C++ JPType::canConvertToJava方法代码示例

void JPField::setStaticAttribute(HostRef* val)
{
    TRACE_IN("JPField::setStaticAttribute");

    if (m_IsFinal)
    {
        stringstream err;
        err << "Field " << m_Name << " is read-only";
        RAISE(JPypeException, err.str().c_str());
    }

    JPType* type = JPTypeManager::getType(m_Type);
    if (type->canConvertToJava(val) <= _explicit)
    {
        stringstream err;
        err << "unable to convert to " << type->getName().getSimpleName();
        RAISE(JPypeException, err.str().c_str());
    }

    JPCleaner cleaner;
    jclass claz = m_Class->getClass();
    cleaner.addLocal(claz);

    type->setStaticValue(claz, m_FieldID, val);
    TRACE_OUT;
}

void JPArray::setRange(int start, int stop, vector<HostRef*>& val)
{
	JPCleaner cleaner;
	
	JPType* compType = m_Class->getComponentType();
	
	if(stop < start)
	{
		std::stringstream out;
		out << "Slice start (" << start << ") is greater than stop ("
			<< stop << ")";
		RAISE(JPypeException, out.str());
	}

	unsigned int len = stop-start;
	size_t plength = val.size();
	
	if (len != plength)
	{
		std::stringstream out;
		out << "Slice assignment must be of equal lengths : " << len << " != " << plength;
		RAISE(JPypeException, out.str());
	}

	for (size_t i = 0; i < plength; i++)
	{
		HostRef* v = val[i];
		if ( compType->canConvertToJava(v)<= _explicit)
		{
			RAISE(JPypeException, "Unable to convert.");
		}
	}	
			
	compType->setArrayRange(m_Object, start, stop-start, val);
}	

void JPArray::setItem(int ndx, HostRef* val)
{
	JPType* compType = m_Class->getComponentType();
	if (compType->canConvertToJava(val) <= _explicit)
	{
		RAISE(JPypeException, "Unable to convert.");
	}	
	
	compType->setArrayItem(m_Object, ndx, val);
}

void JPField::setAttribute(jobject inst, HostRef* val)
{
    TRACE_IN("JPField::setAttribute");
    if (m_IsFinal)
    {
        stringstream err;
        err << "Field " << m_Name << " is read-only";
        RAISE(JPypeException, err.str().c_str());
    }

    JPType* type = JPTypeManager::getType(m_Type);
    if (type->canConvertToJava(val) <= _explicit)
    {
        stringstream err;
        err << "unable to convert to " << type->getName().getSimpleName();
        RAISE(JPypeException, err.str().c_str());
    }

    type->setInstanceValue(inst, m_FieldID, val);
    TRACE_OUT;
}

EMatchType JPMethodOverload::matches(bool ignoreFirst, vector<HostRef*>& arg)
{
	TRACE_IN("JPMethodOverload::matches");

	size_t len = arg.size();
	
	if (len != m_Arguments.size())
	{
		return _none;
	}
	
	EMatchType lastMatch = _exact;
	for (unsigned int i = 0; i < len; i++)
	{
		if (i == 0 && ignoreFirst)
		{
			continue;
		}

		HostRef* obj = arg[i];
		JPType* type = JPTypeManager::getType(m_Arguments[i]);
		
		EMatchType match = type->canConvertToJava(obj);
		if (match < _implicit)
		{
			return _none;
		}
		if (match < lastMatch)
		{
			lastMatch = match;
		}
	}
	
	return lastMatch;
	TRACE_OUT;
}

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.........