Create Java Part

package/android/src/main/cpp/AndroidFilamentProxy.cpp

@@ -8,16 +8,18 @@ namespace margelo {
 
 using namespace facebook;
 
-explicit AndroidFilamentProxy::AndroidFilamentProxy(jni::alias_ref<JFilamentProxy> filamentProxy)
-    : _filamentProxy(jni::make_global(filamentProxy)) {}
+AndroidFilamentProxy::AndroidFilamentProxy(jni::alias_ref<JFilamentProxy::javaobject> proxy)
+        : _proxy(jni::make_global(proxy)) {}
 
 AndroidFilamentProxy::~AndroidFilamentProxy() {
-  // Hermes GC might destroy HostObjects on an arbitrary Thread which might not be
-  // connected to the JNI environment. To make sure fbjni can properly destroy
-  // the Java method, we connect to a JNI environment first.
-  jni::ThreadScope::WithClassLoader([&] { _filamentProxy.reset(); });
+    // Hermes GC might destroy HostObjects on an arbitrary Thread which might not be
+    // connected to the JNI environment. To make sure fbjni can properly destroy
+    // the Java method, we connect to a JNI environment first.
+    jni::ThreadScope::WithClassLoader([&] { _proxy.reset(); });
 }
 
-int AndroidFilamentProxy::loadModel(const std::string& path) {
-  return _proxy->loadModel(path);
+int AndroidFilamentProxy::loadModel(const std::string &path) {
+    return _proxy->cthis()->loadModel(path);
 }
+
+} // namespace margelo

package/android/src/main/cpp/AndroidFilamentProxy.h

@@ -18,15 +18,15 @@ using namespace facebook;
  */
 class AndroidFilamentProxy : public FilamentProxy {
 public:
-  explicit AndroidFilamentProxy(jni::alias_ref<JFilamentProxy> filamentProxy);
+  explicit AndroidFilamentProxy(jni::alias_ref<JFilamentProxy::javaobject> filamentProxy);
   ~AndroidFilamentProxy();
 
 private:
   // TODO(hanno): implement
   int loadModel(const std::string& path);
 
 private:
-  jni::global_ref<JFilamentProxy> _proxy;
+  jni::global_ref<JFilamentProxy::javaobject> _proxy;
 };
 
 } // namespace margelo

package/android/src/main/cpp/Filament.cpp

@@ -1,6 +1,11 @@
 #include <fbjni/fbjni.h>
 #include <jni.h>
+#include "FilamentInstaller.h"
+#include "JFilamentProxy.h"
 
 JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void*) {
-  return facebook::jni::initialize(vm, [] { margelo::FilamentInstaller::registerNatives(); });
+  return facebook::jni::initialize(vm, [] {
+      margelo::FilamentInstaller::registerNatives();
+      margelo::JFilamentProxy::registerNatives();
+  });
 }

package/android/src/main/cpp/FilamentInstaller.cpp

@@ -0,0 +1,20 @@
+#include <jni.h>
+#include <fbjni/fbjni.h>
+#include <jsi/jsi.h>
+#include "FilamentInstaller.h"
+#include "AndroidFilamentProxy.h"
+
+namespace margelo {
+
+void FilamentInstaller::install(jni::alias_ref<jni::JClass> clazz,
+                                jni::alias_ref<JFilamentProxy::javaobject> proxy) {
+    jsi::Runtime& runtime = proxy->cthis()->getRuntime();
+    std::shared_ptr<AndroidFilamentProxy> filamentProxy = std::make_shared<AndroidFilamentProxy>(proxy);
+    runtime.global().setProperty(runtime, "__filamentProxy", jsi::Object::createFromHostObject(runtime, filamentProxy));
+}
+
+void FilamentInstaller::registerNatives() {
+    javaClassStatic()->registerNatives({makeNativeMethod("install", FilamentInstaller::install)});
+}
+
+} // namespace margelo

package/android/src/main/cpp/FilamentInstaller.h

@@ -4,6 +4,7 @@
 
 #include <fbjni/fbjni.h>
 #include <jni.h>
+#include "JFilamentProxy.h"
 
 namespace margelo {
 
@@ -13,7 +14,7 @@ class FilamentInstaller : public jni::JavaClass<FilamentInstaller> {
 public:
   static auto constexpr kJavaDescriptor = "Lcom/margelo/filament/FilamentInstaller;";
   static void registerNatives();
-  static void install(jni::alias_ref<jni::JClass> clazz, jni::alias_ref<JVisionCameraProxy::javaobject> proxy);
+  static void install(jni::alias_ref<jni::JClass> clazz, jni::alias_ref<JFilamentProxy::javaobject> proxy);
 };
 
 }; // namespace margelo

package/android/src/main/cpp/java-bindings/JFilamentProxy.cpp

@@ -18,16 +18,24 @@ JFilamentProxy::~JFilamentProxy() {
 }
 
 int JFilamentProxy::loadModel(const std::string& path) {
-  static const auto method = javaClassLocal()->getMethod<jint(jstring)>("loadModel");
-  return method(_javaPart, make_jstring(path));
+  static const auto method = javaClassLocal()->getMethod<jint(jni::alias_ref<jstring>)>("loadModel");
+  return method(_javaPart, jni::make_jstring(path));
+}
+
+jsi::Runtime& JFilamentProxy::getRuntime() {
+    if (_runtime == nullptr) {
+        [[unlikely]];
+        throw std::runtime_error("JSI Runtime was null!");
+    }
+    return *_runtime;
 }
 
 void JFilamentProxy::registerNatives() {
   registerHybrid({makeNativeMethod("initHybrid", JFilamentProxy::initHybrid)});
 }
 
 jni::local_ref<JFilamentProxy::jhybriddata>
-JFilamentProxy::initHybrid(alias_ref<jhybridobject> jThis, jlong jsRuntimePointer,
+JFilamentProxy::initHybrid(jni::alias_ref<jhybridobject> jThis, jlong jsRuntimePointer,
                            jni::alias_ref<facebook::react::CallInvokerHolder::javaobject> jsCallInvokerHolder) {
   __android_log_write(ANDROID_LOG_INFO, TAG, "Initializing JFilamentProxy...");
 

package/android/src/main/cpp/java-bindings/JFilamentProxy.h

@@ -24,6 +24,8 @@ class JFilamentProxy : public jni::HybridClass<JFilamentProxy> {
   // TODO(hanno): implement
   int loadModel(const std::string& path);
 
+  jsi::Runtime& getRuntime();
+
 private:
   friend HybridBase;
   jni::global_ref<JFilamentProxy::javaobject> _javaPart;

package/android/src/main/java/com/margelo/filament/FilamentInstaller.java

@@ -0,0 +1,6 @@
+package com.margelo.filament;
+
+/** @noinspection JavaJniMissingFunction*/
+public class FilamentInstaller {
+    public static native void install(FilamentProxy proxy);
+}

package/android/src/main/java/com/margelo/filament/FilamentProxy.java

@@ -1,5 +1,42 @@
 package com.margelo.filament;
 
+import androidx.annotation.Keep;
+import androidx.annotation.NonNull;
+
+import com.facebook.jni.HybridData;
+import com.facebook.proguard.annotations.DoNotStrip;
+import com.facebook.react.bridge.JavaScriptContextHolder;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.turbomodule.core.CallInvokerHolderImpl;
+import com.facebook.react.turbomodule.core.interfaces.CallInvokerHolder;
+
+/** @noinspection JavaJniMissingFunction*/
 class FilamentProxy {
+    /** @noinspection unused, FieldCanBeLocal */
+    @DoNotStrip
+    @Keep
+    private final HybridData hybridData;
+
+    FilamentProxy(@NonNull ReactApplicationContext context) {
+        JavaScriptContextHolder jsRuntimeHolder = context.getJavaScriptContextHolder();
+        if (jsRuntimeHolder == null) {
+            throw new RuntimeException("Failed to initialize react-native-filament: JSI Runtime Holder is null!");
+        }
+        Long runtimePointer = jsRuntimeHolder.get();
+        CallInvokerHolder callInvokerHolder = context.getCatalystInstance().getJSCallInvokerHolder();
+        if (!(callInvokerHolder instanceof CallInvokerHolderImpl)) {
+            throw new RuntimeException("Failed to initialize react-native-filament: JS Call Invoker is null!");
+        }
+        hybridData = initHybrid(runtimePointer, (CallInvokerHolderImpl) callInvokerHolder);
+    }
+
+    /** @noinspection unused*/
+    @DoNotStrip
+    @Keep
+    int loadModel(String path) {
+        // TODO(hanno): Implement Java part here
+        return 13;
+    }
 
+    private native HybridData initHybrid(Long jsRuntimePointer, CallInvokerHolderImpl callInvokerHolder);
 }

package/android/src/main/java/com/margelo/filament/FilamentViewManager.java

@@ -2,24 +2,31 @@
 
 import android.graphics.Color;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.module.annotations.ReactModule;
 import com.facebook.react.uimanager.ThemedReactContext;
 import com.facebook.react.uimanager.annotations.ReactProp;
 
 @ReactModule(name = FilamentViewManager.NAME)
 public class FilamentViewManager extends FilamentViewManagerSpec<FilamentView> {
-
   public static final String NAME = "FilamentView";
+  private final ReactApplicationContext context;
+  private FilamentProxy proxy = null;
+
+  FilamentViewManager(ReactApplicationContext context) {
+    this.context = context;
+  }
 
   @Override
-  public String getName() {
+  public @NonNull String getName() {
     return NAME;
   }
 
   @Override
-  public FilamentView createViewInstance(ThemedReactContext context) {
+  public @NonNull FilamentView createViewInstance(@NonNull ThemedReactContext context) {
     return new FilamentView(context);
   }
 
@@ -28,4 +35,25 @@ public FilamentView createViewInstance(ThemedReactContext context) {
   public void setColor(FilamentView view, @Nullable String color) {
     view.setBackgroundColor(Color.parseColor(color));
   }
+
+  @Override
+  public void initialize() {
+    super.initialize();
+
+    if (proxy != null) {
+      try {
+        System.loadLibrary("RNFilament");
+        proxy = new FilamentProxy(context);
+        FilamentInstaller.install(proxy);
+      } catch (Throwable cause) {
+        throw new RuntimeException("Failed to initialize react-native-filament! Reason: " + cause.getMessage(), cause);
+      }
+    }
+  }
+
+  @Override
+  public void onCatalystInstanceDestroy() {
+    super.onCatalystInstanceDestroy();
+    proxy = null;
+  }
 }

package/android/src/main/java/com/margelo/filament/FilamentViewPackage.java

@@ -1,6 +1,8 @@
 
 package com.margelo.filament;
 
+import androidx.annotation.NonNull;
+
 import com.facebook.react.ReactPackage;
 import com.facebook.react.bridge.NativeModule;
 import com.facebook.react.bridge.ReactApplicationContext;
@@ -12,14 +14,14 @@
 
 public class FilamentViewPackage implements ReactPackage {
   @Override
-  public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
+  public @NonNull List<ViewManager> createViewManagers(@NonNull ReactApplicationContext reactContext) {
     List<ViewManager> viewManagers = new ArrayList<>();
-    viewManagers.add(new FilamentViewManager());
+    viewManagers.add(new FilamentViewManager(reactContext));
     return viewManagers;
   }
 
   @Override
-  public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
+  public @NonNull List<NativeModule> createNativeModules(@NonNull ReactApplicationContext reactContext) {
     return Collections.emptyList();
   }
 }