache representation. This is
      23             :  * needed for backward compatibility with all old diff cache callers.
      24             :  *
      25             :  * <p>TODO(ghareeb): It's better to revisit this logic and update all diff cache callers to use the
      26             :  * new diff cache output directly.
      27             :  */
      28             : public class FilePathAdapter {
      29             :   private FilePathAdapter() {}
      30             : 
      31             :   /**
      32             :    * Converts the old file path of the new diff cache output to the old diff cache representation.
      33             :    */
      34             :   @Nullable
      35             :   public static String getOldPath(Optional<String> oldName, ChangeType changeType) {
      36         103 :     switch (changeType) {
      37             :       case DELETED:
      38             :       case ADDED:
      39             :       case MODIFIED:
      40         103 :         return null;
      41             :       case COPIED:
      42             :       case RENAMED:
      43          11 :         return oldName.get();
      44             :       case REWRITE:
      45           2 :         return oldName.isPresent() ? oldName.get() : null;
      46             :       default:
      47           0 :         throw new IllegalArgumentException("Unsupported type " + changeType);
      48             :     }
      49             :   }
      50             : 
      51             :   /**
      52             :    * Converts the new file path of the new diff cache output to the old diff cache representation.
      53             :    */
      54             :   public static String getNewPath(
      55             :       Optional<String> oldName, Optional<String> newName, ChangeType changeType) {
      56          90 :     switch (changeType) {
      57             :       case DELETED:
      58          22 :         return oldName.get();
      59             :       case ADDED:
      60             :       case MODIFIED:
      61             :       case REWRITE:
      62             :       case COPIED:
      63             :       case RENAMED:
      64          90 :         return newName.get();
      65             :       default:
      66           0 :         throw new IllegalArgumentException("Unsupported type " + changeType);
      67             :     }
      68             :   }
      69             : }