com.google.api.client.extensions.android.http.AndroidHttp Java Examples

public boolean authenticate(String AppName, String ScopeName)
{
    final GoogleSignInAccount SignInAccount = GoogleSignIn.getLastSignedInAccount(mActivityInstance);

    if(SignInAccount != null)
    {
        GoogleAccountCredential AccountCredential;
        Drive.Builder DriveBuilder;

        AccountCredential = GoogleAccountCredential.usingOAuth2(mActivityInstance, Collections.singleton(ScopeName));
        AccountCredential.setSelectedAccount(SignInAccount.getAccount());

        DriveBuilder = new Drive.Builder(AndroidHttp.newCompatibleTransport(), new GsonFactory(), AccountCredential);
        DriveBuilder.setApplicationName(AppName);
        mDriveService = DriveBuilder.build();

        return true;
    }

    Log.d(TAG, "You have to signin by select account before use this call!");
    return false;
}
 

/**
 * Handles the {@code result} of a completed sign-in activity initiated from {@link
 * #requestSignIn()}.
 */
private void handleSignInResult(Intent result) {
    GoogleSignIn.getSignedInAccountFromIntent(result)
            .addOnSuccessListener(googleAccount -> {
                    Log.d(TAG, "Signed in as " + googleAccount.getEmail());

                    // Use the authenticated account to sign in to the Drive service.
                    GoogleAccountCredential credential =
                        GoogleAccountCredential.usingOAuth2(
                                this, Collections.singleton(DriveScopes.DRIVE_FILE));
                    credential.setSelectedAccount(googleAccount.getAccount());
                    Drive googleDriveService =
                        new Drive.Builder(
                                AndroidHttp.newCompatibleTransport(),
                                new GsonFactory(),
                                credential)
                           .setApplicationName("Drive API Migration")
                           .build();

                    // The DriveServiceHelper encapsulates all REST API and SAF functionality.
                    // Its instantiation is required before handling any onClick actions.
                    mDriveServiceHelper = new DriveServiceHelper(googleDriveService);
                })
            .addOnFailureListener(exception -> Log.e(TAG, "Unable to sign in.", exception));
}
 

private void initFido2GAEService() {
    if (fido2Service != null) {
        return;
    }
    if (googleSignInAccount == null) {
        return;
    }
    GoogleAccountCredential credential =
            GoogleAccountCredential.usingAudience(
                    context, "server:client_id:" + Constants.SERVER_CLIENT_ID);
    credential.setSelectedAccountName(googleSignInAccount.getEmail());
    Log.d(TAG, "credential account name " + credential.getSelectedAccountName());

    Fido2RequestHandler.Builder builder =
            new Fido2RequestHandler.Builder(
                    AndroidHttp.newCompatibleTransport(), new AndroidJsonFactory(), credential)
                    .setGoogleClientRequestInitializer(
                            new GoogleClientRequestInitializer() {
                                @Override
                                public void initialize(AbstractGoogleClientRequest<?> abstractGoogleClientRequest)
                                        throws IOException {
                                    abstractGoogleClientRequest.setDisableGZipContent(true);
                                }
                            });
    fido2Service = builder.build();
}
 

@Override
protected CollectionResponsePlace doInBackground(Void... params) {


  Placeendpoint.Builder endpointBuilder = new Placeendpoint.Builder(
      AndroidHttp.newCompatibleTransport(), new JacksonFactory(), null);
 
  endpointBuilder = CloudEndpointUtils.updateBuilder(endpointBuilder);


  CollectionResponsePlace result;

  Placeendpoint endpoint = endpointBuilder.build();

  try {
    result = endpoint.listPlace().execute();
  } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    result = null;
  }
  return result;
}
 

/**
 * Calls appropriate CloudEndpoint to indicate that user checked into a place.
 *
 * @param params the place where the user is checking in.
 */
@Override
protected Void doInBackground(Void... params) {
  CheckIn checkin = new com.google.samplesolutions.mobileassistant.checkinendpoint.model.CheckIn();

  // Set the ID of the store where the user is.
  checkin.setPlaceId("StoreNo123");

  Checkinendpoint.Builder builder = new Checkinendpoint.Builder(
      AndroidHttp.newCompatibleTransport(), new JacksonFactory(), null);

  builder = CloudEndpointUtils.updateBuilder(builder);

  Checkinendpoint endpoint = builder.build();


  try {
    endpoint.insertCheckIn(checkin).execute();
  } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
  }

  return null;
}
 

@Override
protected CollectionResponsePlace doInBackground(Void... params) {


  Placeendpoint.Builder endpointBuilder = new Placeendpoint.Builder(
      AndroidHttp.newCompatibleTransport(), new JacksonFactory(), null);
 
  endpointBuilder = CloudEndpointUtils.updateBuilder(endpointBuilder);


  CollectionResponsePlace result;

  Placeendpoint endpoint = endpointBuilder.build();

  try {
    result = endpoint.listPlace().execute();
  } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    result = null;
  }
  return result;
}
 

/**
 * Calls appropriate CloudEndpoint to indicate that user checked into a place.
 *
 * @param params the place where the user is checking in.
 */
@Override
protected Void doInBackground(Void... params) {
  CheckIn checkin = new CheckIn();

  // Set the ID of the store where the user is.
  checkin.setPlaceId("StoreNo123");

  Checkinendpoint.Builder builder = new Checkinendpoint.Builder(
      AndroidHttp.newCompatibleTransport(), new JacksonFactory(), null);

  builder = CloudEndpointUtils.updateBuilder(builder);

  Checkinendpoint endpoint = builder.build();


  try {
    endpoint.insertCheckIn(checkin).execute();
  } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
  }

  return null;
}
 

@Override
protected CollectionResponsePlace doInBackground(Void... params) {


  Placeendpoint.Builder endpointBuilder = new Placeendpoint.Builder(
      AndroidHttp.newCompatibleTransport(), new JacksonFactory(), null);
 
  endpointBuilder = CloudEndpointUtils.updateBuilder(endpointBuilder);


  CollectionResponsePlace result;

  Placeendpoint endpoint = endpointBuilder.build();

  try {
    result = endpoint.listPlace().execute();
  } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    result = null;
  }
  return result;
}
 

/**
 * Calls appropriate CloudEndpoint to indicate that user checked into a place.
 *
 * @param params the place where the user is checking in.
 */
@Override
protected Void doInBackground(Void... params) {
  CheckIn checkin = new com.google.samplesolutions.mobileassistant.checkinendpoint.model.CheckIn();

  // Set the ID of the store where the user is.
  checkin.setPlaceId("StoreNo123");

  Checkinendpoint.Builder builder = new Checkinendpoint.Builder(
      AndroidHttp.newCompatibleTransport(), new JacksonFactory(), null);

  builder = CloudEndpointUtils.updateBuilder(builder);

  Checkinendpoint endpoint = builder.build();


  try {
    endpoint.insertCheckIn(checkin).execute();
  } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
  }

  return null;
}
 

/**
 * Called when the activity is first created. It displays the UI, checks
 * for the account previously chosen to sign in (if available), and
 * configures the service object.
 */
@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  settings = getSharedPreferences(TAG, 0);
  credential = GoogleAccountCredential.usingAudience(this, ClientCredentials.AUDIENCE);
  setAccountName(settings.getString(PREF_ACCOUNT_NAME, null));

  Tictactoe.Builder builder = new Tictactoe.Builder(
      AndroidHttp.newCompatibleTransport(), new GsonFactory(),
      credential);
  service = builder.build();

  if (credential.getSelectedAccountName() != null) {
    onSignIn();
  }

  Logger.getLogger("com.google.api.client").setLevel(LOGGING_LEVEL);
}
 

/**
 * Calls appropriate CloudEndpoint to indicate that user checked into a place.
 *
 * @param params the place where the user is checking in.
 */
@Override
protected Void doInBackground(PlaceInfo... params) {

  CheckIn checkin = new CheckIn();
  checkin.setPlaceId(params[0].getPlaceId());

  Builder endpointBuilder = new Shoppingassistant.Builder(
      AndroidHttp.newCompatibleTransport(), new JacksonFactory(),
      CloudEndpointBuilderHelper.getRequestInitializer());

  CheckInEndpoint checkinEndpoint =
      CloudEndpointBuilderHelper.updateBuilder(endpointBuilder).build().checkInEndpoint();

  try {
    checkinEndpoint.insert(checkin).execute();
  } catch (IOException e) {
    String message = e.getMessage();
    if (message == null) {
      message = e.toString();
    }
    log.warning("Exception when checking in =" + message);
  }
  return null;
}
 

private Mobilebackend getMBSEndpoint() {

        // check if credential has account name
        final GoogleAccountCredential gac = mCredential == null
                || mCredential.getSelectedAccountName() == null ? null : mCredential;

        // create HttpRequestInitializer
        HttpRequestInitializer hri = new HttpRequestInitializer() {
            @Override
            public void initialize(HttpRequest request) throws IOException {
                request.setBackOffPolicy(new ExponentialBackOffPolicy());
                if (gac != null) {
                    gac.initialize(request);
                }
            }
        };

        // build MBS builder
        // (specify gac or hri as the third parameter)
        return new Mobilebackend.Builder(AndroidHttp.newCompatibleTransport(), new GsonFactory(),
                hri)
                .setRootUrl(Consts.ENDPOINT_ROOT_URL).build();
    }
 

public EndpointsTaskBagImpl(TodoPreferences preferences,
                            LocalTaskRepository localRepository) {
    super(preferences, localRepository, null);

    // Production testing
    //TaskApi.Builder builder = new TaskApi.Builder(AndroidHttp.newCompatibleTransport(), new AndroidJsonFactory(), null);

    // Local testing
    TaskApi.Builder builder = new TaskApi.Builder(AndroidHttp.newCompatibleTransport(), new AndroidJsonFactory(), null)
            .setRootUrl("http://10.0.2.2:8080/_ah/api/")
            .setGoogleClientRequestInitializer(new GoogleClientRequestInitializer() {
                @Override
                public void initialize(AbstractGoogleClientRequest<?> abstractGoogleClientRequest) throws IOException {
                    abstractGoogleClientRequest.setDisableGZipContent(true);
                }
            });

    taskApiService = builder.build();

}
 

public static Messaging get(Context context){
    if (messagingService == null) {
        SharedPreferences settings = context.getSharedPreferences(
                "Watchpresenter", Context.MODE_PRIVATE);
        final String accountName = settings.getString(Constants.PREF_ACCOUNT_NAME, null);
        if(accountName == null){
            Log.i(Constants.LOG_TAG, "Cannot send message. No account name found");
        }
        else {
            GoogleAccountCredential credential = GoogleAccountCredential.usingAudience(context,
                    "server:client_id:" + Constants.ANDROID_AUDIENCE);
            credential.setSelectedAccountName(accountName);
            Messaging.Builder builder = new Messaging.Builder(AndroidHttp.newCompatibleTransport(),
                    new GsonFactory(), credential)
                    .setRootUrl(Constants.SERVER_URL);

            messagingService = builder.build();
        }
    }
    return messagingService;
}
 

/**
 * *
 *
 * @return ShoppingAssistant endpoints to the GAE backend.
 */
static ShoppingAssistant getEndpoints() {

    // Create API handler
    ShoppingAssistant.Builder builder = new ShoppingAssistant.Builder(
            AndroidHttp.newCompatibleTransport(),
            new AndroidJsonFactory(), getRequestInitializer())
            .setRootUrl(Constants.ROOT_URL)
            .setGoogleClientRequestInitializer(
                    new GoogleClientRequestInitializer() {
                        @Override
                        public void initialize(
                                final AbstractGoogleClientRequest<?>
                                        abstractGoogleClientRequest)
                                throws IOException {
                            abstractGoogleClientRequest
                                    .setDisableGZipContent(true);
                        }
                    }
            );

    return builder.build();
}
 

public void open(final TGBrowserCallBack<Object> cb){
	try {
		this.drive = null;
		this.folder = null;
		this.httpTransport = AndroidHttp.newCompatibleTransport();
		
		TGDriveBrowserLogin login = new TGDriveBrowserLogin(this.findActivity(), this.settings, new TGBrowserCallBack<GoogleAccountCredential>() {
			public void onSuccess(GoogleAccountCredential credential) {
				Drive.Builder builder = new Drive.Builder(TGDriveBrowser.this.httpTransport, GsonFactory.getDefaultInstance(), credential);
				builder.setApplicationName(findActivity().getString(R.string.gdrive_application_name));
				TGDriveBrowser.this.drive = builder.build();
				
				cb.onSuccess(null);
			}
			
			public void handleError(Throwable throwable) {
				cb.handleError(throwable);
			}
		});
		login.process();
	} catch (Throwable e) {
		cb.handleError(e);
	}
}
 

@Override
protected String doInBackground(String... params) {
    if (myApiService == null) {  // Only do this once
        MyApi.Builder builder = new MyApi.Builder(AndroidHttp.newCompatibleTransport(),
                new AndroidJsonFactory(), null)
                .setRootUrl("http://YOUR-PROJECT-ID.appspot.com/_ah/api/")
                .setGoogleClientRequestInitializer(new GoogleClientRequestInitializer() {
                    @Override
                    public void initialize(AbstractGoogleClientRequest<?> abstractGoogleClientRequest) throws IOException {
                        abstractGoogleClientRequest.setDisableGZipContent(true);
                    }
                });
        // end options for devappserver
        myApiService = builder.build();
    }

    try {
        return myApiService.sayHi(params[0]).execute().getData();
    } catch (IOException e) {
        return e.getMessage();
    }
}
 

@Override
protected String doInBackground(String... params) {
    if (myApiService == null) {  // Only do this once
        MyApi.Builder builder = new MyApi.Builder(AndroidHttp.newCompatibleTransport(),
                new AndroidJsonFactory(), null)
                .setRootUrl("https://YOUR-PROJECT-ID.appspot.com/_ah/api/")
                .setGoogleClientRequestInitializer(new GoogleClientRequestInitializer() {
                    @Override
                    public void initialize(AbstractGoogleClientRequest<?> abstractGoogleClientRequest) throws IOException {
                        abstractGoogleClientRequest.setDisableGZipContent(true);
                    }
                });
        // end options for devappserver
        myApiService = builder.build();
    }

    try {
        return myApiService.sayHi(params[0]).execute().getData();
    } catch (IOException e) {
        return e.getMessage();
    }
}
 

private void addServiceForAccount(AppAccount appAccount) {


    HttpTransport transport = AndroidHttp.newCompatibleTransport();
    JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();
    accountMap.put(
        appAccount,
        new DriveSyncManager(
            appAccount,
            AppSingleton.getInstance(applicationContext).getDataController(appAccount),
            transport,
            jsonFactory,
            applicationContext,
            driveSupplier,
            AppSingleton.getInstance(applicationContext)
                .getSensorEnvironment()
                .getDataController(appAccount)));
  }
 

private void initFido2GAEService() {
    if (fido2Service != null) {
        return;
    }
    if (googleSignInAccount == null) {
        return;
    }
    GoogleAccountCredential credential =
            GoogleAccountCredential.usingAudience(
                    context, "server:client_id:" + Constants.SERVER_CLIENT_ID);
    credential.setSelectedAccountName(googleSignInAccount.getEmail());
    Log.d(TAG, "credential account name " + credential.getSelectedAccountName());

    Fido2RequestHandler.Builder builder =
            new Fido2RequestHandler.Builder(
                    AndroidHttp.newCompatibleTransport(), new AndroidJsonFactory(), credential)
                    .setGoogleClientRequestInitializer(
                            new GoogleClientRequestInitializer() {
                                @Override
                                public void initialize(AbstractGoogleClientRequest<?> abstractGoogleClientRequest)
                                        throws IOException {
                                    abstractGoogleClientRequest.setDisableGZipContent(true);
                                }
                            });
    fido2Service = builder.build();
}
 

private void handleSignInResult(Intent result) {
    GoogleSignIn.getSignedInAccountFromIntent(result)
            .addOnSuccessListener(googleAccount -> {
                Log.d(TAG, "Signed in as " + googleAccount.getEmail());

                // Use the authenticated account to sign in to the Drive service.
                GoogleAccountCredential credential =
                        GoogleAccountCredential.usingOAuth2(
                                this, Arrays.asList(DriveScopes.DRIVE_FILE, DriveScopes.DRIVE_METADATA, DriveScopes.DRIVE_READONLY,
                                        DriveScopes.DRIVE_METADATA_READONLY, DriveScopes.DRIVE_PHOTOS_READONLY));
                credential.setSelectedAccount(googleAccount.getAccount());

                googleDriveService =
                        new com.google.api.services.drive.Drive.Builder(
                                AndroidHttp.newCompatibleTransport(),
                                new GsonFactory(),
                                credential)
                                .setApplicationName("Drive API DBSync")
                                .build();

                // The DriveServiceHelper encapsulates all REST API and SAF functionality.
                // Its instantiation is required before handling any onClick actions.
                //mDriveServiceHelper = new DriveServiceHelper(googleDriveService);
            })
            .addOnFailureListener(exception -> Log.e(TAG, "Unable to sign in.", exception));
}
 

private void handleSignInONRecnnect() {
    GoogleSignInAccount account = GoogleSignIn.getLastSignedInAccount(this);

    if  (account != null ){
        Log.d(TAG, "Signed in as " + account.getEmail());

        // Use the authenticated account to sign in to the Drive service.
        GoogleAccountCredential credential =
                GoogleAccountCredential.usingOAuth2(
                        this, Collections.singleton(DriveScopes.DRIVE_FILE));
        credential.setSelectedAccount(account.getAccount());

        googleDriveService =
                new com.google.api.services.drive.Drive.Builder(
                        AndroidHttp.newCompatibleTransport(),
                        new GsonFactory(),
                        credential)
                        .setApplicationName("Drive API DBSync")
                        .build();
    }
}
 

PubsubPublisher(Context context, String appname, String project, String topic,
                int credentialResourceId) throws IOException {
    mContext = context;
    mAppname = appname;
    mTopic = "projects/" + project + "/topics/" + topic;

    mHandlerThread = new HandlerThread("pubsubPublisherThread");
    mHandlerThread.start();
    mHandler = new Handler(mHandlerThread.getLooper());

    InputStream jsonCredentials = mContext.getResources().openRawResource(credentialResourceId);
    final GoogleCredential credentials;
    try {
        credentials = GoogleCredential.fromStream(jsonCredentials).createScoped(
                Collections.singleton(PubsubScopes.PUBSUB));
    } finally {
        try {
            jsonCredentials.close();
        } catch (IOException e) {
            Log.e(TAG, "Error closing input stream", e);
        }
    }
    mHandler.post(new Runnable() {
        @Override
        public void run() {
            mHttpTransport = AndroidHttp.newCompatibleTransport();
            JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();
            mPubsub = new Pubsub.Builder(mHttpTransport, jsonFactory, credentials)
                    .setApplicationName(mAppname).build();
        }
    });
}
 

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch(requestCode) {
        case REQUEST_AUTHORIZATION:
            if (resultCode == RESULT_OK) {
                gmailResultListener.onSuccess(mService);
            }
            break;

        case REQUEST_ACCOUNT_PICKER:
            if (resultCode == RESULT_OK && data != null &&
                    data.getExtras() != null) {
                String accountName =
                        data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
                if (accountName != null) {
                    SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(this).edit();
                    editor.putString(PREF_ACCOUNT_NAME,accountName);
                    editor.apply();

                    mCredential.setSelectedAccountName(accountName);

                    mService = new Gmail.Builder(
                                AndroidHttp.newCompatibleTransport(), JacksonFactory.getDefaultInstance(), mCredential)
                                .setApplicationName(AppUtils.getApplicationName(this))
                                .build();
                    gmailResultListener.onSuccess(mService);
                }

            }
            break;
    }
    finish();
}
 

/**
 * Retrieves the list of recommendations through appropriate CloudEndpoint.
 *
 * @param params the place for which to retrieve recommendations.
 * @return collection of retrieved recommendations.
 */
@Override
protected CollectionResponseRecommendation doInBackground(Place... params) {
  Recommendationendpoint.Builder endpointBuilder = new Recommendationendpoint.Builder(AndroidHttp.newCompatibleTransport(), new JacksonFactory(), null);
  endpointBuilder = CloudEndpointUtils.updateBuilder(endpointBuilder);
  CollectionResponseRecommendation result;
  Recommendationendpoint endpoint = endpointBuilder.build();
  try {
    result = endpoint.listRecommendation().execute();
  } catch (IOException e) {
    e.printStackTrace();
    result = null;
  }
  return result;
}
 

/**
 * Retrieves the list of offers through appropriate CloudEndpoint.
 * @param params the place for which to retrieve offers.
 * @return collection of retrieved offers.
 */
@Override
protected CollectionResponseOffer doInBackground(Place... params) {
    Offerendpoint.Builder endpointBuilder = new Offerendpoint.Builder(AndroidHttp.newCompatibleTransport(), new JacksonFactory(), null);
    endpointBuilder = CloudEndpointUtils.updateBuilder(endpointBuilder);
    CollectionResponseOffer result;
    Offerendpoint endpoint = endpointBuilder.build();
    try {
      result = endpoint.listOffer().execute();
    } catch (IOException e){
      e.printStackTrace();
      result=null;
    }
    return result;
}
 

private void checkGmailApiRequirements() {


        String accountName = PreferenceManager.getDefaultSharedPreferences(getContext())
                .getString(PREF_ACCOUNT_NAME, null);

        if (accountName != null) {
            GoogleAccountCredential mCredential = GoogleAccountCredential.usingOAuth2(
                    getContext().getApplicationContext(), Arrays.asList(SCOPES))
                    .setBackOff(new ExponentialBackOff());
            mCredential.setSelectedAccountName(accountName);

            if (!DeviceUtils.isGooglePlayServicesAvailable(getContext())) {
                DeviceUtils.acquireGooglePlayServices(getContext());
            }
            else{
                mService = new Gmail.Builder(
                        AndroidHttp.newCompatibleTransport(), JacksonFactory.getDefaultInstance(), mCredential)
                        .setApplicationName(AppUtils.getApplicationName(getContext()))
                        .build();
                authorized = true;
            }


        } else {
            GmailAuthorizationActivity.setListener(this);
            getContext().startActivity(new Intent(getContext(), GmailAuthorizationActivity.class));
        }

    }
 

public GCMIntentService() {
  super(PROJECT_NUMBER);
  Deviceinfoendpoint.Builder endpointBuilder = new Deviceinfoendpoint.Builder(
      AndroidHttp.newCompatibleTransport(), new JacksonFactory(),
      new HttpRequestInitializer() {
        public void initialize(HttpRequest httpRequest) {
        }
      });
  endpoint = CloudEndpointUtils.updateBuilder(endpointBuilder).build();
}
 

public MakeRequestTask(GoogleAccountCredential credential) {
    HttpTransport transport = AndroidHttp.newCompatibleTransport();
    JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();
    mService = new com.google.api.services.calendar.Calendar.Builder(
            transport, jsonFactory, credential)
            .setApplicationName("Google Calendar API Android Quickstart")
            .build();
}
 

/**
 * Calls appropriate CloudEndpoint to indicate that user checked into a place.
 *
 * @param params the place where the user is checking in.
 */
@Override
protected Void doInBackground(Void... params) {
  CheckIn checkin = new CheckIn();
  
  // Set the ID of the store where the user is. 
  // This would be replaced by the actual ID in the final version of the code. 
  checkin.setPlaceId("StoreNo123");

  Checkinendpoint.Builder builder = new Checkinendpoint.Builder(
      AndroidHttp.newCompatibleTransport(), new JacksonFactory(),
      null);
      
  builder = CloudEndpointUtils.updateBuilder(builder);

  Checkinendpoint endpoint = builder.build();
  

  try {
    endpoint.insertCheckIn(checkin).execute();
  } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
  }

  return null;
}