1 files changed, 39 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/notedb/NoteDbRewriter.java b/java/com/google/gerrit/server/notedb/NoteDbRewriter.java
new file mode 100644
index 0000000000..3c7b0a31fa
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+++ b/java/com/google/gerrit/server/notedb/NoteDbRewriter.java
@@ -0,0 +1,39 @@
+// 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.notedb;
+
+import com.google.gwtorm.server.OrmException;
+import java.io.IOException;
+import org.eclipse.jgit.errors.ConfigInvalidException;
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.ObjectInserter;
+import org.eclipse.jgit.revwalk.RevWalk;
+
+public interface NoteDbRewriter {
+
+  /** Gets the name of the target ref which will be rewritten. */
+  String getRefName();
+
+  /**
+   * Rewrites the commit history.
+   *
+   * @param revWalk a {@code RevWalk} instance.
+   * @param inserter a {@code ObjectInserter} instance.
+   * @param currTip the {@code ObjectId} of the ref's tip commit.
+   * @return the {@code ObjectId} of the ref's new tip commit.
+   */
+  ObjectId rewriteCommitHistory(RevWalk revWalk, ObjectInserter inserter, ObjectId currTip)
+      throws IOException, ConfigInvalidException, OrmException;
+}