// Copyright (C) 2017 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.edit.tree;
import com.google.common.annotations.VisibleForTesting;
import java.io.IOException;
import java.util.List;
import org.eclipse.jgit.dircache.DirCacheEditor;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
/** A specific modification of a Git tree. */
public interface TreeModification {
/**
* Returns a list of {@code PathEdit}s which are necessary in order to achieve the desired
* modification of the Git tree. The order of the {@code PathEdit}s can be crucial and hence
* shouldn't be changed.
*
* @param repository the affected Git repository
* @param baseCommit the commit to whose tree this modification is applied
* @return an ordered list of necessary {@code PathEdit}s
* @throws IOException if problems arise when accessing the repository
*/
List<DirCacheEditor.PathEdit> getPathEdits(Repository repository, RevCommit baseCommit)
throws IOException;
/**
* Indicates a file path which is affected by this {@code TreeModification}. If the modification
* refers to several file paths (e.g. renaming a file), returning either of them is appropriate as
* long as the returned value is deterministic.
*
* @return an affected file path
*/
@VisibleForTesting
String getFilePath();
}