| /* |
| * Copyright (C) 2016, Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| 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() { |
| } |
| } |