| // Copyright (C) 2020 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.gitdiff; |
| |
| import com.google.auto.value.AutoValue; |
| import com.google.gerrit.entities.Patch.ChangeType; |
| import com.google.gerrit.proto.Protos; |
| import com.google.gerrit.server.cache.proto.Cache.ModifiedFileProto; |
| import com.google.gerrit.server.cache.serialize.CacheSerializer; |
| import com.google.protobuf.Descriptors.FieldDescriptor; |
| import java.util.Optional; |
| |
| /** |
| * An entity representing a Modified file due to a diff between 2 git trees. This entity contains |
| * the change type and the old & new paths, but does not include any actual content diff of the |
| * file. |
| */ |
| @AutoValue |
| public abstract class ModifiedFile { |
| /** |
| * Returns the change type (i.e. add, delete, modify, rename, etc...) associated with this |
| * modified file. |
| */ |
| public abstract ChangeType changeType(); |
| |
| /** |
| * Returns the old name associated with this file. An empty optional is returned if {@link |
| * #changeType()} is equal to {@link ChangeType#ADDED}. |
| */ |
| public abstract Optional<String> oldPath(); |
| |
| /** |
| * Returns the new name associated with this file. An empty optional is returned if {@link |
| * #changeType()} is equal to {@link ChangeType#DELETED} |
| */ |
| public abstract Optional<String> newPath(); |
| |
| public static Builder builder() { |
| return new AutoValue_ModifiedFile.Builder(); |
| } |
| |
| public abstract Builder toBuilder(); |
| |
| /** Computes this object's weight, which is its size in bytes. */ |
| public int weight() { |
| int weight = 1; // the changeType field |
| if (oldPath().isPresent()) { |
| weight += oldPath().get().length(); |
| } |
| if (newPath().isPresent()) { |
| weight += newPath().get().length(); |
| } |
| return weight; |
| } |
| |
| @AutoValue.Builder |
| public abstract static class Builder { |
| |
| public abstract Builder changeType(ChangeType value); |
| |
| public abstract Builder oldPath(Optional<String> value); |
| |
| public abstract Builder newPath(Optional<String> value); |
| |
| public abstract ModifiedFile build(); |
| } |
| |
| enum Serializer implements CacheSerializer<ModifiedFile> { |
| INSTANCE; |
| |
| private static final FieldDescriptor oldPathDescriptor = |
| ModifiedFileProto.getDescriptor().findFieldByNumber(2); |
| |
| private static final FieldDescriptor newPathDescriptor = |
| ModifiedFileProto.getDescriptor().findFieldByNumber(3); |
| |
| @Override |
| public byte[] serialize(ModifiedFile modifiedFile) { |
| return Protos.toByteArray(toProto(modifiedFile)); |
| } |
| |
| public ModifiedFileProto toProto(ModifiedFile modifiedFile) { |
| ModifiedFileProto.Builder builder = ModifiedFileProto.newBuilder(); |
| builder.setChangeType(modifiedFile.changeType().toString()); |
| if (modifiedFile.oldPath().isPresent()) { |
| builder.setOldPath(modifiedFile.oldPath().get()); |
| } |
| if (modifiedFile.newPath().isPresent()) { |
| builder.setNewPath(modifiedFile.newPath().get()); |
| } |
| return builder.build(); |
| } |
| |
| @Override |
| public ModifiedFile deserialize(byte[] in) { |
| ModifiedFileProto modifiedFileProto = Protos.parseUnchecked(ModifiedFileProto.parser(), in); |
| return fromProto(modifiedFileProto); |
| } |
| |
| public ModifiedFile fromProto(ModifiedFileProto modifiedFileProto) { |
| ModifiedFile.Builder builder = ModifiedFile.builder(); |
| builder.changeType(ChangeType.valueOf(modifiedFileProto.getChangeType())); |
| |
| if (modifiedFileProto.hasField(oldPathDescriptor)) { |
| builder.oldPath(Optional.of(modifiedFileProto.getOldPath())); |
| } |
| if (modifiedFileProto.hasField(newPathDescriptor)) { |
| builder.newPath(Optional.of(modifiedFileProto.getNewPath())); |
| } |
| return builder.build(); |
| } |
| } |
| } |