| /* |
| * Copyright (C) 2011, 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.dfs; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.jgit.lib.ObjectIdRef; |
| import org.eclipse.jgit.lib.Ref; |
| import org.eclipse.jgit.lib.Ref.Storage; |
| import org.eclipse.jgit.lib.RefUpdate; |
| import org.eclipse.jgit.lib.SymbolicRef; |
| import org.eclipse.jgit.revwalk.RevObject; |
| import org.eclipse.jgit.revwalk.RevTag; |
| import org.eclipse.jgit.revwalk.RevWalk; |
| |
| final class DfsRefUpdate extends RefUpdate { |
| private final DfsRefDatabase refdb; |
| |
| private Ref dstRef; |
| |
| private RevWalk rw; |
| |
| DfsRefUpdate(DfsRefDatabase refdb, Ref ref) { |
| super(ref); |
| this.refdb = refdb; |
| } |
| |
| @Override |
| protected DfsRefDatabase getRefDatabase() { |
| return refdb; |
| } |
| |
| @Override |
| protected DfsRepository getRepository() { |
| return refdb.getRepository(); |
| } |
| |
| @Override |
| protected boolean tryLock(boolean deref) throws IOException { |
| dstRef = getRef(); |
| if (deref) |
| dstRef = dstRef.getLeaf(); |
| |
| if (dstRef.isSymbolic()) |
| setOldObjectId(null); |
| else |
| setOldObjectId(dstRef.getObjectId()); |
| |
| return true; |
| } |
| |
| @Override |
| protected void unlock() { |
| // No state is held while "locked". |
| } |
| |
| @Override |
| public Result update(RevWalk walk) throws IOException { |
| try { |
| rw = walk; |
| return super.update(walk); |
| } finally { |
| rw = null; |
| } |
| } |
| |
| @Override |
| protected Result doUpdate(Result desiredResult) throws IOException { |
| ObjectIdRef newRef; |
| RevObject obj = rw.parseAny(getNewObjectId()); |
| if (obj instanceof RevTag) { |
| newRef = new ObjectIdRef.PeeledTag( |
| Storage.PACKED, |
| dstRef.getName(), |
| getNewObjectId(), |
| rw.peel(obj).copy()); |
| } else { |
| newRef = new ObjectIdRef.PeeledNonTag( |
| Storage.PACKED, |
| dstRef.getName(), |
| getNewObjectId()); |
| } |
| |
| if (getRefDatabase().compareAndPut(dstRef, newRef)) { |
| getRefDatabase().stored(newRef); |
| return desiredResult; |
| } |
| return Result.LOCK_FAILURE; |
| } |
| |
| @Override |
| protected Result doDelete(Result desiredResult) throws IOException { |
| if (getRefDatabase().compareAndRemove(dstRef)) { |
| getRefDatabase().removed(dstRef.getName()); |
| return desiredResult; |
| } |
| return Result.LOCK_FAILURE; |
| } |
| |
| @Override |
| protected Result doLink(String target) throws IOException { |
| final SymbolicRef newRef = new SymbolicRef( |
| dstRef.getName(), |
| new ObjectIdRef.Unpeeled( |
| Storage.NEW, |
| target, |
| null)); |
| if (getRefDatabase().compareAndPut(dstRef, newRef)) { |
| getRefDatabase().stored(newRef); |
| if (dstRef.getStorage() == Ref.Storage.NEW) |
| return Result.NEW; |
| return Result.FORCED; |
| } |
| return Result.LOCK_FAILURE; |
| } |
| } |