com.google.gerrit.server.git.ReviewNoteMerger Maven / Gradle / Ivy
/*
* Copyright (C) 2010, Sasa Zivkov 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
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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package com.google.gerrit.server.git;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.lib.ObjectLoader;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.ObjectStream;
import org.eclipse.jgit.notes.Note;
import org.eclipse.jgit.notes.NoteMerger;
import org.eclipse.jgit.util.io.UnionInputStream;
class ReviewNoteMerger implements NoteMerger {
@Override
public Note merge(Note base, Note ours, Note theirs, ObjectReader reader, ObjectInserter inserter)
throws IOException {
if (ours == null) {
return theirs;
}
if (theirs == null) {
return ours;
}
if (ours.getData().equals(theirs.getData())) {
return ours;
}
ObjectLoader lo = reader.open(ours.getData());
byte[] sep = new byte[] {'\n'};
ObjectLoader lt = reader.open(theirs.getData());
try (ObjectStream os = lo.openStream();
ByteArrayInputStream b = new ByteArrayInputStream(sep);
ObjectStream ts = lt.openStream();
UnionInputStream union = new UnionInputStream(os, b, ts)) {
ObjectId noteData =
inserter.insert(Constants.OBJ_BLOB, lo.getSize() + sep.length + lt.getSize(), union);
return new Note(ours, noteData);
}
}
}