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      1 /*
      2  * Copyright (C) 2016 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 
     17 package android.webkit;
     18 
     19 import android.annotation.SystemApi;
     20 import android.annotation.UnsupportedAppUsage;
     21 import android.os.RemoteException;
     22 
     23 /**
     24  * @hide
     25  */
     26 @SystemApi
     27 public final class WebViewUpdateService {
     28 
     29     @UnsupportedAppUsage
     30     private WebViewUpdateService () {}
     31 
     32     /**
     33      * Fetch all packages that could potentially implement WebView.
     34      */
     35     public static WebViewProviderInfo[] getAllWebViewPackages() {
     36         IWebViewUpdateService service = getUpdateService();
     37         if (service == null) {
     38             return new WebViewProviderInfo[0];
     39         }
     40         try {
     41             return service.getAllWebViewPackages();
     42         } catch (RemoteException e) {
     43             throw e.rethrowFromSystemServer();
     44         }
     45     }
     46 
     47     /**
     48      * Fetch all packages that could potentially implement WebView and are currently valid.
     49      */
     50     public static WebViewProviderInfo[] getValidWebViewPackages() {
     51         IWebViewUpdateService service = getUpdateService();
     52         if (service == null) {
     53             return new WebViewProviderInfo[0];
     54         }
     55         try {
     56             return service.getValidWebViewPackages();
     57         } catch (RemoteException e) {
     58             throw e.rethrowFromSystemServer();
     59         }
     60     }
     61 
     62     /**
     63      * Used by DevelopmentSetting to get the name of the WebView provider currently in use.
     64      */
     65     public static String getCurrentWebViewPackageName() {
     66         IWebViewUpdateService service = getUpdateService();
     67         if (service == null) {
     68             return null;
     69         }
     70         try {
     71             return service.getCurrentWebViewPackageName();
     72         } catch (RemoteException e) {
     73             throw e.rethrowFromSystemServer();
     74         }
     75     }
     76 
     77     private static IWebViewUpdateService getUpdateService() {
     78         return WebViewFactory.getUpdateService();
     79     }
     80 }
     81