xref: /expo/packages/expo-modules-core/android/src/main/cpp/JNIFunctionBody.cpp (revision e0f520f5)

// Copyright © 2021-present 650 Industries, Inc. (aka Expo)

#include "JNIFunctionBody.h"
#include "Exceptions.h"
#include "JavaReferencesCache.h"

namespace jni = facebook::jni;
namespace react = facebook::react;

namespace expo {

jni::local_ref<jni::JObject>
JNIFunctionBody::invoke(jobjectArray args) {
  // Do NOT use getClass here!
  // Method obtained from `getClass` will point to the overridden version of the method.
  // Because of that, it can't be cached - we will try to invoke the nonexistent method
  // if we receive an object of a different class than the one used to obtain the method id.
  // The only cacheable method id can be obtain from the base class.
  static const auto method = jni::findClassLocal("expo/modules/kotlin/jni/JNIFunctionBody")
    ->getMethod<jni::local_ref<jni::JObject>(jobjectArray)>(
      "invoke",
      "([Ljava/lang/Object;)Ljava/lang/Object;"
    );

  auto result = jni::Environment::current()->CallObjectMethod(this->self(), method.getId(), args);
  throwPendingJniExceptionAsCppException();
  return jni::adopt_local(static_cast<jni::JniType<jni::JObject>>(result));
}

void JNIAsyncFunctionBody::invoke(
  jobjectArray args,
  jobject promise
) {
  // Do NOT use getClass here!
  // Method obtained from `getClass` will point to the overridden version of the method.
  // Because of that, it can't be cached - we will try to invoke the nonexistent method
  // if we receive an object of a different class than the one used to obtain the method id.
  // The only cacheable method id can be obtain from the base class.
  static const auto method = jni::findClassLocal("expo/modules/kotlin/jni/JNIAsyncFunctionBody")
    ->getMethod<
      void(jobjectArray , jobject)
    >(
      "invoke",
      "([Ljava/lang/Object;Lexpo/modules/kotlin/jni/PromiseImpl;)V"
    );

  jni::Environment::current()->CallVoidMethod(this->self(), method.getId(), args, promise);
  throwPendingJniExceptionAsCppException();
}

} // namespace expo