159 lines
5 KiB
C++
159 lines
5 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) 2011 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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// mapnik
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#include <mapnik/global.hpp>
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#include <mapnik/value_types.hpp>
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#include <mapnik/debug.hpp>
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#include <mapnik/box2d.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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#include <mapnik/value_types.hpp>
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#include <mapnik/feature_factory.hpp>
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// ogr
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#include "ogr_featureset.hpp"
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#include "ogr_converter.hpp"
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using mapnik::query;
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using mapnik::box2d;
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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 mapnik::feature_factory;
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ogr_featureset::ogr_featureset(mapnik::context_ptr const& ctx,
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OGRLayer & layer,
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mapnik::box2d<double> const& extent,
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std::string const& encoding)
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: ctx_(ctx),
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layer_(layer),
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layerdef_(layer.GetLayerDefn()),
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tr_(new transcoder(encoding)),
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fidcolumn_(layer_.GetFIDColumn()),
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count_(0)
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{
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layer_.SetSpatialFilterRect (extent.minx(),
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extent.miny(),
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extent.maxx(),
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extent.maxy());
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}
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ogr_featureset::~ogr_featureset()
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{
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}
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feature_ptr ogr_featureset::next()
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{
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OGRFeature *poFeature;
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while ((poFeature = layer_.GetNextFeature()) != nullptr)
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{
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// ogr feature ids start at 0, so add one to stay
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// consistent with other mapnik datasources that start at 1
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mapnik::value_integer feature_id = (poFeature->GetFID() + 1);
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feature_ptr feature(feature_factory::create(ctx_,feature_id));
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OGRGeometry* geom = poFeature->GetGeometryRef();
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if (geom && ! geom->IsEmpty())
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{
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ogr_converter::convert_geometry(geom, feature);
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}
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else
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{
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MAPNIK_LOG_DEBUG(ogr) << "ogr_featureset: Feature with null geometry="
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<< poFeature->GetFID();
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OGRFeature::DestroyFeature( poFeature );
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continue;
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}
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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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const OGRFieldType type_oid = fld->GetType();
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const 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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feature->put<mapnik::value_integer>( fld_name, poFeature->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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feature->put( fld_name, poFeature->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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feature->put( fld_name, tr_->transcode(poFeature->GetFieldAsString(i)));
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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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MAPNIK_LOG_WARN(ogr) << "ogr_featureset: Unhandled type_oid=" << type_oid;
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break;
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}
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case OFTBinary:
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{
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MAPNIK_LOG_WARN(ogr) << "ogr_featureset: Unhandled type_oid=" << type_oid;
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//feature->put(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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MAPNIK_LOG_WARN(ogr) << "ogr_featureset: Unhandled type_oid=" << type_oid;
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break;
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}
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default: // unknown
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{
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MAPNIK_LOG_WARN(ogr) << "ogr_featureset: Unknown type_oid=" << type_oid;
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break;
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}
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}
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}
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OGRFeature::DestroyFeature( poFeature );
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return feature;
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}
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MAPNIK_LOG_DEBUG(ogr) << "ogr_featureset: " << count_ << " features";
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return feature_ptr();
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}
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