ORMLite with Dagger in Android

Question

Anyone can suggest how to marry ORMLite with Dagger in Android app?

Assume I have following layers:
UI [Activity] --> Business [POJO] --> DAO [ORMLite]

Each layer in injected to 'superior layer' with Dagger.
ORMLite creates DAO.

Know that there are a few options to init DAO from ORMLite. Let's call these [using ORMLite naming from examples]: "1. normal, 2. no helper, 3. no base".

The most natural here seems approach "no helper".
But maybe someone tested all approaches and can list pros / cons of each?

To be fair, I'd need to see more code to understand the architecture here, and what it is that needs to be injected, and when it is created. — EpicPandaForce, Jun 01 '15 at 20:58

score 1 · Answer 1 · answered Jun 18 '15 at 18:28

Finally I adatped approach from ORMLite's example "NoBase".

Create module which gives singleton of DatabaseHelper:

@Module(library = true, complete = false)
public class DbModule {

    @Provides
    @Singleton
    DatabaseHelper provideDatabaseHelper(Context context) {
        return new DatabaseHelper(context);
    }

    // ...

}

Where:

public class DatabaseHelper extends SQLiteOpenHelper {

    public DatabaseHelper(Context context, FileSystemService fileSystemService) {
        super(context, "/Path/To/MyDbFile.db", null, DB_VERSION);
    }

    // ...

}

And use DatabaseHelper in you business modules to do DB inserts, queries, etc.

@Module(library = true, complete = false)
public class BusinessModule {

    @Provides
    @Singleton
    MyService provideMyService(DatabaseHelper databaseHelper) {
        MyService s = new MyServiceImpl(databaseHelper);
        return s;
    }

    ...

}

Note: this solution is not yet supporting transactions - this feat. still waits for implementing.

ORMLite with Dagger in Android

1 Answers1