| /* |
| * Copyright (C) 2010, 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.file; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.jgit.internal.storage.pack.StoredObjectRepresentation; |
| import org.eclipse.jgit.lib.ObjectId; |
| |
| class LocalObjectRepresentation extends StoredObjectRepresentation { |
| static LocalObjectRepresentation newWhole(Pack pack, long offset, long length) { |
| LocalObjectRepresentation r = new LocalObjectRepresentation() { |
| @Override |
| public int getFormat() { |
| return PACK_WHOLE; |
| } |
| }; |
| r.pack = pack; |
| r.offset = offset; |
| r.length = length; |
| return r; |
| } |
| |
| static LocalObjectRepresentation newDelta(Pack pack, long offset, long length, |
| ObjectId base) { |
| LocalObjectRepresentation r = new Delta(); |
| r.pack = pack; |
| r.offset = offset; |
| r.length = length; |
| r.baseId = base; |
| return r; |
| } |
| |
| static LocalObjectRepresentation newDelta(Pack pack, long offset, long length, |
| long base) { |
| LocalObjectRepresentation r = new Delta(); |
| r.pack = pack; |
| r.offset = offset; |
| r.length = length; |
| r.baseOffset = base; |
| return r; |
| } |
| |
| Pack pack; |
| |
| long offset; |
| |
| long length; |
| |
| private long baseOffset; |
| |
| private ObjectId baseId; |
| |
| @Override |
| public int getWeight() { |
| return (int) Math.min(length, Integer.MAX_VALUE); |
| } |
| |
| @Override |
| public ObjectId getDeltaBase() { |
| if (baseId == null && getFormat() == PACK_DELTA) { |
| try { |
| baseId = pack.findObjectForOffset(baseOffset); |
| } catch (IOException error) { |
| return null; |
| } |
| } |
| return baseId; |
| } |
| |
| private static final class Delta extends LocalObjectRepresentation { |
| @Override |
| public int getFormat() { |
| return PACK_DELTA; |
| } |
| } |
| } |