JNIEXPORT jstring JNICALL Java_jmtp_PortableDeviceContentImplWin32_createObjectWithPropertiesAndData
(JNIEnv* env, jobject obj, jobject jobjValues, jobject jobjFile)
{
//variabelen
HRESULT hr;
IPortableDeviceContent* pDeviceContent;
IPortableDeviceValues* pDeviceObjectValues;
jobject jobjValuesReference;
jstring jsFileLocation;
LPWSTR wszFileLocation;
DWORD dwBufferSize;
CComPtr<IStream> pFileStream;
CComPtr<IStream> pDeviceStream;
CComPtr<IPortableDeviceDataStream> pDeviceDataStream;
STATSTG fileStats;
BYTE* pBuffer;
DWORD dwReadFromStream;
LPWSTR wszObjectID;
jstring jsObjectID;
jmethodID mid;
//Methode implementatie
pDeviceContent = GetPortableDeviceContent(env, obj);
jobjValuesReference = RetrieveCOMReferenceFromCOMReferenceable(env, jobjValues);
pDeviceObjectValues = (IPortableDeviceValues*)ConvertComReferenceToPointer(env, jobjValuesReference);
//COM stream object aanmaken
mid = env->GetMethodID(env->FindClass("java/io/File"), "getAbsolutePath", "()Ljava/lang/String;");
jsFileLocation = (jstring)env->CallObjectMethod(jobjFile, mid);
wszFileLocation = (WCHAR*)env->GetStringChars(jsFileLocation, NULL);
hr = SHCreateStreamOnFileW(wszFileLocation, STGM_READ, &pFileStream);
env->ReleaseStringChars(jsFileLocation, (jchar*)wszFileLocation); //string resources terug vrijgeven
if(SUCCEEDED(hr))
{
//groote van het bestand bepalen
//(door een beperking in java op het gebied van unsigned integers, moeten we het wel in c++ doen)
pFileStream->Stat(&fileStats, STATFLAG_NONAME);
pDeviceObjectValues->SetUnsignedLargeIntegerValue(WPD_OBJECT_SIZE, fileStats.cbSize.QuadPart);
hr = pDeviceContent->CreateObjectWithPropertiesAndData(pDeviceObjectValues,
&pDeviceStream, &dwBufferSize, NULL);
if(SUCCEEDED(hr))
{
pDeviceStream->QueryInterface(IID_IPortableDeviceDataStream, (void**)&pDeviceDataStream);
//data kopieren
pBuffer = new BYTE[dwBufferSize];
dwReadFromStream = 0;
do
{
pFileStream->Read(pBuffer, dwBufferSize, &dwReadFromStream);
pDeviceDataStream->Write(pBuffer, dwReadFromStream, NULL);
}
while(dwReadFromStream > 0);
delete[] pBuffer;
hr = pDeviceDataStream->Commit(STGC_DEFAULT);
if(SUCCEEDED(hr))
{
pDeviceDataStream->GetObjectID(&wszObjectID);
jsObjectID = (jstring)env->NewString((jchar*)wszObjectID, wcslen(wszObjectID));
CoTaskMemFree(wszObjectID);
return jsObjectID;
}
else
{
ThrowCOMException(env, L"Couldn't commit the data to the portable device", hr);
}
}
else
{
ThrowCOMException(env, L"Couldn't create a COM stream object to the portable device", hr);
}
}
else
{
ThrowCOMException(env, L"Couldn't create a COM stream object to the file", hr);
}
return NULL;
}
