void SuperMapConnection::CreateSpatialContext(
FdoString* name,
FdoString* description,
FdoString* coordinateSystem,
FdoString* coordinateSystemWkt,
FdoSpatialContextExtentType extentType,
FdoByteArray * extent,
double xyTolerance,
double zTolerance,
bool update
)
{
bool found = false;
// 检查是否有同一个WKT空间语义存在
for(FdoInt32 i = 0; i < m_SpatialContextColl->GetCount() && !found; ++i)
{
FdoPtr<SuperMapSpatialContext> sp = m_SpatialContextColl->GetItem(i);
found = (coordinateSystemWkt == sp->GetCoordinateSystemWkt());
}
// 赋新的坐标系
if(!found)
{
FdoPtr<SuperMapSpatialContext> newSp = new SuperMapSpatialContext();
FdoInt32 idxGenName = 1;
FdoStringP newName = name;
// 查找重复的空间语义名，在名字后加数字避免重名
while(m_SpatialContextColl->FindItem(newName))
{
newName = FdoStringP::Format(L"%ls_%d", (FdoString*)name, idxGenName);
idxGenName++;
}
//设置新的空间语义
newSp->SetName(newName);
newSp->SetCoordSysName(coordinateSystem);
newSp->SetCoordinateSystemWkt(coordinateSystemWkt);
newSp->SetDescription(description);
newSp->SetExtent(extent);
newSp->SetExtentType(extentType);
newSp->SetXYTolerance(xyTolerance);
newSp->SetZTolerance(zTolerance);
m_SpatialContextColl->Add(newSp);
//Todo: 往物理数据源中添加投影信息是否在此做？
}
}
void FdoRfpSpatialContextCollection::ReadXml(FdoXmlReader* reader)
{
FdoXmlSpatialContextReaderP spreader = FdoXmlSpatialContextReader::Create(reader);
// Read the one and ond supported spatial context
while (spreader->ReadNext())
{
FdoPtr<FdoRfpSpatialContext> context = new FdoRfpSpatialContext();
context->SetName(spreader->GetName());
context->SetDescription(spreader->GetDescription());
context->SetCoordinateSystem(spreader->GetCoordinateSystem());
context->SetCoordinateSystemWkt(spreader->GetCoordinateSystemWkt());
context->SetExtent(spreader->GetExtent());
context->SetExtentType(spreader->GetExtentType());
context->SetXYTolerance(spreader->GetXYTolerance());
context->SetZTolerance(spreader->GetZTolerance());
Add(context);
}
}