1 files changed, 39 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/submit/FastForwardOp.java b/java/com/google/gerrit/server/submit/FastForwardOp.java
new file mode 100644
index 0000000000..08f5abb06d
--- /dev/null
+++ b/java/com/google/gerrit/server/submit/FastForwardOp.java
@@ -0,0 +1,39 @@
+// Copyright (C) 2016 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.submit;
+
+import static com.google.gerrit.server.submit.CommitMergeStatus.EMPTY_COMMIT;
+
+import com.google.gerrit.reviewdb.client.BooleanProjectConfig;
+import com.google.gerrit.server.git.CodeReviewCommit;
+import com.google.gerrit.server.update.RepoContext;
+
+class FastForwardOp extends SubmitStrategyOp {
+  FastForwardOp(SubmitStrategy.Arguments args, CodeReviewCommit toMerge) {
+    super(args, toMerge);
+  }
+
+  @Override
+  protected void updateRepoImpl(RepoContext ctx) throws IntegrationException {
+    if (args.project.is(BooleanProjectConfig.REJECT_EMPTY_COMMIT)
+        && toMerge.getParentCount() > 0
+        && toMerge.getTree().equals(toMerge.getParent(0).getTree())) {
+      toMerge.setStatusCode(EMPTY_COMMIT);
+      return;
+    }
+
+    args.mergeTip.moveTipTo(toMerge, toMerge);
+  }
+}