C++ JPType::convertToJavaObject方法代码示例

jvalue JPClass::convertToJava(HostRef* obj)
{
	jvalue res;
	JPCleaner cleaner;

	res.l = NULL;

	// assume it is convertible;
	if (JPEnv::getHost()->isNone(obj))
	{
		res.l = NULL;
	}

	string simpleName = m_Name.getSimpleName();	
	if (JPEnv::getHost()->isInt(obj) && (simpleName == "java.lang.Byte" || simpleName == "java.lang.Short" ||
	    simpleName == "java.lang.Integer"))
	{
		return buildObjectWrapper(obj);
	}    	
	
	if ((JPEnv::getHost()->isInt(obj) || JPEnv::getHost()->isLong(obj)) && simpleName == "java.lang.Long" && JPEnv::getHost()->isLong(obj))
	{
		return buildObjectWrapper(obj);
	}
	
	if (JPEnv::getHost()->isFloat(obj) && (simpleName == "java.lang.Float" || simpleName == "java.lang.Double"))
	{
		if (JPEnv::getHost()->isFloat(obj))
		{
			return buildObjectWrapper(obj);
		}
	}    	

	if (JPEnv::getHost()->isString(obj))
	{
		JPTypeName name = JPTypeName::fromSimple("java.lang.String");
		JPType* type = JPTypeManager::getType(name);
		return type->convertToJava(obj);
	}

	if (JPEnv::getHost()->isObject(obj))
	{
		JPObject* ref = JPEnv::getHost()->asObject(obj);
		res.l = ref->getObject();
	}

	if (JPEnv::getHost()->isProxy(obj))
	{
		JPProxy* proxy = JPEnv::getHost()->asProxy(obj);
		res.l = proxy->getProxy();
	}

	if (JPEnv::getHost()->isWrapper(obj))
	{
		res = JPEnv::getHost()->getWrapperValue(obj);
	}

	if (JPEnv::getHost()->isInt(obj))
	{
		JPTypeName tname = JPTypeName::fromType(JPTypeName::_int);
		JPType* t = JPTypeManager::getType(tname);
		res.l = t->convertToJavaObject(obj);
	}
	
	if (JPEnv::getHost()->isLong(obj))
	{
		JPTypeName tname = JPTypeName::fromType(JPTypeName::_long);
		JPType* t = JPTypeManager::getType(tname);
		res.l = t->convertToJavaObject(obj);
	}
	
	if (JPEnv::getHost()->isFloat(obj))
	{
		JPTypeName tname = JPTypeName::fromType(JPTypeName::_double);
		JPType* t = JPTypeManager::getType(tname);
		res.l = t->convertToJavaObject(obj);
	}

	if (JPEnv::getHost()->isBoolean(obj))
	{
		JPTypeName tname = JPTypeName::fromType(JPTypeName::_boolean);
		JPType* t = JPTypeManager::getType(tname);
		res.l = t->convertToJavaObject(obj);
	}

	if (JPEnv::getHost()->isArray(obj) && simpleName == "java.lang.Object")
	{
		JPArray* a = JPEnv::getHost()->asArray(obj);
		res = a->getValue();		
	}

	return res;
}

JNIEXPORT jobject JNICALL Java_jpype_JPypeInvocationHandler_hostInvoke(
	JNIEnv *env, jclass clazz, jstring name, 
	jlong hostObj, jobjectArray args, 
	jobjectArray types, jclass returnType)
{
	TRACE_IN("Java_jpype_JPypeInvocationHandler_hostInvoke");

	void* callbackState = JPEnv::getHost()->prepareCallbackBegin();

	JPCleaner cleaner;

	try {
		string cname = JPJni::asciiFromJava(name);

		HostRef* hostObjRef = (HostRef*)hostObj;

		HostRef* callable = JPEnv::getHost()->getCallableFrom(hostObjRef, cname);
		cleaner.add(callable);

		if (callable == NULL || callable->isNull() || JPEnv::getHost()->isNone(callable))
		{
			JPEnv::getJava()->ThrowNew(JPJni::s_NoSuchMethodErrorClass, cname.c_str());
			JPEnv::getHost()->prepareCallbackFinish(callbackState);
			return NULL;
		}
					
		// convert the arguments into a python list
		jsize argLen = JPEnv::getJava()->GetArrayLength(types);
		vector<HostRef*> hostArgs;
		std::vector<JPTypeName> argTypes;

		for (jsize j = 0; j < argLen; j++)
		{
			jclass c = (jclass)JPEnv::getJava()->GetObjectArrayElement(types, j);
			cleaner.addLocal(c);
			JPTypeName tn = JPJni::getName(c);
			argTypes.push_back(tn);
		}

		for (int i = 0; i < argLen; i++)
		{
			jobject obj = JPEnv::getJava()->GetObjectArrayElement(args, i);
			cleaner.addLocal(obj);
			JPTypeName t = argTypes[i];

			jvalue v;
			v.l = obj;

			HostRef* o = JPTypeManager::getType(t)->asHostObjectFromObject(v);
			cleaner.add(o);
			hostArgs.push_back(o);

		}

		HostRef* returnValue = JPEnv::getHost()->callObject(callable, hostArgs);
		cleaner.add(returnValue);

		JPTypeName returnT = JPJni::getName(returnType);

		if (returnValue == NULL || returnValue->isNull() || JPEnv::getHost()->isNone(returnValue))
		{
			if (returnT.getType() != JPTypeName::_void && returnT.getType() < JPTypeName::_object)
			{
				JPEnv::getJava()->ThrowNew(JPJni::s_RuntimeExceptionClass, "Return value is None when it cannot be");
				JPEnv::getHost()->prepareCallbackFinish(callbackState);
				return NULL;
			}
		}

		if (returnT.getType() == JPTypeName::_void)
		{
			JPEnv::getHost()->prepareCallbackFinish(callbackState);
			return NULL;
		}

		JPType* rt = JPTypeManager::getType(returnT);
		if (rt->canConvertToJava(returnValue) == _none)
		{
			JPEnv::getJava()->ThrowNew(JPJni::s_RuntimeExceptionClass, "Return value is not compatible with required type.");
			JPEnv::getHost()->prepareCallbackFinish(callbackState);
			return NULL;
		}
		
		jobject returnObj = rt->convertToJavaObject(returnValue);

		JPEnv::getHost()->prepareCallbackFinish(callbackState);

		return returnObj;

	}
	catch(HostException* ex) 
	{ 
		JPEnv::getHost()->clearError();
		if (JPEnv::getHost()->isJavaException(ex))
		{
			JPCleaner cleaner;
			HostRef* javaExcRef = JPEnv::getHost()->getJavaException(ex);
			JPObject* javaExc = JPEnv::getHost()->asObject(javaExcRef);
			cleaner.add(javaExcRef);
			jobject obj = javaExc->getObject();
//.........这里部分代码省略.........