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/*
* Copyright (C) 2023, Tencent.
*
* 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.revwalk;
import java.io.IOException;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.internal.storage.commitgraph.ChangedPathFilter;
import org.eclipse.jgit.internal.storage.commitgraph.CommitGraph;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
/**
* RevCommit parsed from
* {@link org.eclipse.jgit.internal.storage.commitgraph.CommitGraph}.
*
* @since 6.5
*/
class RevCommitCG extends RevCommit {
private final int graphPosition;
private int generation = Constants.COMMIT_GENERATION_UNKNOWN;
/**
* Create a new commit reference.
*
* @param id
* object name for the commit.
* @param graphPosition
* the position in the commit-graph of the object.
*/
protected RevCommitCG(AnyObjectId id, int graphPosition) {
super(id);
this.graphPosition = graphPosition;
}
@Override
void parseCanonical(RevWalk walk, byte[] raw) throws IOException {
if (walk.isRetainBody()) {
buffer = raw;
}
parseInGraph(walk);
}
@Override
void parseHeaders(RevWalk walk) throws MissingObjectException,
IncorrectObjectTypeException, IOException {
if (walk.isRetainBody()) {
super.parseBody(walk); // This parses header and body
return;
}
parseInGraph(walk);
}
private void parseInGraph(RevWalk walk) throws IOException {
CommitGraph graph = walk.commitGraph();
CommitGraph.CommitData data = graph.getCommitData(graphPosition);
if (data == null) {
// RevCommitCG was created because we got its graphPosition from
// commit-graph. If now the commit-graph doesn't know about it,
// something went wrong.
throw new IllegalStateException();
}
if (!walk.shallowCommitsInitialized) {
walk.initializeShallowCommits(this);
}
this.tree = walk.lookupTree(data.getTree());
this.commitTime = (int) data.getCommitTime();
this.generation = data.getGeneration();
if (getParents() == null) {
int[] pGraphList = data.getParents();
if (pGraphList.length == 0) {
this.parents = RevCommit.NO_PARENTS;
} else {
RevCommit[] pList = new RevCommit[pGraphList.length];
for (int i = 0; i < pList.length; i++) {
int graphPos = pGraphList[i];
ObjectId objId = graph.getObjectId(graphPos);
pList[i] = walk.lookupCommit(objId, graphPos);
}
this.parents = pList;
}
}
flags |= PARSED;
}
@Override
int getGeneration() {
return generation;
}
/** {@inheritDoc} */
@Override
public ChangedPathFilter getChangedPathFilter(RevWalk rw) {
return rw.commitGraph().getChangedPathFilter(graphPosition);
}
}
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