public interface IRepository
{
    IQueryable<T> Query<T>();
}

Realm realm = Realm.getInstance(this);

// All writes are wrapped in a transaction
// to facilitate safe multi threading
realm.beginTransaction();

// Add a person
Person person = realm.createObject(Person.class);
person.setName("Young Person");
person.setAge(14);

realm.commitTransaction();

RealmResults<User> result = realm.where(User.class)
                                 .greaterThan("age", 10)  // implicit AND
                                 .beginGroup()
                                      .equalTo("name", "Peter")
                                      .or()
                                      .contains("name", "Jo")
                                 .endGroup()
                                 .findAll();