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Ogr2RawData.cpp
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147 lines (124 loc) · 4.51 KB
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#include "stdafx.h"
#include "Ogr2RawData.h"
#include "OgrHelper.h"
#include "OgrConverter.h"
#include "Shape.h"
#include "CustomExpression.h"
// *************************************************************
// Layer2RawData()
// *************************************************************
bool Ogr2RawData::Layer2RawData(OGRLayer* layer, Extent* extents, OgrDynamicLoader* loader, OgrLoadingTask* callback)
{
if (!layer || !extents || !loader) return false;
Debug::WriteWithThreadId(Debug::Format("View extents: %f %f %f %f", extents->left, extents->right, extents->bottom, extents->top), DebugOgrLoading);
layer->SetSpatialFilterRect(extents->left, extents->bottom, extents->right, extents->top);
// Get number of loaded features:
int numFeatures;
{ // Locking the provider in this section
CSingleLock lock(&loader->ProviderLock, TRUE);
numFeatures = static_cast<int>(layer->GetFeatureCount());
}
callback->FeatureCount = numFeatures;
if (!loader->CanLoad(numFeatures))
{
Debug::WriteWithThreadId("Too much features. Skip loading.", DebugOgrLoading);
return false;
}
OGRFeature *poFeature;
VARIANT_BOOL vb;
// ! Don't forget to delete the shape records if data is not used !
vector<ShapeRecordData*> shapeData;
{ // Locking the provider in this section
CSingleLock lock(&loader->ProviderLock, TRUE);
CStringA fidColumn = layer->GetFIDColumn();
bool hasFID = fidColumn.GetLength() > 0;
OGRFeatureDefn *poFields = layer->GetLayerDefn();
layer->ResetReading();
while ((poFeature = layer->GetNextFeature()) != NULL)
{
// Get shape or create empty one:
IShape* shp = NULL;
OGRGeometry *oGeom = poFeature->GetGeometryRef();
if (oGeom)
shp = OgrConverter::GeometryToShape(oGeom, loader->IsMShapefile);
if (!shp) // insert null shape so that client can still access it
ComHelper::CreateShape(&shp);
// Get shape record:
ShapeRecordData* data = new ShapeRecordData();
shp->ExportToBinary(&(data->Shape), &vb);
shp->Release();
FieldsToShapeRecord(poFields, poFeature, data, hasFID);
shapeData.push_back(data);
OGRFeature::DestroyFeature(poFeature);
// Check for a cancel request:
if (loader->HaveWaitingTasks()) {
Debug::WriteWithThreadId("Task cancelling.", DebugOgrLoading);
DeleteAndClearShapeData(shapeData);
return false;
}
}
}
// Check for a cancel request:
if (loader->HaveWaitingTasks()) {
Debug::WriteWithThreadId("Task cancelling.", DebugOgrLoading);
DeleteAndClearShapeData(shapeData);
return false;
}
loader->PutData(shapeData);
callback->LoadedCount = shapeData.size();
loader->LastSuccessExtents = *extents;
if (callback->LoadedCount == 0)
Debug::WriteWithThreadId("Task succeeded but no data loaded.", DebugOgrLoading);
else
Debug::WriteWithThreadId("Task succeeded.", DebugOgrLoading);
return true;
}
// *************************************************************
// DeleteAndClearShapeData()
// *************************************************************
void Ogr2RawData::DeleteAndClearShapeData(vector<ShapeRecordData*>& shapeData) {
// Delete referenced objects in the vector
for (size_t i = 0; i < shapeData.size(); i++) {
delete shapeData[i];
}
shapeData.clear();
}
// *************************************************************
// FieldsToShapeRecord()
// *************************************************************
void Ogr2RawData::FieldsToShapeRecord(OGRFeatureDefn* poFields, OGRFeature* poFeature, ShapeRecordData* data, bool hasFid)
{
if (hasFid)
{
VARIANT* var = new VARIANT;
VariantInit(var);
var->vt = VT_I4;
var->lVal = static_cast<long>(poFeature->GetFID());
data->Row->values.push_back(var);
}
for (int iFld = 0; iFld < poFields->GetFieldCount(); iFld++)
{
OGRFieldDefn* oField = poFields->GetFieldDefn(iFld);
OGRFieldType type = oField->GetType();
VARIANT* var = new VARIANT;
VariantInit(var);
if (type == OFTInteger)
{
var->vt = VT_I4;
var->lVal = poFeature->GetFieldAsInteger(iFld);
}
else if (type == OFTReal)
{
var->vt = VT_R8;
var->dblVal = poFeature->GetFieldAsDouble(iFld);
}
else //if (type == OFTString )
{
// string should be interpreted as UTF-8 unless overridden in Global Settings
CStringW ws = OgrHelper::OgrString2Unicode(poFeature->GetFieldAsString(iFld));
var->vt = VT_BSTR;
var->bstrVal = W2BSTR(ws); // BSTR will be cleared by CComVariant destructor
}
data->Row->values.push_back(var);
}
}