1 /* 2 * Copyright (C) 2015 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.launcher3.model; 17 18 import android.content.Context; 19 20 import com.android.launcher3.ItemInfo; 21 import com.android.launcher3.compat.UserHandleCompat; 22 import com.android.launcher3.compat.UserManagerCompat; 23 24 import java.util.Comparator; 25 26 /** 27 * A comparator to arrange items based on user profiles. 28 */ 29 public abstract class AbstractUserComparator<T extends ItemInfo> implements Comparator<T> { 30 31 private final UserManagerCompat mUserManager; 32 private final UserHandleCompat mMyUser; 33 34 public AbstractUserComparator(Context context) { 35 mUserManager = UserManagerCompat.getInstance(context); 36 mMyUser = UserHandleCompat.myUserHandle(); 37 } 38 39 @Override 40 public int compare(T lhs, T rhs) { 41 if (mMyUser.equals(lhs.user)) { 42 return -1; 43 } else { 44 Long aUserSerial = mUserManager.getSerialNumberForUser(lhs.user); 45 Long bUserSerial = mUserManager.getSerialNumberForUser(rhs.user); 46 return aUserSerial.compareTo(bUserSerial); 47 } 48 } 49 } 50
