Which design pattern to apply

class A { doSomethingForA(); }

class B { doSomethingForB(); }

class LetsSaySomeResource {

  @Inject
  private A classAInstance;
  @Inject
  private B classBInstance;

  public void getDataBasedOnA(){   
    classAInstance.doSomethingForA();
  }
  public void getDataBasedOnB(){   
    classBInstance.doSomethingForB();
  }
}

Now the requirement is we want to fetch some data based on A and B both and later on maybe more classes like A and B will be added to get data based on this. How shall i make the design more flexible?

Like,

public void getDataBasedOnAandB(){
}

Or, later on C class can come, so i dont want to keep injecting filters like A,B.... Can someone help on this?