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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//$Id$
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// mapnik
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#include <mapnik/global.hpp>
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#include <mapnik/wkb.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/sql_utils.hpp>
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#include <mapnik/feature_factory.hpp>
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#include "postgis_featureset.hpp"
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#include "resultset.hpp"
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#include "cursorresultset.hpp"
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// boost
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#include <boost/lexical_cast.hpp>
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#include <boost/algorithm/string.hpp>
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// stl
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#include <sstream>
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#include <string>
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using boost::lexical_cast;
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using boost::bad_lexical_cast;
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using boost::trim_copy;
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using mapnik::geometry_type;
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using mapnik::byte;
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using mapnik::geometry_utils;
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using mapnik::feature_factory;
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postgis_featureset::postgis_featureset(boost::shared_ptr<IResultSet> const& rs,
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std::string const& encoding,
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bool multiple_geometries,
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unsigned num_attrs=0)
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: rs_(rs),
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multiple_geometries_(multiple_geometries),
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num_attrs_(num_attrs),
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tr_(new transcoder(encoding)),
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totalGeomSize_(0),
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feature_id_(1) {}
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feature_ptr postgis_featureset::next()
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{
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if (rs_->next())
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{
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feature_ptr feature(feature_factory::create(feature_id_));
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++feature_id_;
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int size = rs_->getFieldLength(0);
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const char *data = rs_->getValue(0);
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geometry_utils::from_wkb(*feature,data,size,multiple_geometries_);
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totalGeomSize_+=size;
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for (unsigned pos=1;pos<num_attrs_+1;++pos)
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{
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std::string name = rs_->getFieldName(pos);
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if (!rs_->isNull(pos))
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{
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const char* buf=rs_->getValue(pos);
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int oid = rs_->getTypeOID(pos);
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if (oid==16) //bool
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{
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boost::put(*feature,name,buf[0] != 0);
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}
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else if (oid==23) //int4
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{
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int val = int4net(buf);
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boost::put(*feature,name,val);
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}
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else if (oid==21) //int2
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{
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int val = int2net(buf);
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boost::put(*feature,name,val);
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}
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else if (oid==20) //int8/BigInt
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{
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int val = int8net(buf);
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boost::put(*feature,name,val);
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}
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else if (oid == 700) // float4
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{
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float val;
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float4net(val,buf);
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boost::put(*feature,name,val);
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}
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else if (oid == 701) // float8
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{
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double val;
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float8net(val,buf);
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boost::put(*feature,name,val);
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}
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else if (oid==25 || oid==1043) // text or varchar
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{
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UnicodeString ustr = tr_->transcode(buf);
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boost::put(*feature,name,ustr);
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}
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else if (oid==1042)
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{
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UnicodeString ustr = tr_->transcode(trim_copy(std::string(buf)).c_str()); // bpchar
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boost::put(*feature,name,ustr);
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}
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else if (oid == 1700) // numeric
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{
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std::string str = mapnik::numeric2string(buf);
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try
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{
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double val = boost::lexical_cast<double>(str);
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boost::put(*feature,name,val);
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}
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catch (boost::bad_lexical_cast & ex)
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{
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std::clog << ex.what() << "\n";
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}
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}
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else
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{
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#ifdef MAPNIK_DEBUG
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std::clog << "Postgis Plugin: uknown OID = " << oid << " FIXME " << std::endl;
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#endif
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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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else
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{
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rs_->close();
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return feature_ptr();
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}
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}
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postgis_featureset::~postgis_featureset()
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{
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rs_->close();
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}
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