1 /*
2  * Copyright (C) 2013 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.deskclock.worldclock;
17 
18 import java.util.Comparator;
19 import java.util.TimeZone;
20 
21 public class CityGmtOffsetComparator implements Comparator<CityObj> {
22 
23     private CityNameComparator mNameComparator = null;
24 
25     @Override
compare(CityObj c1, CityObj c2)26     public int compare(CityObj c1, CityObj c2) {
27         long currentTime = System.currentTimeMillis();
28         int offset = TimeZone.getTimeZone(c1.mTimeZone).getOffset(currentTime);
29         int offset2 = TimeZone.getTimeZone(c2.mTimeZone).getOffset(currentTime);
30         return (offset < offset2) ? -1 : (offset > offset2) ? 1 :
31             getCityNameComparator().compare(c1, c2);
32     }
33 
getCityNameComparator()34     private CityNameComparator getCityNameComparator() {
35         if (mNameComparator == null) {
36             mNameComparator = new CityNameComparator();
37         }
38         return mNameComparator;
39     }
40 }
41