CPLErr GNMGenericNetwork::CheckLayerDriver(const char* pszDefaultDriverName,
char **papszOptions)
{
if(NULL == m_poLayerDriver)
{
const char* pszDriverName = CSLFetchNameValueDef(papszOptions,
GNM_MD_FORMAT,
pszDefaultDriverName);
if(!CheckStorageDriverSupport(pszDriverName))
{
CPLError( CE_Failure, CPLE_IllegalArg, "%s driver not supported as network storage",
pszDriverName );
return CE_Failure;
}
m_poLayerDriver = GetGDALDriverManager()->GetDriverByName(pszDriverName );
if(NULL == m_poLayerDriver)
{
CPLError( CE_Failure, CPLE_IllegalArg, "%s driver not available",
pszDriverName );
return CE_Failure;
}
}
return CE_None;
}
CPLErr GNMDatabaseNetwork::Create( const char* pszFilename, char** papszOptions )
{
FormName(pszFilename, papszOptions);
if(m_soName.empty() || m_soNetworkFullName.empty())
{
CPLError( CE_Failure, CPLE_IllegalArg,
"The network name should be present" );
return CE_Failure;
}
if(NULL == m_poDS)
{
m_poDS = (GDALDataset*) GDALOpenEx( m_soNetworkFullName, GDAL_OF_VECTOR |
GDAL_OF_UPDATE, NULL, NULL, papszOptions );
}
if( NULL == m_poDS )
{
CPLError( CE_Failure, CPLE_OpenFailed, "Open '%s' failed",
m_soNetworkFullName.c_str() );
return CE_Failure;
}
GDALDriver *l_poDriver = m_poDS->GetDriver();
if(NULL == l_poDriver)
{
CPLError( CE_Failure, CPLE_OpenFailed, "Get dataset driver failed");
return CE_Failure;
}
if(!CheckStorageDriverSupport(l_poDriver->GetDescription()))
{
return CE_Failure;
}
// check required options
const char* pszNetworkDescription = CSLFetchNameValue(papszOptions,
GNM_MD_DESCR);
if(NULL != pszNetworkDescription)
sDescription = pszNetworkDescription;
// check Spatial reference
const char* pszSRS = CSLFetchNameValue(papszOptions, GNM_MD_SRS);
if( NULL == pszSRS )
{
CPLError( CE_Failure, CPLE_IllegalArg,
"The network spatial reference should be present" );
return CE_Failure;
}
else
{
OGRSpatialReference spatialRef;
if (spatialRef.SetFromUserInput(pszSRS) != OGRERR_NONE)
{
CPLError( CE_Failure, CPLE_IllegalArg,
"The network spatial reference should be present" );
return CE_Failure;
}
char *wktSrs = NULL;
if (spatialRef.exportToWkt(&wktSrs) != OGRERR_NONE)
{
CPLError( CE_Failure, CPLE_IllegalArg,
"The network spatial reference should be present" );
return CE_Failure;
}
m_soSRS = wktSrs;
CPLFree(wktSrs);
}
int nResult = CheckNetworkExist(pszFilename, papszOptions);
if(TRUE == nResult)
{
CPLError( CE_Failure, CPLE_IllegalArg, "The network already exist" );
return CE_Failure;
}
// Create the necessary system layers and fields
// Create meta layer
CPLErr eResult = CreateMetadataLayer(m_poDS, GNM_VERSION_NUM);
if(CE_None != eResult)
{
//an error message should come from function
return CE_Failure; }
// Create graph layer
eResult = CreateGraphLayer(m_poDS);
if(CE_None != eResult)
{
DeleteMetadataLayer();
return CE_Failure;
}
// Create features layer
eResult = CreateFeaturesLayer(m_poDS);
if(CE_None != eResult)
{
DeleteMetadataLayer();
DeleteGraphLayer();
return CE_Failure;
}
return CE_None;
}