Refactor ReactEventEmitter to avoid using the method ReactContext.get…

…JSModule()

Summary:
This diff refactors ReactEventEmitter to not use the method ReactContext.getJSModule()
Since the initialization of events is performed by UIManagerModule or FabricUIManager classes we don't need to use JSModules as part of this class

Reviewed By: ejanzer

Differential Revision: D17176948

fbshipit-source-id: 6915a74b486851fbeda24f779d97873df22fd79b

ReactAndroid/src/main/java/com/facebook/react/uimanager/events/EventDispatcher.java

@@ -102,7 +102,7 @@ public int compare(Event lhs, Event rhs) {
   public EventDispatcher(ReactApplicationContext reactContext) {
     mReactContext = reactContext;
     mReactContext.addLifecycleEventListener(this);
-    mReactEventEmitter = new ReactEventEmitter(mReactContext);
+    mReactEventEmitter = new ReactEventEmitter();
   }
 
   /** Sends the given Event to JS, coalescing eligible events if JS is backed up. */

ReactAndroid/src/main/java/com/facebook/react/uimanager/events/ReactEventEmitter.java

@@ -11,21 +11,16 @@
 import android.util.SparseArray;
 import androidx.annotation.Nullable;
 import com.facebook.infer.annotation.Assertions;
-import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.WritableArray;
 import com.facebook.react.bridge.WritableMap;
 import com.facebook.react.uimanager.common.UIManagerType;
 import com.facebook.react.uimanager.common.ViewUtil;
 
 public class ReactEventEmitter implements RCTEventEmitter {
 
-  private static final String TAG = ReactEventEmitter.class.getSimpleName();
   private final SparseArray<RCTEventEmitter> mEventEmitters = new SparseArray<>();
-  private final ReactApplicationContext mReactContext;
 
-  public ReactEventEmitter(ReactApplicationContext reactContext) {
-    mReactContext = reactContext;
-  }
+  public ReactEventEmitter() {}
 
   public void register(@UIManagerType int uiManagerType, RCTEventEmitter eventEmitter) {
     mEventEmitters.put(uiManagerType, eventEmitter);
@@ -54,7 +49,7 @@ private RCTEventEmitter getEventEmitter(int reactTag) {
     int type = ViewUtil.getUIManagerType(reactTag);
     RCTEventEmitter eventEmitter = mEventEmitters.get(type);
     if (eventEmitter == null) {
-      eventEmitter = mReactContext.getJSModule(RCTEventEmitter.class);
+      throw new RuntimeException("Unable to find event emitter for type: " + type);
     }
     return eventEmitter;
   }