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// Copyright (C) 2020 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.gerrit.server.patch.filediff;

import com.google.auto.value.AutoValue;
import java.util.Optional;

/**
 * An entity containing the four git diffs for a {@link FileDiffCacheKey}:
 *
 * 
 *   The old vs. new commit
 *   
The old commit vs. the old parent
 *   
The new commit vs. the new parent
 *   
The old parent vs. the new parent
 * 
 */
@AutoValue
abstract class AllFileGitDiffs {
  abstract AugmentedFileDiffCacheKey augmentedKey();

  abstract GitDiffEntity mainDiff();

  abstract Optional oldVsParentDiff();

  abstract Optional newVsParentDiff();

  abstract Optional parentVsParentDiff();

  static AllFileGitDiffs.Builder builder() {
    return new AutoValue_AllFileGitDiffs.Builder();
  }

  @AutoValue.Builder
  public abstract static class Builder {

    public abstract Builder augmentedKey(AugmentedFileDiffCacheKey value);

    public abstract Builder mainDiff(GitDiffEntity value);

    public abstract Builder oldVsParentDiff(Optional value);

    public abstract Builder newVsParentDiff(Optional value);

    public abstract Builder parentVsParentDiff(Optional value);

    public abstract AllFileGitDiffs build();
  }
}