| // Copyright (C) 2016 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.server.patch; |
| |
| import static com.google.gerrit.server.ioutil.BasicSerialization.readVarInt32; |
| import static com.google.gerrit.server.ioutil.BasicSerialization.writeVarInt32; |
| |
| import com.google.auto.value.AutoValue; |
| import com.google.gerrit.server.cache.proto.Cache.FileDiffOutputProto; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.Optional; |
| |
| /** Relation between the old and new commits used in the diff. */ |
| @AutoValue |
| public abstract class ComparisonType { |
| |
| /** |
| * 1-based parent. Available if the old commit is the parent of the new commit and old commit is |
| * not the auto-merge. If set to 0, then comparison is for a root commit. |
| */ |
| abstract Optional<Integer> parentNum(); |
| |
| abstract boolean autoMerge(); |
| |
| public static ComparisonType againstOtherPatchSet() { |
| return new AutoValue_ComparisonType(Optional.empty(), false); |
| } |
| |
| public static ComparisonType againstParent(int parentNum) { |
| return new AutoValue_ComparisonType(Optional.of(parentNum), false); |
| } |
| |
| public static ComparisonType againstAutoMerge() { |
| return new AutoValue_ComparisonType(Optional.empty(), true); |
| } |
| |
| public static ComparisonType againstRoot() { |
| return new AutoValue_ComparisonType(Optional.of(0), false); |
| } |
| |
| private static ComparisonType create(Optional<Integer> parent, boolean automerge) { |
| return new AutoValue_ComparisonType(parent, automerge); |
| } |
| |
| public boolean isAgainstParentOrAutoMerge() { |
| return isAgainstParent() || isAgainstAutoMerge(); |
| } |
| |
| public boolean isAgainstParent() { |
| return parentNum().isPresent(); |
| } |
| |
| public boolean isAgainstAutoMerge() { |
| return autoMerge(); |
| } |
| |
| public Optional<Integer> getParentNum() { |
| return parentNum(); |
| } |
| |
| void writeTo(OutputStream out) throws IOException { |
| writeVarInt32(out, isAgainstParent() ? parentNum().get() : 0); |
| writeVarInt32(out, autoMerge() ? 1 : 0); |
| } |
| |
| static ComparisonType readFrom(InputStream in) throws IOException { |
| int p = readVarInt32(in); |
| Optional<Integer> parentNum = p > 0 ? Optional.of(p) : Optional.empty(); |
| boolean autoMerge = readVarInt32(in) != 0; |
| return create(parentNum, autoMerge); |
| } |
| |
| public FileDiffOutputProto.ComparisonType toProto() { |
| FileDiffOutputProto.ComparisonType.Builder builder = |
| FileDiffOutputProto.ComparisonType.newBuilder().setAutoMerge(autoMerge()); |
| if (parentNum().isPresent()) { |
| builder.setParentNum(parentNum().get()); |
| } |
| return builder.build(); |
| } |
| |
| public static ComparisonType fromProto(FileDiffOutputProto.ComparisonType proto) { |
| Optional<Integer> parentNum = Optional.empty(); |
| if (proto.hasField(FileDiffOutputProto.ComparisonType.getDescriptor().findFieldByNumber(1))) { |
| parentNum = Optional.of(proto.getParentNum()); |
| } |
| return create(parentNum, proto.getAutoMerge()); |
| } |
| } |