com.google.gerrit.entities.Patch Maven / Gradle / Ivy
// Copyright (C) 2008 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.entities;
import static com.google.common.base.Preconditions.checkArgument;
import com.google.auto.value.AutoValue;
import com.google.common.base.Splitter;
import com.google.common.primitives.Ints;
import com.google.gerrit.common.UsedAt;
import java.util.List;
/**
* Wrapper class for patch related aspects. Originally, this class represented a single modified
* file in a {@link PatchSet}. It's only kept in its current form as {@link ChangeType} and {@link
* PatchType} are used in diff cache entries for which we would break the serialization if we moved
* the enums somewhere else.
*/
public final class Patch {
/** Magical file name which represents the commit message. */
public static final String COMMIT_MSG = "/COMMIT_MSG";
/** Magical file name which represents the merge list of a merge commit. */
public static final String MERGE_LIST = "/MERGE_LIST";
/**
* Magical file name which doesn't represent a file. Used specifically for patchset-level
* comments.
*/
public static final String PATCHSET_LEVEL = "/PATCHSET_LEVEL";
/**
* Checks if the given path represents a magic file. A magic file is a generated file that is
* automatically included into changes. It does not exist in the commit of the patch set.
*
* @param path the file path
* @return {@code true} if the path represents a magic file, otherwise {@code false}.
*/
public static boolean isMagic(String path) {
return COMMIT_MSG.equals(path) || MERGE_LIST.equals(path) || PATCHSET_LEVEL.equals(path);
}
public static Key key(PatchSet.Id patchSetId, String fileName) {
return new AutoValue_Patch_Key(patchSetId, fileName);
}
@AutoValue
public abstract static class Key {
/** Parse a Patch.Key out of a string representation. */
public static Key parse(String str) {
List parts = Splitter.on(',').limit(3).splitToList(str);
checkKeyFormat(parts.size() == 3, str);
Integer changeId = Ints.tryParse(parts.get(0));
checkKeyFormat(changeId != null, str);
Integer patchSetNum = Ints.tryParse(parts.get(1));
checkKeyFormat(patchSetNum != null, str);
return key(PatchSet.id(Change.id(changeId), patchSetNum), parts.get(2));
}
private static void checkKeyFormat(boolean test, String input) {
checkArgument(test, "invalid patch key: %s", input);
}
public abstract PatchSet.Id patchSetId();
public abstract String fileName();
}
/** Type of modification made to the file path. */
public enum ChangeType implements CodedEnum {
/** Path is being created/introduced by this patch. */
ADDED('A'),
/** Path already exists, and has updated content. */
MODIFIED('M'),
/** Path existed, but is being removed by this patch. */
DELETED('D'),
/** Path existed at the source but was moved. */
RENAMED('R'),
/** Path was copied from the source. */
COPIED('C'),
/** Sufficient amount of content changed to claim the file was rewritten. */
REWRITE('W');
private final char code;
ChangeType(char c) {
code = c;
}
@Override
public char getCode() {
return code;
}
@UsedAt(UsedAt.Project.COLLABNET)
public static ChangeType forCode(char c) {
for (ChangeType s : ChangeType.values()) {
if (s.code == c) {
return s;
}
}
return null;
}
}
/** Type of formatting for this patch. */
public enum PatchType implements CodedEnum {
/**
* A textual difference between two versions.
*
* A UNIFIED patch can be rendered in multiple ways. Most commonly, it is rendered as a side
* by side display using two columns, left column for the old version, right column for the new
* version. A UNIFIED patch can also be formatted in a number of standard "patch script" styles,
* but typically is formatted in the POSIX standard unified diff format.
*
*
Usually Gerrit renders a UNIFIED patch in a PatchScreen.SideBySide view, presenting the
* file in two columns. If the user chooses, a PatchScreen.Unified is also a valid display
* method.
*/
UNIFIED('U'),
/**
* Difference of two (or more) binary contents.
*
*
A BINARY patch cannot be viewed in a text display, as it represents a change in binary
* content at the associated path, for example, an image file has been replaced with a different
* image.
*
*
Gerrit can only render a BINARY file in a PatchScreen.Unified view, as the only
* information it can display is the old and new file content hashes.
*/
BINARY('B');
private final char code;
PatchType(char c) {
code = c;
}
@Override
public char getCode() {
return code;
}
}
private Patch() {}
}