CityGmtOffsetComparator.java revision 62b9f3d89a2be17f70d2fe45c1c94f732e0224a4 
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 */
16package com.android.deskclock.worldclock;
17
18import java.util.Comparator;
19import java.util.TimeZone;
20
21public class CityGmtOffsetComparator implements Comparator<CityObj> {
22
23    private CityNameComparator mNameComparator = null;
24
25    @Override
26    public int compare(CityObj c1, CityObj c2) {
27        int offset = TimeZone.getTimeZone(c1.mTimeZone).getRawOffset();
28        int offset2 = TimeZone.getTimeZone(c2.mTimeZone).getRawOffset();
29        return (offset < offset2) ? -1 : (offset > offset2) ? 1 :
30            getCityNameComparator().compare(c1, c2);
31    }
32
33    private CityNameComparator getCityNameComparator() {
34        if (mNameComparator == null) {
35            mNameComparator = new CityNameComparator();
36        }
37        return mNameComparator;
38    }
39}
40