| /* |
| * Copyright (C) 2008-2009, Robin Rosenberg <robin.rosenberg@dewire.com> |
| * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> |
| * 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.transport; |
| |
| import org.eclipse.jgit.lib.AnyObjectId; |
| import org.eclipse.jgit.lib.ObjectIdOwnerMap; |
| |
| /** |
| * Description of an object stored in a pack file, including offset. |
| * <p> |
| * When objects are stored in packs Git needs the ObjectId and the offset |
| * (starting position of the object data) to perform random-access reads of |
| * objects from the pack. This extension of ObjectId includes the offset. |
| */ |
| public class PackedObjectInfo extends ObjectIdOwnerMap.Entry { |
| private long offset; |
| |
| private int crc; |
| |
| PackedObjectInfo(final long headerOffset, final int packedCRC, |
| final AnyObjectId id) { |
| super(id); |
| offset = headerOffset; |
| crc = packedCRC; |
| } |
| |
| /** |
| * Create a new structure to remember information about an object. |
| * |
| * @param id |
| * the identity of the object the new instance tracks. |
| */ |
| public PackedObjectInfo(final AnyObjectId id) { |
| super(id); |
| } |
| |
| /** |
| * @return offset in pack when object has been already written, or 0 if it |
| * has not been written yet |
| */ |
| public long getOffset() { |
| return offset; |
| } |
| |
| /** |
| * Set the offset in pack when object has been written to. |
| * |
| * @param offset |
| * offset where written object starts |
| */ |
| public void setOffset(final long offset) { |
| this.offset = offset; |
| } |
| |
| /** |
| * @return the 32 bit CRC checksum for the packed data. |
| */ |
| public int getCRC() { |
| return crc; |
| } |
| |
| /** |
| * Record the 32 bit CRC checksum for the packed data. |
| * |
| * @param crc |
| * checksum of all packed data (including object type code, |
| * inflated length and delta base reference) as computed by |
| * {@link java.util.zip.CRC32}. |
| */ |
| public void setCRC(final int crc) { |
| this.crc = crc; |
| } |
| } |