Interface that use ICityService interface to describe the rules (by defining SQL querys) of our methods

app/src/main/java/fr/romanet/vj/apps/myweather/dao/CityDao.java

@@ -0,0 +1,30 @@
+package fr.romanet.vj.apps.myweather.dao;
+
+import androidx.room.Dao;
+import androidx.room.Delete;
+import androidx.room.Insert;
+import androidx.room.OnConflictStrategy;
+import androidx.room.Query;
+import fr.romanet.vj.apps.myweather.ICityService;
+import fr.romanet.vj.apps.myweather.bo.City;
+import java.util.List;
+
+@Dao
+public interface CityDao extends ICityService
+{
+    @Override
+    @Query("SELECT * FROM City")
+    List<City> getCity();
+
+    @Override
+    @Delete
+    void deleteCity(City cityToDelete);
+
+    @Override
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    void addCity(City cityToAdd);
+
+    @Override
+    @Query("SELECT * FROM City ORDER BY nameCity DESC")
+    List<City> sortCityByName();
+}