rustore / RuStore Unreal Engine RemoteConfig
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API/Autodoc/Files/AndroidJavaObject.cpp.en.md

// Copyright Epic Games, Inc. All Rights Reserved.

#include “JavaMethodSignature.h”

using namespace RuStoreSDK;

AndroidJavaObject::AndroidJavaObject(FString className, bool bAsGlobalRef) { #if PLATFORM_ANDROID env = FAndroidApplication::GetJavaEnv(); javaClass = FAndroidApplication::FindJavaClass(TCHAR_TO_ANSI(*className));

FString methodSignature = "()V";
jmethodID constructor = FJavaWrapper::FindMethod(env, javaClass, "<init>", TCHAR_TO_ANSI(*methodSignature), false);

javaObject = env->NewObject(javaClass, constructor);
if (bAsGlobalRef) javaObject = env->NewGlobalRef(javaObject);

bIsGlobalRef = bAsGlobalRef;

#endif }

AndroidJavaObject::AndroidJavaObject(FString className, long cppPointer, bool bAsGlobalRef) { #if PLATFORM_ANDROID env = FAndroidApplication::GetJavaEnv(); javaClass = FAndroidApplication::FindJavaClass(TCHAR_TO_ANSI(*className));

if (cppPointer != 0)
{
    FString methodSignature = "(J)V";
    jmethodID constructor = FJavaWrapper::FindMethod(env, javaClass, "<init>", TCHAR_TO_ANSI(*methodSignature), false);

    javaObject = env->NewObject(javaClass, constructor, (jlong)cppPointer);
    if (bAsGlobalRef) javaObject = env->NewGlobalRef(javaObject);

    bIsGlobalRef = bAsGlobalRef;
}
else
{
    this->className = className;
    javaObject = NULL;

    bIsGlobalRef = false;
}

#endif }

#if PLATFORM_ANDROID AndroidJavaObject::AndroidJavaObject(jthrowable throwable) { env = FAndroidApplication::GetJavaEnv(); javaClass = env->GetObjectClass(throwable); javaObject = (jobject)throwable; }

AndroidJavaObject::AndroidJavaObject(jobject javaObject) { env = FAndroidApplication::GetJavaEnv(); javaClass = !env->IsSameObject(javaObject, nullptr) ? env->GetObjectClass(javaObject) : nullptr; this->javaObject = javaObject; }

AndroidJavaObject::AndroidJavaObject(jobject javaObject, FString asInterface) { env = FAndroidApplication::GetJavaEnv(); javaClass = !env->IsSameObject(javaObject, nullptr) ? env->GetObjectClass(javaObject) : nullptr; this->javaObject = javaObject; className = asInterface; }

AndroidJavaObject::AndroidJavaObject(jclass javaClass, jobject javaObject) { env = FAndroidApplication::GetJavaEnv(); this->javaClass = javaClass; this->javaObject = javaObject; }

jobject AndroidJavaObject::GetJObject() { return javaObject; } #endif

AndroidJavaObject::~AndroidJavaObject() { #if PLATFORM_ANDROID if (!env->IsSameObject(javaObject, nullptr)) { if (bIsGlobalRef) env->DeleteGlobalRef(javaObject); } if (bIsAttachThread) CurrentJavaVM()->DetachCurrentThread(); #endif }

void AndroidJavaObject::SetInterfaceName(FString asInterface)

bool AndroidJavaObject::AttachCurrentThread() { #if PLATFORM_ANDROID JNIEnv* newEnv = nullptr; jint attachResult = CurrentJavaVM()->AttachCurrentThread(&env, nullptr); bIsAttachThread = (attachResult == JNI_OK); if (bIsAttachThread) env = newEnv; #endif

return bIsAttachThread;

}

AndroidJavaObject* AndroidJavaObject::UpdateToGlobalRef() { #if PLATFORM_ANDROID javaObject = env->NewGlobalRef(javaObject); #endif bIsGlobalRef = true;

return this;

}

FString AndroidJavaObject::GetName() { if (className == "") className = ExtractName();

return className;

}

FString AndroidJavaObject::ExtractName() { FString nameFString = "";

#if PLATFORM_ANDROID jmethodID getNameMethodId = env->GetMethodID(javaClass, “getClass”, “()Ljava/lang/Class;”); jobject classObject = env->CallObjectMethod(javaObject, getNameMethodId); jclass objectClass = env->GetObjectClass(classObject);

jmethodID getNameId = env->GetMethodID(objectClass, "getName", "()Ljava/lang/String;");
jstring nameJString = (jstring)FJavaWrapper::CallObjectMethod(env, classObject, getNameId);
nameFString = FJavaHelper::FStringFromParam(env, nameJString);

#endif

return nameFString.Replace(TEXT("."), TEXT("/"));

}

template T* AndroidJavaObject::Get(FString fieldName) { #if PLATFORM_ANDROID jfieldID javaFieldId = env->GetFieldID(javaClass, TCHAR_TO_ANSI(*fieldName), “L”);

T* result = nullptr;
if (javaFieldId != nullptr)
{
    result = (T*)env->GetObjectField(javaObject, javaFieldId);
}

return result;

#endif return nullptr; }

int AndroidJavaObject::GetInt(FString fieldName) { int result = 0; #if PLATFORM_ANDROID jfieldID fieldId = env->GetFieldID(javaClass, TCHAR_TO_ANSI(*fieldName), TCHAR_TO_ANSI(*JavaMethodSignature::getName(result))); result = (int)env->GetIntField(javaObject, fieldId); #endif return result; }

long AndroidJavaObject::GetLong(FString fieldName) { long result = 0; #if PLATFORM_ANDROID jfieldID fieldId = env->GetFieldID(javaClass, TCHAR_TO_ANSI(*fieldName), TCHAR_TO_ANSI(*JavaMethodSignature::getName(result))); result = (long)env->GetLongField(javaObject, fieldId); #endif return result; }

bool AndroidJavaObject::GetBool(FString fieldName) { bool result = 0; #if PLATFORM_ANDROID jfieldID fieldId = env->GetFieldID(javaClass, TCHAR_TO_ANSI(*fieldName), TCHAR_TO_ANSI(*JavaMethodSignature::getName(result))); result = (long)env->GetBooleanField(javaObject, fieldId); #endif return result; }

FString AndroidJavaObject::GetFString(FString fieldName) { FString result = ""; #if PLATFORM_ANDROID jfieldID fieldId = env->GetFieldID(javaClass, TCHAR_TO_ANSI(*fieldName), TCHAR_TO_ANSI(*JavaMethodSignature::getName(result))); jstring strResult = (jstring)env->GetObjectField(javaObject, fieldId); if (strResult != nullptr) { result = FJavaHelper::FStringFromParam(env, strResult); } #endif return result; }

int AndroidJavaObject::GetEnum(FString fieldName, FString signature) { int result = 0; #if PLATFORM_ANDROID jfieldID fieldId = env->GetFieldID(javaClass, TCHAR_TO_ANSI(*fieldName), TCHAR_TO_ANSI(*JavaMethodSignature::getName(result))); result = (int)env->GetIntField(javaObject, fieldId); #endif return result; }

TArray* AndroidJavaObject::GetByteArray(FString fieldName) { TArray* result = new TArray();

#if PLATFORM_ANDROID FString signature = JavaMethodSignature::getName(result); jfieldID fieldId = env->GetFieldID(javaClass, TCHAR_TO_ANSI(*fieldName), TCHAR_TO_ANSI(*signature));

#ifdef RuStoreDebug _LogInfo(RuStoreDebug, signature); #endif

jbyteArray jArray = (jbyteArray)env->GetObjectField(javaObject, fieldId);
int length = env->GetArrayLength(jArray);
jbyte* data = env->GetByteArrayElements(jArray, nullptr);
for (int i = 0; i < length; i++) {
    result->Add(static_cast<uint8>(data[i]));
}
env->ReleaseByteArrayElements(jArray, data, 0);

#endif

return result;

}

AndroidJavaObject* AndroidJavaObject::GetStaticAJObject(FString fieldName, FString className) { AndroidJavaObject* result = nullptr;

#if PLATFORM_ANDROID JNIEnv* env = FAndroidApplication::GetJavaEnv(); jclass javaClass = FAndroidApplication::FindJavaClass(TCHAR_TO_ANSI(*className));

FString javaClassSignature = "L" + className + ";";
jfieldID javaFieldID = env->GetStaticFieldID(javaClass, TCHAR_TO_ANSI(*fieldName), TCHAR_TO_ANSI(*javaClassSignature));
jobject localRef = env->GetStaticObjectField(javaClass, javaFieldID);

if (localRef != nullptr)
{
    result = new AndroidJavaObject(javaClass, localRef);
    result->UpdateToGlobalRef();
}

#endif

return result;

}

AndroidJavaObject* AndroidJavaObject::GetAJObject(FString fieldName, FString signature) { if (signature == ““) { AndroidJavaObject* _javaClass = this->CallAJClass(“getClass”); FString _signature = “L” + _javaClass->CallFString(“getName”) + “;”; signature = _signature.Replace(TEXT(”.”), TEXT(“/”)); delete _javaClass; }

AndroidJavaObject* result = nullptr;

#ifdef RuStoreDebug _LogInfo(RuStoreDebug, signature); #endif

jfieldID fieldId = env->GetFieldID(javaClass, TCHAR_TO_ANSI(*fieldName), TCHAR_TO_ANSI(*signature));

jobject localRef = env->GetObjectField(javaObject, fieldId);
if (localRef != nullptr)
{
    result = new AndroidJavaObject(localRef);
    result->UpdateToGlobalRef();
}

#endif

return result;

}

AndroidJavaObject* AndroidJavaObject::GetAJObjectArrayElement(int i) { AndroidJavaObject* result = nullptr;

#if PLATFORM_ANDROID jobjectArray arr = reinterpret_cast(javaObject); jobject element = env->GetObjectArrayElement(arr, i);

if (element != nullptr)
{
    result = new AndroidJavaObject(element);
    result->UpdateToGlobalRef();
}

#endif

return result;

}

FString AndroidJavaObject::GetFStringArrayElement(int i) { FString result = "";

#if PLATFORM_ANDROID jobjectArray arr = reinterpret_cast(javaObject); jstring strResult = (jstring)env->GetObjectArrayElement(arr, i);

if (strResult != nullptr)
{
    result = FJavaHelper::FStringFromParam(env, strResult);
}

#endif

return result;

}

FString RuStoreSDK::AndroidJavaObject::ConvertToFString() { FString result = "";

#if PLATFORM_ANDROID jstring strResult = (jstring)javaObject; result = FJavaHelper::FStringFromParam(env, strResult); #endif

return result;

}

FString AndroidJavaObject::CallJavaClassFString(FString methodName) { FString nameFString = "";

#if PLATFORM_ANDROID jmethodID getNameMethodId = env->GetMethodID(javaClass, “getClass”, “()Ljava/lang/Class;”); jobject classObject = env->CallObjectMethod(javaObject, getNameMethodId); jclass objectClass = env->GetObjectClass(classObject);

jmethodID nameMethodId = env->GetMethodID(objectClass, TCHAR_TO_ANSI(*methodName), "()Ljava/lang/String;");
jstring nameJString = (jstring)env->CallObjectMethod(classObject, nameMethodId);
nameFString = FJavaHelper::FStringFromParam(env, nameJString);

return nameFString;

#endif

return FString();

}

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