1 files changed, 121 insertions, 0 deletions
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftree/RefTreeRename.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftree/RefTreeRename.java
new file mode 100644
index 0000000000..5fd7ecdd79
--- /dev/null
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/reftree/RefTreeRename.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2016, Google Inc.
+ * and other copyright owners as documented in the project's IP log.
+ *
+ * This program and the accompanying materials are made available
+ * under the terms of the Eclipse Distribution License v1.0 which
+ * accompanies this distribution, is reproduced below, and is
+ * available at http://www.eclipse.org/org/documents/edl-v10.php
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials provided
+ *   with the distribution.
+ *
+ * - Neither the name of the Eclipse Foundation, Inc. nor the
+ *   names of its contributors may be used to endorse or promote
+ *   products derived from this software without specific prior
+ *   written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.eclipse.jgit.internal.storage.reftree;
+
+import static org.eclipse.jgit.lib.Constants.HEAD;
+import static org.eclipse.jgit.lib.RefUpdate.Result.REJECTED;
+import static org.eclipse.jgit.lib.RefUpdate.Result.RENAMED;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.ObjectIdRef;
+import org.eclipse.jgit.lib.Ref;
+import org.eclipse.jgit.lib.RefRename;
+import org.eclipse.jgit.lib.RefUpdate;
+import org.eclipse.jgit.lib.RefUpdate.Result;
+import org.eclipse.jgit.lib.SymbolicRef;
+import org.eclipse.jgit.revwalk.RevWalk;
+
+/** Single reference rename to {@link RefTreeDatabase}. */
+class RefTreeRename extends RefRename {
+	private final RefTreeDatabase refdb;
+
+	RefTreeRename(RefTreeDatabase refdb, RefUpdate src, RefUpdate dst) {
+		super(src, dst);
+		this.refdb = refdb;
+	}
+
+	@Override
+	protected Result doRename() throws IOException {
+		try (RevWalk rw = new RevWalk(refdb.getRepository())) {
+			RefTreeBatch batch = new RefTreeBatch(refdb);
+			batch.setRefLogIdent(getRefLogIdent());
+			batch.setRefLogMessage(getRefLogMessage(), false);
+			batch.init(rw);
+
+			Ref head = batch.exactRef(rw.getObjectReader(), HEAD);
+			Ref oldRef = batch.exactRef(rw.getObjectReader(), source.getName());
+			if (oldRef == null) {
+				return REJECTED;
+			}
+
+			Ref newRef = asNew(oldRef);
+			List<Command> mv = new ArrayList<>(3);
+			mv.add(new Command(oldRef, null));
+			mv.add(new Command(null, newRef));
+			if (head != null && head.isSymbolic()
+					&& head.getTarget().getName().equals(oldRef.getName())) {
+				mv.add(new Command(
+					head,
+					new SymbolicRef(head.getName(), newRef)));
+			}
+			batch.execute(rw, mv);
+			return RefTreeUpdate.translate(mv.get(1).getResult(), RENAMED);
+		}
+	}
+
+	private Ref asNew(Ref src) {
+		String name = destination.getName();
+		if (src.isSymbolic()) {
+			return new SymbolicRef(name, src.getTarget());
+		}
+
+		ObjectId peeled = src.getPeeledObjectId();
+		if (peeled != null) {
+			return new ObjectIdRef.PeeledTag(
+					src.getStorage(),
+					name,
+					src.getObjectId(),
+					peeled);
+		}
+
+		return new ObjectIdRef.PeeledNonTag(
+				src.getStorage(),
+				name,
+				src.getObjectId());
+	}
+}