| /* |
| * Copyright (C) 2008-2009, Google Inc. |
| * Copyright (C) 2009, Robin Rosenberg <robin.rosenberg@dewire.com> 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.merge; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.jgit.lib.Config; |
| import org.eclipse.jgit.lib.ObjectId; |
| import org.eclipse.jgit.lib.ObjectInserter; |
| import org.eclipse.jgit.lib.Repository; |
| |
| /** |
| * Trivial merge strategy to make the resulting tree exactly match an input. |
| * <p> |
| * This strategy can be used to cauterize an entire side branch of history, by |
| * setting the output tree to one of the inputs, and ignoring any of the paths |
| * of the other inputs. |
| */ |
| public class StrategyOneSided extends MergeStrategy { |
| private final String strategyName; |
| |
| private final int treeIndex; |
| |
| /** |
| * Create a new merge strategy to select a specific input tree. |
| * |
| * @param name |
| * name of this strategy. |
| * @param index |
| * the position of the input tree to accept as the result. |
| */ |
| protected StrategyOneSided(String name, int index) { |
| strategyName = name; |
| treeIndex = index; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public String getName() { |
| return strategyName; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public Merger newMerger(Repository db) { |
| return new OneSide(db, treeIndex); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public Merger newMerger(Repository db, boolean inCore) { |
| return new OneSide(db, treeIndex); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public Merger newMerger(ObjectInserter inserter, Config config) { |
| return new OneSide(inserter, treeIndex); |
| } |
| |
| static class OneSide extends Merger { |
| private final int treeIndex; |
| |
| protected OneSide(Repository local, int index) { |
| super(local); |
| treeIndex = index; |
| } |
| |
| protected OneSide(ObjectInserter inserter, int index) { |
| super(inserter); |
| treeIndex = index; |
| } |
| |
| @Override |
| protected boolean mergeImpl() throws IOException { |
| return treeIndex < sourceTrees.length; |
| } |
| |
| @Override |
| public ObjectId getResultTreeId() { |
| return sourceTrees[treeIndex]; |
| } |
| |
| @Override |
| public ObjectId getBaseCommitId() { |
| return null; |
| } |
| } |
| } |