void JavaDataset::Init()

in language-extensions/java/src/JavaDataset.cpp [319:388]
54 lines of code
7 McCabe index (conditional complexity)

void JavaDataset::Init(JNIEnv *env, const string &className)
{
	LOG("JavaDataset::Init");

	if (env != nullptr)
	{
		m_env = env;

		// Max number of local references for this function are 2:
		// 1 for the dataset class
		// 1 for the object created
		//
		AutoJniLocalFrame jFrame(m_env, 2);

		jclass classLocalRef = m_env->FindClass(className.c_str());

		if (classLocalRef != nullptr)
		{
			m_class = static_cast<jclass>(m_env->NewGlobalRef(classLocalRef));

			if (m_class != nullptr)
			{
				jmethodID method = FindDatasetMethod("<init>", "()V");

				if (method != nullptr)
				{
					// Create the Dataset object
					//
					jobject data = m_env->NewObject(m_class, method);

					if (data != nullptr)
					{
						// Create a global reference on the new Dataset object
						//
						m_object = m_env->NewGlobalRef(data);

						if (m_object == nullptr)
						{
							throw runtime_error(
									"Could not create global reference for dataset object");
						}
					}
					else
					{
						JniHelper::ThrowOnJavaException(m_env, "Could not create dataset object");
						throw runtime_error("Could not create dataset object");
					}
				}
				else
				{
					JniHelper::ThrowOnJavaException(m_env, "Could not find dataset constructor");
					throw runtime_error("Could not find dataset constructor");
				}
			}
			else
			{
				throw runtime_error("Could not create global reference for dataset class");
			}
		}
		else
		{
			JniHelper::ThrowOnJavaException(m_env, "Could not find dataset class");
			throw runtime_error("Could not find dataset class");
		}
	}
	else
	{
		throw runtime_error("Invalid JNI enviroment");
	}
}