1:  package com.voipplus.mmsclient.serviceManager;

   2:  

   3:  import android.app.Application;

   4:  import android.util.Log;

   5:  

   6:  import com.voipplus.mmsclient.httpService.HTTPService;

   7:  import com.voipplus.mmsclient.serviceLocalStorage.CryptoStorageService;

   8:  import com.voipplus.mmsclient.serviceLocalStorage.KeyValueService;

   9:  import com.voipplus.mmsclient.serviceMMS.MMSProcessingService;

  10:  import com.voipplus.mmsclient.WebRTC.WebRTCService;

  11:  

  12:  public class MyApplication extends Application {

  13:      private static final String TAG = "MyApplication";

  14:      public final ServiceLocatorReference serviceLocator = new ServiceLocatorReference();

  15:  

  16:      @Override

  17:      public void onCreate() {

  18:          super.onCreate();

  19:          Log.d(TAG, "onCreate: MyApplication started");

  20:          // Register service classes here

  21:          registerServiceClasses();

  22:      }

  23:  

  24:      private void registerServiceClasses() {

  25:          // Register service classes, not instances

  26:          serviceLocator.registerService(KeyValueService.class, null);

  27:          serviceLocator.registerService(CryptoStorageService.class, null);

  28:          serviceLocator.registerService(MMSProcessingService.class, null);

  29:          serviceLocator.registerService(HTTPService.class, null);

  30:          serviceLocator.registerService(WebRTCService.class, null);

  31:      }

  32:  

  33:      public <T> void registerServiceInstance(Class<T> serviceClass, T serviceInstance) {

  34:          serviceLocator.registerService(serviceClass, serviceInstance);

  35:      }

  36:  }

  37:  

   1:  package com.voipplus.mmsclient.serviceManager;

   2:  

   3:  public interface ServiceLocatorInterface {

   4:      <T> T getService(Class<T> serviceClass);

   5:  }

   6:  

   1:  package com.voipplus.mmsclient.serviceManager;

   2:  

   3:  import java.util.HashMap;

   4:  import java.util.Map;

   5:  

   6:  public class ServiceLocatorReference implements ServiceLocatorInterface {

   7:      private final Map<Class<?>, Object> services = new HashMap<>();

   8:  

   9:      @Override

  10:      public <T> T getService(Class<T> serviceClass) {

  11:          Object service = services.get(serviceClass);

  12:          if (serviceClass.isInstance(service)) {

  13:              return serviceClass.cast(service);

  14:          } else {

  15:              throw new IllegalArgumentException("Service " + serviceClass.getName() + " not found");

  16:          }

  17:      }

  18:  

  19:      public <T> void registerService(Class<T> serviceClass, T service) {

  20:          services.put(serviceClass, service);

  21:      }

  22:  }

  23: