| // Copyright (C) 2017 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.client.change; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.gerrit.common.Nullable; |
| import com.google.gerrit.common.PageLinks; |
| import com.google.gerrit.reviewdb.client.Change; |
| import com.google.gerrit.reviewdb.client.Project; |
| import java.util.Objects; |
| |
| /** Provides logic for parsing a numeric change id and project from a URL. */ |
| public class ProjectChangeId { |
| |
| /** Parses a {@link ProjectChangeId} from it's string representation. */ |
| public static ProjectChangeId create(String token) { |
| String mutableToken = token; |
| // Try parsing /c/project/+/numericChangeId where token is project/+/numericChangeId |
| int delimiter = mutableToken.indexOf(PageLinks.PROJECT_CHANGE_DELIMITER); |
| Project.NameKey project = null; |
| if (delimiter > 0) { |
| project = new Project.NameKey(token.substring(0, delimiter)); |
| mutableToken = |
| mutableToken.substring(delimiter + PageLinks.PROJECT_CHANGE_DELIMITER.length()); |
| } |
| |
| // Try parsing /c/numericChangeId where token is numericChangeId |
| int s = mutableToken.indexOf('/'); |
| if (s > 0) { |
| mutableToken = mutableToken.substring(0, s); |
| } |
| // Special case: project/+/1233,edit/ |
| s = mutableToken.indexOf(",edit"); |
| if (s > 0) { |
| mutableToken = mutableToken.substring(0, s); |
| } |
| Integer cId = tryParse(mutableToken); |
| if (cId != null) { |
| return new ProjectChangeId(project, new Change.Id(cId)); |
| } |
| |
| throw new IllegalArgumentException(token + " is not a valid change identifier"); |
| } |
| |
| @Nullable private final Project.NameKey project; |
| private final Change.Id changeId; |
| |
| @VisibleForTesting |
| ProjectChangeId(@Nullable Project.NameKey project, Change.Id changeId) { |
| this.project = project; |
| this.changeId = changeId; |
| } |
| |
| @Nullable |
| public Project.NameKey getProject() { |
| return project; |
| } |
| |
| public Change.Id getChangeId() { |
| return changeId; |
| } |
| |
| /** |
| * Calculate the length of the string representation of the change ID that was parsed from the |
| * token. |
| * |
| * @return the length of the {@link com.google.gerrit.reviewdb.client.Change.Id} if no project was |
| * parsed from the token. The length of {@link |
| * com.google.gerrit.reviewdb.client.Project.NameKey} + the delimiter + the length of {@link |
| * com.google.gerrit.reviewdb.client.Change.Id} otherwise. |
| */ |
| public int identifierLength() { |
| if (project == null) { |
| return String.valueOf(changeId).length(); |
| } |
| return PageLinks.toChangeId(project, changeId).length(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj instanceof ProjectChangeId) { |
| ProjectChangeId other = (ProjectChangeId) obj; |
| return Objects.equals(changeId, other.changeId) && Objects.equals(project, other.project); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(changeId, project); |
| } |
| |
| @Override |
| public String toString() { |
| return "ProjectChangeId.Result{changeId: " + changeId + ", project: " + project + "}"; |
| } |
| |
| private static Integer tryParse(String s) { |
| try { |
| return Integer.parseInt(s); |
| } catch (NumberFormatException e) { |
| return null; |
| } |
| } |
| } |