How to initialise Google drive using GoogleCedentials instead of the deprecated GoogleCedential

Question

I have java code to connect to google drive using a service account, this works:

JsonFactory JSON_FACTORY = new GsonFactory();

GoogleCredential credential = GoogleCredential.fromStream(new FileInputStream("sa.json"))
                .createScoped(List.of(DriveScopes.DRIVE))
                .createDelegated("[email protected]");

return new Drive.Builder(GoogleNetHttpTransport.newTrustedTransport(), JSON_FACTORY, credential)
                .setApplicationName("my-drive-app")
                .build();

However i'm getting a deprecation warning that GoogleCredential is deprecated and that i should use GoogleCredentials (note the extra s at the end) from the google-auth-library instead.

I can initialise GoogleCredentials like this:

GoogleCredentials credential = GoogleCredentials.fromStream(new FileInputStream("sa.json"))
                .createScoped(List.of(DriveScopes.DRIVE))
                .createDelegated("[email protected]");

However I can't seem to figure out how to initialise the drive service using this new GoogleCredentials object. Passing it in in place of the credential object gives a compiler error and all of the official google drive java documentation refers the now deprecated method.

Can someone tell me how to initialise google drive using the new credentials object?

Versions I'm using:

    <dependency>
      <groupId>com.google.api-client</groupId>
      <artifactId>google-api-client</artifactId>
      <version>1.32.1</version>
    </dependency>
    <dependency>
      <groupId>com.google.oauth-client</groupId>
      <artifactId>google-oauth-client-jetty</artifactId>
      <version>1.32.1</version>
    </dependency>
    <dependency>
      <groupId>com.google.apis</groupId>
      <artifactId>google-api-services-drive</artifactId>
      <version>v3-rev20210919-1.32.1</version>
    </dependency>
    <dependency>
      <groupId>com.google.auth</groupId>
      <artifactId>google-auth-library-oauth2-http</artifactId>
      <version>1.2.0</version>
    </dependency>

Answer 1

To connect to Google Drive use the HttpCredentialsAdapter to make the connection from GoogleCredentials to GoogleCredential.

Sample:

return new Drive.Builder(GoogleNetHttpTransport.newTrustedTransport(), JSON_FACTORY, new HttpCredentialsAdapter(credential))
                .setApplicationName("my-drive-app")
                .build();