如何映射来自不同数据源的两个模型？

Question

I'm facing an issue in a project I'm currently developing.

I've been following package by feature structure for grouping my classes, and this is basically the structure I have:

 - data 
 - local 
  - model 
   - LocalModel.java
 - remote 
  - model
   - RemoteModel.java  
 - ui 
  - features 

Both models contains exactly the same attributes, ie:

RemoteModel.java

public class RemoteModel implements Parcelable {
   private String name; //has getter and setter
   ...
}

LocalModel.java

public class LocalModel implements Parcelable {
   private String name; //has getter and setter
   ...
}

Under the features package, I have an Activity for showing up the details of the models. The thing is, that the Activity can be started holding either a RemoteModel or a LocalModel object. But, as part of the attributes of that Activity it just has an RemoteModel attr, as follow:

public class DetailsActivity extends AppCompartActivity {
   ...
   private TextView mName;
   private RemoteModel mRemoteModel;
   ...

   public void onCreate(Bundle savedInstanceState) {
      ...
      mRemoteModel = getIntent().getExtras().getParcelable(EXTRA_RESULT_TITLE);
      ...
      mName.setText(mRemoteModel.getName());
   }
}

That way it works fine until I run the app, and tap on view details button then the following beatiful error appears:

java.lang.ClassCastException: com.carlosparra.myApp.data.local.model.LocalModel cannot be cast to com.carlosparra.moviestvtracker.moviesandtvshowstracker.data.remote.model.RemoteModel

I know what the error means, so that's why I'm wondering how can I map those two classes from different data sources in an shared object that I can pass it to the details Activity.

Answer 1

You can define the necessary getters and setters in the interface Parcelable :

public interface Parcelable {

    String getName();

}

Then, instead of getting a RemoteModel in the activity, you get a Parcelable object:

public class DetailsActivity extends AppCompartActivity {
   ...
   private TextView mName;
   private Parcelable mParcelable;
   ...

   public void onCreate(Bundle savedInstanceState) {
      ...
      mParcelable = getIntent().getExtras().getParcelable(EXTRA_RESULT_TITLE);
      ...
      mName.setText(mParcelable.getName());
   }
}