Package com.db4o

Examples of com.db4o.ObjectSet

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    public void addUser(User user) {
        this.template.set(user);
    }
   
    public void removeUser(User user) {
        ObjectSet set = this.template.query(new UsernamePredicate(user.getUsername()));
        if (set.hasNext()) {
            this.template.delete(user);
        }
    }
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            this.template.delete(user);
        }
    }
   
    public User getUserByUsername(String username) {
        ObjectSet set = this.template.query(new UsernamePredicate(username));
        if (set.hasNext()) {
            User found = (User) set.next();
            found.setUserRepository(this);
            return found;
        } else {
            return null;
        }
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    throw new RuntimeException("do rollback");
  }

  public void listPilots() {
    Pilot proto = new Pilot(null, 0);
    ObjectSet result = template.get(proto);
    log.info("db contains pilots : " + result);
  }
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  }

  public static void retrieveAllPilots(ObjectContainer db) {
    Query query = db.query();
    query.constrain(Pilot.class);
    ObjectSet result = query.execute();
    listResult(result);
  }
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  public static void retrievePilotByName(ObjectContainer db) {
    Query query = db.query();
    query.constrain(Pilot.class);
    query.descend("name").constrain("Michael Schumacher");
    ObjectSet result = query.execute();
    listResult(result);
  }
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  public static void retrievePilotByExactPoints(ObjectContainer db) {
    Query query = db.query();
    query.constrain(Pilot.class);
    query.descend("points").constrain(new Integer(100));
    ObjectSet result = query.execute();
    listResult(result);
  }
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  public static void retrieveByNegation(ObjectContainer db) {
    Query query = db.query();
    query.constrain(Pilot.class);
    query.descend("name").constrain("Michael Schumacher").not();
    ObjectSet result = query.execute();
    listResult(result);
  }
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  public static void retrieveByConjunction(ObjectContainer db) {
    Query query = db.query();
    query.constrain(Pilot.class);
    Constraint constr = query.descend("name").constrain("Michael Schumacher");
    query.descend("points").constrain(new Integer(99)).and(constr);
    ObjectSet result = query.execute();
    listResult(result);
  }
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  public static void retrieveByDisjunction(ObjectContainer db) {
    Query query = db.query();
    query.constrain(Pilot.class);
    Constraint constr = query.descend("name").constrain("Michael Schumacher");
    query.descend("points").constrain(new Integer(99)).or(constr);
    ObjectSet result = query.execute();
    listResult(result);
  }
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  public static void retrieveByComparison(ObjectContainer db) {
    Query query = db.query();
    query.constrain(Pilot.class);
    query.descend("points").constrain(new Integer(99)).greater();
    ObjectSet result = query.execute();
    listResult(result);
  }
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Related Classes of com.db4o.ObjectSet

  • com.db4o.util.io.spikes.SimpleIoBenchmark
  • org.apache.lucene.gdata.storage.db4o.DB4oStorage
  • org.apache.lucene.gdata.storage.db4o.TestDb4oStorage
  • org.dmlite.model.persistent.db.db4o.Db4oModelContext
  • org.springmodules.db4o.examples.chapter1.FirstStepsExample
  • org.springmodules.db4o.examples.chapter1.QueryExample
  • org.springmodules.db4o.examples.Db4oService
  • org.springmodules.feedxt.infrastructure.dao.db4o.Db4oUserDao
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