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/*
* Copyright (C) 2008-2009, Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> 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.transport;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.Constants;
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;
private int type = Constants.OBJ_BAD;
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(AnyObjectId id) {
super(id);
}
/**
* Get offset in pack when object has been already written
*
* @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(long offset) {
this.offset = offset;
}
/**
* Get the 32 bit CRC checksum for the packed data.
*
* @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(int crc) {
this.crc = crc;
}
/**
* Get the object type.
*
* @return the object type. The default type is OBJ_BAD, which is considered
* as unknown or invalid type.
* @since 4.9
*/
public int getType() {
return type;
}
/**
* Record the object type if applicable.
*
* @param type
* the object type.
* @since 4.9
*/
public void setType(int type) {
this.type = type;
}
}
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