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public class DataImpl extends AsyncTask<Void, Void, Object> implements IUrl {
GsonBuilder builder = new GsonBuilder();
Gson gson = builder.create();
private IResults what;
public DataImpl(IResults what) {
this.what = what;
}
@Override
protected Object doInBackground(Void... params) {
try {
String url = "";
if (what instanceof CategoriesList) {
url = URL + "cat";
} else if (what instanceof StudentsList) {
url = URL + "students?cat=" + ((StudentsList) what).category;
}
String json = IOUtils.toString(new URL(url));
fillResults(json, result, gson);
} catch (Exception ex) {
if (what instanceof CategoriesList) {
((CategoriesList) what).exception = ex;
} else if (what instanceof StudentsList) {
((StudentsList) what).exception = ex;
}
}
return what;
}
@Override
protected void onPostExecute(Object what) {
if (what instanceof IResults) {
Observer observer = ((IResults) what).getObserver();
if (observer != null) {
observer.update(null, what);
}
}
}
public static class CategoriesList extends ArrayList<Categoty> implements IResults {
public Exception exception;
public WeakReference<Observer> observer ;
@Override
public Observer getObserver() {
return observer == null ? null : observable.get();
}
}
public static class StudentsList extends ArrayList<Student> implements IResults {
public Exception exception;
public String category;
public WeakReference<Observer> observer ;
@Override
public Observer getObserver() {
return observer == null ? null : observable.get();
}
}
public interface IResults {
Observer getObserver();
}
}
это. все. слишком. %;?ч!2!!.