CPLErr RasdamanDataset::IRasterIO( GDALRWFlag eRWFlag,
int nXOff, int nYOff, int nXSize, int nYSize,
void * pData, int nBufXSize, int nBufYSize,
GDALDataType eBufType,
int nBandCount, int *panBandMap,
GSpacing nPixelSpace, GSpacing nLineSpace,
GSpacing nBandSpace,
GDALRasterIOExtraArg* psExtraArg)
{
if (eRWFlag != GF_Read) {
CPLError(CE_Failure, CPLE_NoWriteAccess, "Write support is not implemented.");
return CE_Failure;
}
transaction.begin(r_Transaction::read_only);
/* TODO: Setup database access/transaction */
int dummyX, dummyY;
/* Cache the whole image region */
CPLDebug("rasdaman", "Pre-caching region (%d, %d, %d, %d).", nXOff, nXOff + nXSize, nYOff, nYOff + nYSize);
request_array(nXOff, nXOff + nXSize, nYOff, nYOff + nYSize, dummyX, dummyY);
CPLErr ret = GDALDataset::IRasterIO(eRWFlag, nXOff, nYOff, nXSize, nYSize, pData,
nBufXSize, nBufYSize, eBufType, nBandCount,
panBandMap, nPixelSpace, nLineSpace, nBandSpace,
psExtraArg);
transaction.commit();
/* Clear the cache */
clear_array_cache();
return ret;
}
QVariant RequestManager::processMessage(QString buffered_message)
{
// Parse function method and parameters
buffered_message.chop(1);
buffered_message.remove(0,1);
// First turn string into QJSonDocument
QJsonParseError error;
QJsonDocument document( QJsonDocument::fromJson(buffered_message.toLocal8Bit(),&error));
// Check if there was an error
if(error.error != QJsonParseError::NoError)
{
qDebug() << "Error Parsing incoming Json Message:" << error.errorString() << "\nMessage Recieved: " << buffered_message;
return QVariant();
}
// Begin Parsing Arguments
QJsonArray request_array (document.array());
QVariant parameter;
QJsonObject func = request_array.first().toObject();
int param_count = request_array.size()-1;
if(param_count > 1)
{
QVariantList params;
for(int i = 1; i < param_count+1; ++i)
{
params.append(request_array.at(i).toObject());
}
parameter.setValue(params);
}
else if( param_count == 1)
{
parameter = QVariant::fromValue(request_array.at(param_count).toObject());
}
else
{
parameter = QVariant();
}
QString functionname(func["FuncName"].toString());
QTcpSocket * caller(qobject_cast<QTcpSocket*>(sender()));
QVariant return_val = processRequest(functionname,caller,parameter);
if(!return_val.isNull())
{
QJsonObject obj = return_val.value<QJsonObject>();
QJsonDocument doc;
doc.setObject(obj);
QByteArray message(doc.toJson());
return_val = QVariant::fromValue(doc);
message.push_front("\001");
message.push_back("\004");
emit returnMessageReady(caller,message);
}
return return_val;
}
r_Ref<r_GMarray>& RasdamanDataset::request_array(int x_lo, int x_hi, int y_lo, int y_hi, int& offsetX, int& offsetY)
{
return request_array(Subset(x_lo, x_hi, y_lo, y_hi), offsetX, offsetY);
};
