| // Copyright (C) 2009 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 java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| |
| public class LabelTypes { |
| protected List<LabelType> labelTypes; |
| private transient volatile Map<String, LabelType> byLabel; |
| private transient volatile Map<String, Integer> positions; |
| |
| protected LabelTypes() {} |
| |
| public LabelTypes(List<? extends LabelType> approvals) { |
| labelTypes = Collections.unmodifiableList(new ArrayList<>(approvals)); |
| } |
| |
| public List<LabelType> getLabelTypes() { |
| return labelTypes; |
| } |
| |
| public Optional<LabelType> byLabel(LabelId labelId) { |
| return Optional.ofNullable(byLabel().get(labelId.get().toLowerCase())); |
| } |
| |
| public Optional<LabelType> byLabel(String labelName) { |
| return Optional.ofNullable(byLabel().get(labelName.toLowerCase())); |
| } |
| |
| private Map<String, LabelType> byLabel() { |
| if (byLabel == null) { |
| synchronized (this) { |
| if (byLabel == null) { |
| Map<String, LabelType> l = new HashMap<>(); |
| if (labelTypes != null) { |
| for (LabelType t : labelTypes) { |
| l.put(t.getName().toLowerCase(), t); |
| } |
| } |
| byLabel = l; |
| } |
| } |
| } |
| return byLabel; |
| } |
| |
| @Override |
| public String toString() { |
| return labelTypes.toString(); |
| } |
| |
| public Comparator<String> nameComparator() { |
| final Map<String, Integer> positions = positions(); |
| return new Comparator<>() { |
| @Override |
| public int compare(String left, String right) { |
| int lp = position(left); |
| int rp = position(right); |
| int cmp = lp - rp; |
| if (cmp == 0) { |
| cmp = left.compareTo(right); |
| } |
| return cmp; |
| } |
| |
| private int position(String name) { |
| Integer p = positions.get(name); |
| return p != null ? p : positions.size(); |
| } |
| }; |
| } |
| |
| private Map<String, Integer> positions() { |
| if (positions == null) { |
| synchronized (this) { |
| if (positions == null) { |
| Map<String, Integer> p = new HashMap<>(); |
| if (labelTypes != null) { |
| int i = 0; |
| for (LabelType t : labelTypes) { |
| p.put(t.getName(), i++); |
| } |
| } |
| positions = p; |
| } |
| } |
| } |
| return positions; |
| } |
| } |