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      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.compatibility.common.deviceinfo;
     17 
     18 import android.os.UserManager;
     19 
     20 import com.android.compatibility.common.util.DeviceInfoStore;
     21 
     22 import java.lang.reflect.Field;
     23 import java.lang.reflect.InvocationTargetException;
     24 import java.lang.reflect.Method;
     25 
     26 /**
     27  * User device info collector.
     28  */
     29 public final class UserDeviceInfo extends DeviceInfo {
     30 
     31     @Override
     32     protected void collectDeviceInfo(DeviceInfoStore store) throws Exception {
     33         store.addResult("max_supported_users", getMaxSupportedUsers());
     34     }
     35 
     36     private int getMaxSupportedUsers() {
     37         try {
     38             Method method = UserManager.class.getMethod("getMaxSupportedUsers");
     39             return (Integer) method.invoke(null);
     40         } catch (ClassCastException |
     41                 NoSuchMethodException |
     42                 InvocationTargetException |
     43                 IllegalAccessException e) {}
     44         return -1;
     45     }
     46 }
     47