com.google.gerrit.server.patch.DiffMappings Maven / Gradle / Ivy
// 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;
import static com.google.common.collect.ImmutableSet.toImmutableSet;
import static java.util.stream.Collectors.toList;
import com.google.common.collect.ImmutableSet;
import com.google.gerrit.entities.Patch;
import com.google.gerrit.server.patch.GitPositionTransformer.FileMapping;
import com.google.gerrit.server.patch.GitPositionTransformer.Mapping;
import com.google.gerrit.server.patch.GitPositionTransformer.Range;
import com.google.gerrit.server.patch.GitPositionTransformer.RangeMapping;
import com.google.gerrit.server.patch.filediff.Edit;
import com.google.gerrit.server.patch.filediff.FileEdits;
import java.util.List;
/** Mappings derived from diffs. */
public class DiffMappings {
private DiffMappings() {}
public static Mapping toMapping(PatchListEntry patchListEntry) {
FileMapping fileMapping = toFileMapping(patchListEntry);
ImmutableSet rangeMappings = toRangeMappings(patchListEntry);
return Mapping.create(fileMapping, rangeMappings);
}
public static Mapping toMapping(FileEdits fileEdits) {
FileMapping fileMapping = FileMapping.forFile(fileEdits.oldPath(), fileEdits.newPath());
ImmutableSet rangeMappings = toRangeMappings(fileEdits.edits());
return Mapping.create(fileMapping, rangeMappings);
}
private static FileMapping toFileMapping(PatchListEntry ple) {
return toFileMapping(ple.getChangeType(), ple.getOldName(), ple.getNewName());
}
private static FileMapping toFileMapping(
Patch.ChangeType changeType, String oldName, String newName) {
switch (changeType) {
case ADDED:
return FileMapping.forAddedFile(newName);
case MODIFIED:
case REWRITE:
return FileMapping.forModifiedFile(newName);
case DELETED:
// Name of deleted file is mentioned as newName.
return FileMapping.forDeletedFile(newName);
case RENAMED:
case COPIED:
return FileMapping.forRenamedFile(oldName, newName);
default:
throw new IllegalStateException("Unmapped diff type: " + changeType);
}
}
private static ImmutableSet toRangeMappings(PatchListEntry patchListEntry) {
return toRangeMappings(
patchListEntry.getEdits().stream().map(Edit::fromJGitEdit).collect(toList()));
}
private static ImmutableSet toRangeMappings(List edits) {
return edits.stream()
.map(
edit ->
RangeMapping.create(
Range.create(edit.beginA(), edit.endA()),
Range.create(edit.beginB(), edit.endB())))
.collect(toImmutableSet());
}
}