int GMLReader::PrescanForTemplate ()
{
int iCount = 0;
GMLFeature *poFeature;
//int bSequentialLayers = TRUE;
GFSTemplateList *pCC = new GFSTemplateList();
/* processing GML features */
while( (poFeature = NextFeature()) != NULL )
{
GMLFeatureClass *poClass = poFeature->GetClass();
const CPLXMLNode* const * papsGeomList = poFeature->GetGeometryList();
int b_has_geom = FALSE;
if( papsGeomList != NULL )
{
int i = 0;
const CPLXMLNode *psNode = papsGeomList[i];
while( psNode != NULL )
{
b_has_geom = TRUE;
i++;
psNode = papsGeomList[i];
}
}
pCC->Update( poClass->GetElementName(), b_has_geom );
delete poFeature;
}
gmlUpdateFeatureClasses( pCC, this, &m_bSequentialLayers );
if ( m_bSequentialLayers == TRUE )
ReArrangeTemplateClasses( pCC );
iCount = pCC->GetClassCount();
delete pCC;
CleanupParser();
return iCount > 0;
}
int GMLReader::PrescanForSchema( int bGetExtents )
{
GMLFeature *poFeature;
if( m_pszFilename == NULL )
return FALSE;
SetClassListLocked( FALSE );
ClearClasses();
if( !SetupParser() )
return FALSE;
while( (poFeature = NextFeature()) != NULL )
{
GMLFeatureClass *poClass = poFeature->GetClass();
if( poClass->GetFeatureCount() == -1 )
poClass->SetFeatureCount( 1 );
else
poClass->SetFeatureCount( poClass->GetFeatureCount() + 1 );
#ifdef SUPPORT_GEOMETRY
if( bGetExtents )
{
OGRGeometry *poGeometry = NULL;
if( poFeature->GetGeometry() != NULL
&& strlen(poFeature->GetGeometry()) != 0 )
{
poGeometry = OGRGeometryFactory::createFromGML(
poFeature->GetGeometry() );
}
if( poGeometry != NULL )
{
double dfXMin, dfXMax, dfYMin, dfYMax;
OGREnvelope sEnvelope;
poGeometry->getEnvelope( &sEnvelope );
delete poGeometry;
if( poClass->GetExtents(&dfXMin, &dfXMax, &dfYMin, &dfYMax) )
{
dfXMin = MIN(dfXMin,sEnvelope.MinX);
dfXMax = MAX(dfXMax,sEnvelope.MaxX);
dfYMin = MIN(dfYMin,sEnvelope.MinY);
dfYMax = MAX(dfYMax,sEnvelope.MaxY);
}
else
{
dfXMin = sEnvelope.MinX;
dfXMax = sEnvelope.MaxX;
dfYMin = sEnvelope.MinY;
dfYMax = sEnvelope.MaxY;
}
poClass->SetExtents( dfXMin, dfXMax, dfYMin, dfYMax );
}
#endif /* def SUPPORT_GEOMETRY */
}
delete poFeature;
}
CleanupParser();
return GetClassCount() > 0;
}
int NASReader::PrescanForSchema( int bGetExtents )
{
GMLFeature *poFeature;
if( m_pszFilename == NULL )
return FALSE;
SetClassListLocked( FALSE );
ClearClasses();
if( !SetupParser() )
return FALSE;
while( (poFeature = NextFeature()) != NULL )
{
GMLFeatureClass *poClass = poFeature->GetClass();
if( poClass->GetFeatureCount() == -1 )
poClass->SetFeatureCount( 1 );
else
poClass->SetFeatureCount( poClass->GetFeatureCount() + 1 );
#ifdef SUPPORT_GEOMETRY
if( bGetExtents )
{
OGRGeometry *poGeometry = NULL;
if( poFeature->GetGeometry() != NULL
&& strlen(poFeature->GetGeometry()) != 0 )
{
poGeometry = (OGRGeometry *) OGR_G_CreateFromGML(
poFeature->GetGeometry() );
}
if( poGeometry != NULL )
{
double dfXMin, dfXMax, dfYMin, dfYMax;
OGREnvelope sEnvelope;
OGRwkbGeometryType eGType = (OGRwkbGeometryType)
poClass->GetGeometryType();
// Merge geometry type into layer.
if( poClass->GetFeatureCount() == 1 && eGType == wkbUnknown )
eGType = wkbNone;
poClass->SetGeometryType(
(int) OGRMergeGeometryTypes(
eGType, poGeometry->getGeometryType() ) );
// merge extents.
poGeometry->getEnvelope( &sEnvelope );
delete poGeometry;
if( poClass->GetExtents(&dfXMin, &dfXMax, &dfYMin, &dfYMax) )
{
dfXMin = MIN(dfXMin,sEnvelope.MinX);
dfXMax = MAX(dfXMax,sEnvelope.MaxX);
dfYMin = MIN(dfYMin,sEnvelope.MinY);
dfYMax = MAX(dfYMax,sEnvelope.MaxY);
}
else
{
dfXMin = sEnvelope.MinX;
dfXMax = sEnvelope.MaxX;
dfYMin = sEnvelope.MinY;
dfYMax = sEnvelope.MaxY;
}
poClass->SetExtents( dfXMin, dfXMax, dfYMin, dfYMax );
}
else
{
if( poClass->GetGeometryType() == (int) wkbUnknown
&& poClass->GetFeatureCount() == 1 )
poClass->SetGeometryType( wkbNone );
}
#endif /* def SUPPORT_GEOMETRY */
}
delete poFeature;
}
CleanupParser();
return GetClassCount() > 0;
}
int NASReader::PrescanForSchema( int bGetExtents )
{
GMLFeature *poFeature;
if( m_pszFilename == NULL )
return FALSE;
SetClassListLocked( FALSE );
ClearClasses();
if( !SetupParser() )
return FALSE;
std::string osWork;
while( (poFeature = NextFeature()) != NULL )
{
GMLFeatureClass *poClass = poFeature->GetClass();
if( poClass->GetFeatureCount() == -1 )
poClass->SetFeatureCount( 1 );
else
poClass->SetFeatureCount( poClass->GetFeatureCount() + 1 );
#ifdef SUPPORT_GEOMETRY
if( bGetExtents )
{
OGRGeometry *poGeometry = NULL;
const CPLXMLNode* const * papsGeometry = poFeature->GetGeometryList();
if( papsGeometry[0] != NULL )
{
poGeometry = (OGRGeometry*) OGR_G_CreateFromGMLTree(papsGeometry[0]);
}
if( poGeometry != NULL )
{
double dfXMin, dfXMax, dfYMin, dfYMax;
OGREnvelope sEnvelope;
OGRwkbGeometryType eGType = (OGRwkbGeometryType)
poClass->GetGeometryType();
// Merge SRSName into layer.
const char* pszSRSName = GML_ExtractSrsNameFromGeometry(papsGeometry, osWork, FALSE);
// if (pszSRSName != NULL)
// m_bCanUseGlobalSRSName = FALSE;
poClass->MergeSRSName(pszSRSName);
// Merge geometry type into layer.
if( poClass->GetFeatureCount() == 1 && eGType == wkbUnknown )
eGType = wkbNone;
poClass->SetGeometryType(
(int) OGRMergeGeometryTypes(
eGType, poGeometry->getGeometryType() ) );
// merge extents.
poGeometry->getEnvelope( &sEnvelope );
delete poGeometry;
if( poClass->GetExtents(&dfXMin, &dfXMax, &dfYMin, &dfYMax) )
{
dfXMin = MIN(dfXMin,sEnvelope.MinX);
dfXMax = MAX(dfXMax,sEnvelope.MaxX);
dfYMin = MIN(dfYMin,sEnvelope.MinY);
dfYMax = MAX(dfYMax,sEnvelope.MaxY);
}
else
{
dfXMin = sEnvelope.MinX;
dfXMax = sEnvelope.MaxX;
dfYMin = sEnvelope.MinY;
dfYMax = sEnvelope.MaxY;
}
poClass->SetExtents( dfXMin, dfXMax, dfYMin, dfYMax );
}
else
{
if( poClass->GetGeometryType() == (int) wkbUnknown
&& poClass->GetFeatureCount() == 1 )
poClass->SetGeometryType( wkbNone );
}
#endif /* def SUPPORT_GEOMETRY */
}
delete poFeature;
}
CleanupParser();
return GetClassCount() > 0;
}
