360 lines
11 KiB
C++
360 lines
11 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2014 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
|
|
*
|
|
*****************************************************************************
|
|
*
|
|
* Initially developed by Sandro Santilli <strk@keybit.net>
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include "pgraster_featureset.hpp"
|
|
#include "pgraster_wkb_reader.hpp"
|
|
#include "../postgis/resultset.hpp"
|
|
#include "../postgis/cursorresultset.hpp"
|
|
|
|
// mapnik
|
|
#include <mapnik/global.hpp>
|
|
#include <mapnik/debug.hpp>
|
|
#include <mapnik/unicode.hpp>
|
|
#include <mapnik/value_types.hpp>
|
|
#include <mapnik/feature_factory.hpp>
|
|
#include <mapnik/ctrans.hpp>
|
|
#include <mapnik/raster.hpp>
|
|
#include <mapnik/image_data.hpp>
|
|
#include <mapnik/util/conversions.hpp>
|
|
#include <mapnik/util/trim.hpp>
|
|
#include <mapnik/global.hpp> // for int2net
|
|
#include <boost/scoped_array.hpp>
|
|
|
|
|
|
// boost
|
|
#include <boost/cstdint.hpp> // for boost::int16_t
|
|
|
|
// stl
|
|
#include <sstream>
|
|
#include <string>
|
|
|
|
using mapnik::geometry_type;
|
|
using mapnik::byte;
|
|
using mapnik::feature_factory;
|
|
using mapnik::context_ptr;
|
|
|
|
pgraster_featureset::pgraster_featureset(boost::shared_ptr<IResultSet> const& rs,
|
|
context_ptr const& ctx,
|
|
std::string const& encoding,
|
|
bool key_field, int bandno)
|
|
: rs_(rs),
|
|
ctx_(ctx),
|
|
tr_(new transcoder(encoding)),
|
|
feature_id_(1),
|
|
key_field_(key_field),
|
|
band_(bandno)
|
|
{
|
|
}
|
|
|
|
std::string numeric2string(const char* buf);
|
|
|
|
feature_ptr pgraster_featureset::next()
|
|
{
|
|
while (rs_->next())
|
|
{
|
|
// new feature
|
|
unsigned pos = 1;
|
|
feature_ptr feature;
|
|
|
|
if (key_field_)
|
|
{
|
|
std::string name = rs_->getFieldName(pos);
|
|
|
|
// null feature id is not acceptable
|
|
if (rs_->isNull(pos))
|
|
{
|
|
MAPNIK_LOG_WARN(pgraster) << "pgraster_featureset: null value encountered for key_field: " << name;
|
|
continue;
|
|
}
|
|
// create feature with user driven id from attribute
|
|
int oid = rs_->getTypeOID(pos);
|
|
const char* buf = rs_->getValue(pos);
|
|
|
|
// validation happens of this type at initialization
|
|
mapnik::value_integer val;
|
|
|
|
if (oid == 20)
|
|
{
|
|
val = int8net(buf);
|
|
}
|
|
else if (oid == 21)
|
|
{
|
|
val = int2net(buf);
|
|
}
|
|
else
|
|
{
|
|
val = int4net(buf);
|
|
}
|
|
|
|
MAPNIK_LOG_WARN(pgraster) << "pgraster_featureset: feature key: " << val;
|
|
|
|
feature = feature_factory::create(ctx_, val);
|
|
// TODO - extend feature class to know
|
|
// that its id is also an attribute to avoid
|
|
// this duplication
|
|
feature->put<mapnik::value_integer>(name,val);
|
|
++pos;
|
|
}
|
|
else
|
|
{
|
|
// fallback to auto-incrementing id
|
|
MAPNIK_LOG_WARN(pgraster) << "pgraster_featureset: feature id: " << feature_id_;
|
|
|
|
feature = feature_factory::create(ctx_, feature_id_);
|
|
++feature_id_;
|
|
}
|
|
|
|
// null geometry is not acceptable
|
|
if (rs_->isNull(0))
|
|
{
|
|
MAPNIK_LOG_WARN(pgraster) << "pgraster_featureset: null value encountered for raster";
|
|
continue;
|
|
}
|
|
|
|
// parse geometry
|
|
int size = rs_->getFieldLength(0);
|
|
const uint8_t *data = (const uint8_t*)rs_->getValue(0);
|
|
|
|
mapnik::raster_ptr raster = pgraster_wkb_reader::read(data, size, band_);
|
|
if (!raster)
|
|
{
|
|
MAPNIK_LOG_WARN(pgraster) << "pgraster_featureset: could not parse raster wkb";
|
|
// TODO: throw an exception ?
|
|
continue;
|
|
}
|
|
MAPNIK_LOG_WARN(pgraster) << "pgraster_featureset: raster of " << raster->data_.width() << "x" << raster->data_.height() << " pixels covering extent " << raster->ext_;
|
|
feature->set_raster(raster);
|
|
|
|
unsigned num_attrs = ctx_->size() + 1;
|
|
for (; pos < num_attrs; ++pos)
|
|
{
|
|
std::string name = rs_->getFieldName(pos);
|
|
|
|
// NOTE: we intentionally do not store null here
|
|
// since it is equivalent to the attribute not existing
|
|
if (!rs_->isNull(pos))
|
|
{
|
|
const char* buf = rs_->getValue(pos);
|
|
const int oid = rs_->getTypeOID(pos);
|
|
switch (oid)
|
|
{
|
|
case 16: //bool
|
|
{
|
|
feature->put(name, (buf[0] != 0));
|
|
break;
|
|
}
|
|
|
|
case 23: //int4
|
|
{
|
|
feature->put<mapnik::value_integer>(name, int4net(buf));
|
|
break;
|
|
}
|
|
|
|
case 21: //int2
|
|
{
|
|
feature->put<mapnik::value_integer>(name, int2net(buf));
|
|
break;
|
|
}
|
|
|
|
case 20: //int8/BigInt
|
|
{
|
|
feature->put<mapnik::value_integer>(name, int8net(buf));
|
|
break;
|
|
}
|
|
|
|
case 700: //float4
|
|
{
|
|
float val;
|
|
float4net(val, buf);
|
|
feature->put(name, static_cast<double>(val));
|
|
break;
|
|
}
|
|
|
|
case 701: //float8
|
|
{
|
|
double val;
|
|
float8net(val, buf);
|
|
feature->put(name, val);
|
|
break;
|
|
}
|
|
|
|
case 25: //text
|
|
case 1043: //varchar
|
|
case 705: //literal
|
|
{
|
|
feature->put(name, tr_->transcode(buf));
|
|
break;
|
|
}
|
|
|
|
case 1042: //bpchar
|
|
{
|
|
std::string str = mapnik::util::trim_copy(buf);
|
|
feature->put(name, tr_->transcode(str.c_str()));
|
|
break;
|
|
}
|
|
|
|
case 1700: //numeric
|
|
{
|
|
double val;
|
|
std::string str = numeric2string(buf);
|
|
if (mapnik::util::string2double(str, val))
|
|
{
|
|
feature->put(name, val);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
MAPNIK_LOG_WARN(pgraster) << "pgraster_featureset: Unknown type_oid=" << oid;
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return feature;
|
|
}
|
|
return feature_ptr();
|
|
}
|
|
|
|
|
|
pgraster_featureset::~pgraster_featureset()
|
|
{
|
|
rs_->close();
|
|
}
|
|
|
|
std::string numeric2string(const char* buf)
|
|
{
|
|
boost::int16_t ndigits = int2net(buf);
|
|
boost::int16_t weight = int2net(buf+2);
|
|
boost::int16_t sign = int2net(buf+4);
|
|
boost::int16_t dscale = int2net(buf+6);
|
|
|
|
boost::scoped_array<boost::int16_t> digits(new boost::int16_t[ndigits]);
|
|
for (int n=0; n < ndigits ;++n)
|
|
{
|
|
digits[n] = int2net(buf+8+n*2);
|
|
}
|
|
|
|
std::ostringstream ss;
|
|
|
|
if (sign == 0x4000) ss << "-";
|
|
|
|
int i = std::max(weight,boost::int16_t(0));
|
|
int d = 0;
|
|
|
|
// Each numeric "digit" is actually a value between 0000 and 9999 stored in a 16 bit field.
|
|
// For example, the number 1234567809990001 is stored as four digits: [1234] [5678] [999] [1].
|
|
// Note that the last two digits show that the leading 0's are lost when the number is split.
|
|
// We must be careful to re-insert these 0's when building the string.
|
|
|
|
while ( i >= 0)
|
|
{
|
|
if (i <= weight && d < ndigits)
|
|
{
|
|
// All digits after the first must be padded to make the field 4 characters long
|
|
if (d != 0)
|
|
{
|
|
#ifdef _WINDOWS
|
|
int dig = digits[d];
|
|
if (dig < 10)
|
|
{
|
|
ss << "000"; // 0000 - 0009
|
|
}
|
|
else if (dig < 100)
|
|
{
|
|
ss << "00"; // 0010 - 0099
|
|
}
|
|
else
|
|
{
|
|
ss << "0"; // 0100 - 0999;
|
|
}
|
|
#else
|
|
switch(digits[d])
|
|
{
|
|
case 0 ... 9:
|
|
ss << "000"; // 0000 - 0009
|
|
break;
|
|
case 10 ... 99:
|
|
ss << "00"; // 0010 - 0099
|
|
break;
|
|
case 100 ... 999:
|
|
ss << "0"; // 0100 - 0999
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
ss << digits[d++];
|
|
}
|
|
else
|
|
{
|
|
if (d == 0)
|
|
ss << "0";
|
|
else
|
|
ss << "0000";
|
|
}
|
|
|
|
i--;
|
|
}
|
|
if (dscale > 0)
|
|
{
|
|
ss << '.';
|
|
// dscale counts the number of decimal digits following the point, not the numeric digits
|
|
while (dscale > 0)
|
|
{
|
|
int value;
|
|
if (i <= weight && d < ndigits)
|
|
value = digits[d++];
|
|
else
|
|
value = 0;
|
|
|
|
// Output up to 4 decimal digits for this value
|
|
if (dscale > 0) {
|
|
ss << (value / 1000);
|
|
value %= 1000;
|
|
dscale--;
|
|
}
|
|
if (dscale > 0) {
|
|
ss << (value / 100);
|
|
value %= 100;
|
|
dscale--;
|
|
}
|
|
if (dscale > 0) {
|
|
ss << (value / 10);
|
|
value %= 10;
|
|
dscale--;
|
|
}
|
|
if (dscale > 0) {
|
|
ss << value;
|
|
dscale--;
|
|
}
|
|
|
|
i--;
|
|
}
|
|
}
|
|
return ss.str();
|
|
}
|