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/*
* Copyright (C) 2024, GerritForge 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.midx;
import java.util.Set;
import org.eclipse.jgit.lib.AbbreviatedObjectId;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.ObjectId;
/**
* An index over multiple packs
*/
public interface MultiPackIndex {
/**
* Obtain the array of packfiles in the MultiPackIndex.
* <p>
* The pack ids correspond to positions in this list.
*
* @return array of packnames refered in this multipak index
*/
String[] getPackNames();
/**
* Does this index contains the object
*
* @param oid
* object id
* @return true of the index knows this the object
*/
boolean hasObject(AnyObjectId oid);
/**
* Obtain the location of the object.
* <p>
* The returned object can be reused by the implementations. Callers
* must create a #copy() if they want to keep a reference.
*
* @param objectId
* objectId to read.
* @return mutable instance with the location or null if not found.
*/
PackOffset find(AnyObjectId objectId);
/**
* Find objects matching the prefix abbreviation.
*
* @param matches
* set to add any located ObjectIds to. This is an output
* parameter.
* @param id
* prefix to search for.
* @param matchLimit
* maximum number of results to return. At most this many
* ObjectIds should be added to matches before returning.
*/
void resolve(Set<ObjectId> matches, AbbreviatedObjectId id, int matchLimit);
/**
* Memory size of this multipack index
*
* @return size of this multipack index in memory, in bytes
*/
long getMemorySize();
/**
* (packId, offset) coordinates of an object
*/
class PackOffset {
int packId;
long offset;
protected PackOffset setValues(int packId, long offset) {
this.packId = packId;
this.offset = offset;
return this;
}
public int getPackId() {
return packId;
}
public long getOffset() {
return offset;
}
public PackOffset copy() {
PackOffset copy = new PackOffset();
return copy.setValues(this.packId, this.offset);
}
}
}
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