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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2011 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
//$Id$
// mapnik
#include <mapnik/global.hpp>
#include <mapnik/wkb.hpp>
#include <mapnik/unicode.hpp>
#include <mapnik/sql_utils.hpp>
#include <mapnik/feature_factory.hpp>
#include "postgis_featureset.hpp"
#include "resultset.hpp"
#include "cursorresultset.hpp"
// boost
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
// stl
#include <sstream>
#include <string>
using boost::lexical_cast;
using boost::bad_lexical_cast;
using boost::trim_copy;
using mapnik::geometry_type;
using mapnik::byte;
using mapnik::geometry_utils;
using mapnik::feature_factory;
postgis_featureset::postgis_featureset(boost::shared_ptr<IResultSet> const& rs,
std::string const& encoding,
bool multiple_geometries,
bool key_field=false,
unsigned num_attrs=0)
: rs_(rs),
multiple_geometries_(multiple_geometries),
num_attrs_(num_attrs),
tr_(new transcoder(encoding)),
totalGeomSize_(0),
feature_id_(1),
key_field_(key_field) {}
feature_ptr postgis_featureset::next()
{
if (rs_->next())
{
// new feature
feature_ptr feature;
unsigned pos = 1;
if (key_field_) {
// create feature with user driven id from attribute
int oid = rs_->getTypeOID(pos);
const char* buf = rs_->getValue(pos);
std::string name = rs_->getFieldName(pos);
// validation happens of this type at bind()
int val;
if (oid == 20)
{
val = int8net(buf);
}
else if (oid == 21)
{
val = int2net(buf);
}
else
{
val = int4net(buf);
}
feature = feature_factory::create(val);
// TODO - extend feature class to know
// that its id is also an attribute to avoid
// this duplication
boost::put(*feature,name,val);
++pos;
} else {
// fallback to auto-incrementing id
feature = feature_factory::create(feature_id_);
++feature_id_;
}
// parse geometry
int size = rs_->getFieldLength(0);
const char *data = rs_->getValue(0);
geometry_utils::from_wkb(feature->paths(),data,size,multiple_geometries_);
totalGeomSize_+=size;
for ( ;pos<num_attrs_+1;++pos)
{
std::string name = rs_->getFieldName(pos);
if (rs_->isNull(pos))
{
boost::put(*feature,name,mapnik::value_null());
}
else
{
const char* buf = rs_->getValue(pos);
int oid = rs_->getTypeOID(pos);
if (oid==16) //bool
{
boost::put(*feature,name,buf[0] != 0);
}
else if (oid==23) //int4
{
int val = int4net(buf);
boost::put(*feature,name,val);
}
else if (oid==21) //int2
{
int val = int2net(buf);
boost::put(*feature,name,val);
}
else if (oid==20) //int8/BigInt
{
int val = int8net(buf);
boost::put(*feature,name,val);
}
else if (oid == 700) // float4
{
float val;
float4net(val,buf);
boost::put(*feature,name,val);
}
else if (oid == 701) // float8
{
double val;
float8net(val,buf);
boost::put(*feature,name,val);
}
else if (oid==25 || oid==1043) // text or varchar
{
UnicodeString ustr = tr_->transcode(buf);
boost::put(*feature,name,ustr);
}
else if (oid==1042)
{
UnicodeString ustr = tr_->transcode(trim_copy(std::string(buf)).c_str()); // bpchar
boost::put(*feature,name,ustr);
}
else if (oid == 1700) // numeric
{
std::string str = mapnik::numeric2string(buf);
try
{
double val = boost::lexical_cast<double>(str);
boost::put(*feature,name,val);
}
catch (boost::bad_lexical_cast & ex)
{
std::clog << ex.what() << "\n";
}
}
else
{
#ifdef MAPNIK_DEBUG
std::clog << "Postgis Plugin: uknown OID = " << oid << " FIXME " << std::endl;
#endif
}
}
}
return feature;
}
else
{
rs_->close();
return feature_ptr();
}
}
postgis_featureset::~postgis_featureset()
{
rs_->close();
}
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