197 lines
6 KiB
C++
197 lines
6 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2007 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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//$Id$
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// mapnik
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#include <mapnik/global.hpp>
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#include <mapnik/datasource.hpp>
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#include <mapnik/envelope.hpp>
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#include <mapnik/geometry.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/feature_layer_desc.hpp>
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#include <mapnik/wkb.hpp>
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#include <mapnik/unicode.hpp>
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// boost
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#include <boost/iostreams/stream.hpp>
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#include <boost/iostreams/device/file.hpp>
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#include <boost/iostreams/device/mapped_file.hpp>
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// ogr
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#include "ogr_index_featureset.hpp"
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#include "ogr_converter.hpp"
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#include "ogr_index.hpp"
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#include "ogr_feature_ptr.hpp"
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using std::clog;
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using std::endl;
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using mapnik::query;
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using mapnik::Envelope;
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using mapnik::CoordTransform;
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using mapnik::Feature;
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using mapnik::feature_ptr;
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using mapnik::geometry_utils;
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using mapnik::transcoder;
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using namespace boost::iostreams;
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template <typename filterT>
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ogr_index_featureset<filterT>::ogr_index_featureset(OGRDataSource & dataset,
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OGRLayer & layer,
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const filterT& filter,
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const std::string& index_file,
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const std::string& encoding,
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const bool multiple_geometries)
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: dataset_(dataset),
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layer_(layer),
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layerdef_(layer.GetLayerDefn()),
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filter_(filter),
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tr_(new transcoder(encoding)),
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fidcolumn_(layer_.GetFIDColumn ()),
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multiple_geometries_(multiple_geometries),
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count_(0)
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{
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stream<mapped_file_source> file (index_file);
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if (file)
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{
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ogr_index<filterT,stream<mapped_file_source> >::query(filter,file,ids_);
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file.close();
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}
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std::sort(ids_.begin(),ids_.end());
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#ifdef MAPNIK_DEBUG
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std::clog<< "query size=" << ids_.size() << "\n";
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#endif
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itr_ = ids_.begin();
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// reset reading
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layer_.ResetReading();
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}
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template <typename filterT>
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ogr_index_featureset<filterT>::~ogr_index_featureset() {}
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template <typename filterT>
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feature_ptr ogr_index_featureset<filterT>::next()
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{
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if (itr_ != ids_.end())
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{
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int pos = *itr_++;
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layer_.SetNextByIndex (pos);
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ogr_feature_ptr feat (layer_.GetNextFeature());
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if ((*feat) != NULL)
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{
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OGRGeometry* geom=(*feat)->GetGeometryRef();
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if (!geom->IsEmpty())
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{
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feature_ptr feature(new Feature((*feat)->GetFID()));
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ogr_converter::convert_geometry (geom, feature, multiple_geometries_);
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++count_;
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int fld_count = layerdef_->GetFieldCount();
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for (int i = 0; i < fld_count; i++)
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{
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OGRFieldDefn* fld = layerdef_->GetFieldDefn (i);
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OGRFieldType type_oid = fld->GetType ();
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std::string fld_name = fld->GetNameRef ();
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switch (type_oid)
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{
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case OFTInteger:
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{
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boost::put(*feature,fld_name,(*feat)->GetFieldAsInteger (i));
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break;
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}
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case OFTReal:
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{
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boost::put(*feature,fld_name,(*feat)->GetFieldAsDouble (i));
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break;
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}
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case OFTString:
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case OFTWideString: // deprecated !
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{
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UnicodeString ustr = tr_->transcode((*feat)->GetFieldAsString (i));
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boost::put(*feature,fld_name,ustr);
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break;
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}
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case OFTIntegerList:
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case OFTRealList:
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case OFTStringList:
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case OFTWideStringList: // deprecated !
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{
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#ifdef MAPNIK_DEBUG
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clog << "unhandled type_oid=" << type_oid << endl;
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#endif
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break;
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}
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case OFTBinary:
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{
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#ifdef MAPNIK_DEBUG
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clog << "unhandled type_oid=" << type_oid << endl;
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#endif
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//boost::put(*feature,name,feat->GetFieldAsBinary (i, size));
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break;
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}
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case OFTDate:
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case OFTTime:
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case OFTDateTime: // unhandled !
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{
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#ifdef MAPNIK_DEBUG
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clog << "unhandled type_oid=" << type_oid << endl;
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#endif
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break;
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}
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default: // unknown
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{
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#ifdef MAPNIK_DEBUG
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clog << "unknown type_oid=" << type_oid << endl;
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#endif
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break;
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}
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}
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}
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return feature;
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}
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}
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}
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#ifdef MAPNIK_DEBUG
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clog << count_ << " features" << endl;
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#endif
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return feature_ptr();
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}
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template class ogr_index_featureset<mapnik::filter_in_box>;
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template class ogr_index_featureset<mapnik::filter_at_point>;
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