EMatchType JPClassType::canConvertToJava(HostRef* obj)
{
JPCleaner cleaner;
if (JPEnv::getHost()->isNone(obj))
{
return _implicit;
}
if (JPEnv::getHost()->isClass(obj))
{
return _exact;
}
if (JPEnv::getHost()->isWrapper(obj))
{
JPTypeName name = JPEnv::getHost()->getWrapperTypeName(obj);
if (name.getType() == JPTypeName::_class)
{
return _exact;
}
}
return _none;
}
EMatchType JPDoubleType::canConvertToJava(HostRef* obj)
{
if (JPEnv::getHost()->isNone(obj))
{
return _none;
}
if (JPEnv::getHost()->isFloat(obj))
{
if (JPEnv::getHost()->isObject(obj))
{
return _implicit;
}
return _exact;
}
if (JPEnv::getHost()->isWrapper(obj))
{
JPTypeName name = JPEnv::getHost()->getWrapperTypeName(obj);
if (name.getType() == JPTypeName::_double)
{
return _exact;
}
}
// Java allows conversion to any type with a longer range even if lossy
if (JPEnv::getHost()->isInt(obj) || JPEnv::getHost()->isLong(obj))
{
return _implicit;
}
return _none;
}
HostRef* JPClass::asHostObject(jvalue obj)
{
TRACE_IN("JPClass::asPyObject");
if (obj.l == NULL)
{
return JPEnv::getHost()->getNone();
}
JPTypeName name = JPJni::getClassName(obj.l);
if (name.getType() ==JPTypeName::_array)
{
JPType* arrayType = JPTypeManager::getType(name);
return arrayType->asHostObject(obj);
}
return JPEnv::getHost()->newObject(new JPObject(name, obj.l));
TRACE_OUT;
}
EMatchType JPStringType::canConvertToJava(HostRef* obj)
{
TRACE_IN("JPStringType::canConvertToJava");
JPCleaner cleaner;
if (obj == NULL || JPEnv::getHost()->isNone(obj))
{
return _implicit;
}
if (JPEnv::getHost()->isString(obj))
{
return _exact;
}
if (JPEnv::getHost()->isWrapper(obj))
{
JPTypeName name = JPEnv::getHost()->getWrapperTypeName(obj);
if (name.getType() == JPTypeName::_string)
{
return _exact;
}
}
if (JPEnv::getHost()->isObject(obj))
{
JPObject* o = JPEnv::getHost()->asObject(obj);
JPClass* oc = o->getClass();
if (oc->getName().getSimpleName() == "java.lang.String")
{
return _exact;
}
}
return _none;
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();
cleaner.addLocal(obj);
JPEnv::getJava()->Throw((jthrowable)obj);
}
else
{
JPEnv::getJava()->ThrowNew(JPJni::s_RuntimeExceptionClass, "Python exception thrown");
}
}
catch(JavaException*)
{
cerr << "Java exception at " << __FILE__ << ":" << __LINE__ << endl;
}
catch(JPypeException* ex)
{
JPEnv::getJava()->ThrowNew(JPJni::s_RuntimeExceptionClass, ex->getMsg());
}
JPEnv::getHost()->prepareCallbackFinish(callbackState);
return NULL;
TRACE_OUT;
}