| /* |
| * 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 org.eclipse.jgit.lib.RefDatabase; |
| |
| /** |
| * Magic reference name logic for RefTrees. |
| */ |
| public class RefTreeNames { |
| /** |
| * Suffix used on a {@link RefTreeDatabase#getTxnNamespace()} for user data. |
| * <p> |
| * A {@link RefTreeDatabase}'s namespace may include a subspace (e.g. |
| * {@code "refs/txn/stage/"}) containing commit objects from the usual user |
| * portion of the repository (e.g. {@code "refs/heads/"}). These should be |
| * packed by the garbage collector alongside other user content rather than |
| * with the RefTree. |
| */ |
| private static final String STAGE = "stage/"; //$NON-NLS-1$ |
| |
| /** |
| * Determine if the reference is likely to be a RefTree. |
| * |
| * @param refdb |
| * database instance. |
| * @param ref |
| * reference name. |
| * @return {@code true} if the reference is a RefTree. |
| */ |
| public static boolean isRefTree(RefDatabase refdb, String ref) { |
| if (refdb instanceof RefTreeDatabase) { |
| RefTreeDatabase b = (RefTreeDatabase) refdb; |
| if (ref.equals(b.getTxnCommitted())) { |
| return true; |
| } |
| |
| String namespace = b.getTxnNamespace(); |
| if (namespace != null |
| && ref.startsWith(namespace) |
| && !ref.startsWith(namespace + STAGE)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private RefTreeNames() { |
| } |
| } |